Provides extension methods for strings.
Some of these methods treat strings as a plain collection of Chars without any regard for Unicode handling. Unless the user takes Unicode handling in to account or makes sure the strings don't require such handling, these methods may result in unpaired or invalidly paired surrogate code units.
Attributes
- Companion
- object
- Source
- StringOps.scala
- Graph
-
- Supertypes
Members list
Value members
Concrete methods
Return the current string concatenated n times.
Alias for concat
Alias for concat
Alias for concat
Alias for prependedAll
Alias for prependedAll
Alias for prepended
Alias for prepended
Alias for appended
Alias for appended
Alias for appendedAll
Alias for appendedAll
Returns true if this is less than that
Returns true if this is less than or equal to that.
Returns true if this is greater than that.
Returns true if this is greater than or equal to that.
Appends this string to a string builder.
Appends this string to a string builder using a separator string.
Appends this string to a string builder using start, end and separator strings.
Appends this string to a string builder using start, end and separator strings.
Attributes
- Source
- StringOps.scala
A copy of the string with an element appended
A copy of the string with an element appended
A copy of the string with all elements from a collection appended
A copy of the string with another string appended
Get the char at the specified index.
Returns this string with first character converted to upper case.
Returns this string with first character converted to upper case. If the first character of the string is capitalized, it is returned unchanged. This method does not convert characters outside the Basic Multilingual Plane (BMP).
Attributes
- Source
- StringOps.scala
Steps over characters in this string.
Steps over characters in this string. Values are packed in Int for efficiency and compatibility with Java 8 Streams which have an efficient specialization for Int.
Attributes
- Source
- StringOps.scala
Steps over code points in this string.
Builds a new String by applying a partial function to all chars of this String on which the function is defined.
Builds a new String by applying a partial function to all chars of this String on which the function is defined.
Value parameters
- pf
-
the partial function which filters and maps the String.
Attributes
- Returns
-
a new String resulting from applying the given partial function
pfto each char on which it is defined and collecting the results. - Source
- StringOps.scala
Builds a new collection by applying a partial function to all chars of this String on which the function is defined.
Builds a new collection by applying a partial function to all chars of this String on which the function is defined.
Type parameters
- B
-
the element type of the returned collection.
Value parameters
- pf
-
the partial function which filters and maps the String.
Attributes
- Returns
-
a new collection resulting from applying the given partial function
pfto each char on which it is defined and collecting the results. - Source
- StringOps.scala
Iterates over combinations of elements.
Iterates over combinations of elements.
A combination of length n is a sequence of n elements selected in order of their first index in this sequence.
For example, "xyx" has two combinations of length 2. The x is selected first: "xx", "xy". The sequence "yx" is not returned as a combination because it is subsumed by "xy".
If there is more than one way to generate the same combination, only one will be returned.
For example, the result "xy" arbitrarily selected one of the x elements.
As a further illustration, "xyxx" has three different ways to generate "xy" because there are three elements x to choose from. Moreover, there are three unordered pairs "xx" but only one is returned.
It is not specified which of these equal combinations is returned. It is an implementation detail that should not be relied on. For example, the combination "xx" does not necessarily contain the first x in this sequence. This behavior is observable if the elements compare equal but are not identical.
As a consequence, "xyx".combinations(3).next() is "xxy": the combination does not reflect the order of the original sequence, but the order in which elements were selected, by "first index"; the order of each x element is also arbitrary.
Attributes
- Returns
-
An Iterator which traverses the n-element combinations of this string.
- Note
-
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Example
-
"abbbc".combinations(2).foreach(println) // ab // ac // bb // bc "bab".combinations(2).foreach(println) // bb // ba - Source
- StringOps.scala
Attributes
- Source
- StringOps.scala
Returns a new collection containing the chars from this string followed by the elements from the right hand operand.
Returns a new collection containing the chars from this string followed by the elements from the right hand operand.
Value parameters
- suffix
-
the collection to append.
Attributes
- Returns
-
a new collection which contains all chars of this string followed by all elements of
suffix. - Source
- StringOps.scala
Returns a new string containing the chars from this string followed by the chars from the right hand operand.
Returns a new string containing the chars from this string followed by the chars from the right hand operand.
Value parameters
- suffix
-
the collection to append.
Attributes
- Returns
-
a new string which contains all chars of this string followed by all chars of
suffix. - Source
- StringOps.scala
Returns a new string containing the chars from this string followed by the chars from the right hand operand.
Returns a new string containing the chars from this string followed by the chars from the right hand operand.
Value parameters
- suffix
-
the string to append.
Attributes
- Returns
-
a new string which contains all chars of this string followed by all chars of
suffix. - Source
- StringOps.scala
Tests whether this string contains the given character.
Tests whether this string contains the given character.
Value parameters
- elem
-
the character to test.
Attributes
- Returns
-
trueif this string has an element that is equal (as determined by==) toelem,falseotherwise. - Source
- StringOps.scala
Copy chars of this string to an array.
Copy chars of this string to an array. Fills the given array xs starting at index 0. Copying will stop once either the entire string has been copied or the end of the array is reached
Value parameters
- xs
-
the array to fill.
Attributes
- Source
- StringOps.scala
Copy chars of this string to an array.
Copy chars of this string to an array. Fills the given array xs starting at index start. Copying will stop once either the entire string has been copied or the end of the array is reached
Value parameters
- start
-
the starting index.
- xs
-
the array to fill.
Attributes
- Source
- StringOps.scala
Copy chars of this string to an array.
Copy chars of this string to an array. Fills the given array xs starting at index start with at most len chars. Copying will stop once either the entire string has been copied, or the end of the array is reached or len chars have been copied.
Value parameters
- len
-
the maximal number of elements to copy.
- start
-
the starting index.
- xs
-
the array to fill.
Attributes
- Source
- StringOps.scala
Counts the number of chars in this string which satisfy a predicate
Counts the number of chars in this string which satisfy a predicate
Attributes
- Source
- StringOps.scala
Computes the multiset difference between this string and another sequence.
Computes the multiset difference between this string and another sequence.
Value parameters
- that
-
the sequence of chars to remove
Attributes
- Returns
-
a new string which contains all chars of this string except some of occurrences of elements that also appear in
that. If an element valuexappears n times inthat, then the first n occurrences ofxwill not form part of the result, but any following occurrences will. - Note
-
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Selects all distinct chars of this string ignoring the duplicates.
Selects all distinct chars of this string ignoring the duplicates.
Attributes
- Note
-
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Selects all distinct chars of this string ignoring the duplicates as determined by == after applying the transforming function f.
Selects all distinct chars of this string ignoring the duplicates as determined by == after applying the transforming function f.
Type parameters
- B
-
the type of the elements after being transformed by
f
Value parameters
- f
-
The transforming function whose result is used to determine the uniqueness of each element
Attributes
- Returns
-
a new string consisting of all the chars of this string without duplicates.
- Note
-
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
The rest of the string without its n first chars.
The rest of the string without its n first chars.
Attributes
- Note
-
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
The rest of the string without its n last chars.
The rest of the string without its n last chars.
Attributes
- Note
-
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Drops longest prefix of chars that satisfy a predicate.
Drops longest prefix of chars that satisfy a predicate.
Value parameters
- p
-
The predicate used to test elements.
Attributes
- Returns
-
the longest suffix of this string whose first element does not satisfy the predicate
p. - Source
- StringOps.scala
Tests whether a predicate holds for at least one char of this string.
Tests whether a predicate holds for at least one char of this string.
Attributes
- Source
- StringOps.scala
Selects all chars of this string which satisfy a predicate.
Selects all chars of this string which do not satisfy a predicate.
Selects all chars of this string which do not satisfy a predicate.
Attributes
- Source
- StringOps.scala
Finds the first char of the string satisfying a predicate, if any.
Finds the first char of the string satisfying a predicate, if any.
Value parameters
- p
-
the predicate used to test elements.
Attributes
- Returns
-
an option value containing the first element in the string that satisfies
p, orNoneif none exists. - Source
- StringOps.scala
Builds a new collection by applying a function to all chars of this string and using the elements of the resulting collections.
Builds a new collection by applying a function to all chars of this string and using the elements of the resulting collections.
Value parameters
- f
-
the function to apply to each char.
Attributes
- Returns
-
a new collection resulting from applying the given collection-valued function
fto each char of this string and concatenating the results. - Source
- StringOps.scala
Builds a new string by applying a function to all chars of this string and using the elements of the resulting strings.
Builds a new string by applying a function to all chars of this string and using the elements of the resulting strings.
Value parameters
- f
-
the function to apply to each char.
Attributes
- Returns
-
a new string resulting from applying the given string-valued function
fto each char of this string and concatenating the results. - Source
- StringOps.scala
Folds the chars of this string using the specified associative binary operator.
Folds the chars of this string using the specified associative binary operator.
Type parameters
- A1
-
a type parameter for the binary operator, a supertype of Char.
Value parameters
- op
-
a binary operator that must be associative.
- z
-
a neutral element for the fold operation; may be added to the result an arbitrary number of times, and must not change the result (e.g.,
Nilfor list concatenation, 0 for addition, or 1 for multiplication).
Attributes
- Returns
-
the result of applying the fold operator
opbetween all the chars andz, orzif this string is empty. - Source
- StringOps.scala
Applies a binary operator to a start value and all chars of this string, going left to right.
Applies a binary operator to a start value and all chars of this string, going left to right.
Type parameters
- B
-
the result type of the binary operator.
Value parameters
- op
-
the binary operator.
- z
-
the start value.
Attributes
- Returns
-
the result of inserting
opbetween consecutive chars of this string, going left to right with the start valuezon the left:op(...op(z, x_1), x_2, ..., x_n)where
x1, ..., xnare the chars of this string. Returnszif this string is empty. - Source
- StringOps.scala
Applies a binary operator to all chars of this string and a start value, going right to left.
Applies a binary operator to all chars of this string and a start value, going right to left.
Type parameters
- B
-
the result type of the binary operator.
Value parameters
- op
-
the binary operator.
- z
-
the start value.
Attributes
- Returns
-
the result of inserting
opbetween consecutive chars of this string, going right to left with the start valuezon the right:op(x_1, op(x_2, ... op(x_n, z)...))where
x1, ..., xnare the chars of this string. Returnszif this string is empty. - Source
- StringOps.scala
Tests whether a predicate holds for all chars of this string.
Tests whether a predicate holds for all chars of this string.
Value parameters
- p
-
the predicate used to test elements.
Attributes
- Returns
-
trueif this string is empty or the given predicatepholds for all chars of this string, otherwisefalse. - Source
- StringOps.scala
Apply f to each element for its side effects.
Apply f to each element for its side effects. Note: [U] parameter needed to help scalac's type inference.
Attributes
- Source
- StringOps.scala
Uses the underlying string as a pattern (in a fashion similar to printf in C), and uses the supplied arguments to fill in the holes.
Uses the underlying string as a pattern (in a fashion similar to printf in C), and uses the supplied arguments to fill in the holes.
The interpretation of the formatting patterns is described in java.util.Formatter, with the addition that classes deriving from ScalaNumber (such as scala.BigInt and scala.BigDecimal) are unwrapped to pass a type which Formatter understands.
Value parameters
- args
-
the arguments used to instantiating the pattern.
Attributes
- Source
- StringOps.scala
Like format(args*) but takes an initial Locale parameter which influences formatting as in java.lang.String's format.
Like format(args*) but takes an initial Locale parameter which influences formatting as in java.lang.String's format.
The interpretation of the formatting patterns is described in java.util.Formatter, with the addition that classes deriving from ScalaNumber (such as scala.BigInt and scala.BigDecimal) are unwrapped to pass a type which Formatter understands.
Value parameters
- args
-
the arguments used to instantiating the pattern.
- l
-
an instance of
java.util.Locale
Attributes
- Source
- StringOps.scala
Partitions this string into a map of strings according to some discriminator function.
Partitions this string into a map of strings according to some discriminator function.
Type parameters
- K
-
the type of keys returned by the discriminator function.
Value parameters
- f
-
the discriminator function.
Attributes
- Returns
-
A map from keys to strings such that the following invariant holds:
(xs groupBy f)(k) = xs filter (x => f(x) == k)That is, every key
kis bound to a string of those elementsxfor whichf(x)equalsk. - Note
-
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Partitions elements in fixed size strings.
Partitions elements in fixed size strings.
Value parameters
- size
-
the number of elements per group
Attributes
- Returns
-
An iterator producing strings of size
size, except the last will be less than sizesizeif the elements don't divide evenly. - See also
-
scala.collection.Iterator, method
grouped - Note
-
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Selects the first char of this string.
Selects the first char of this string.
Attributes
- Returns
-
the first char of this string.
- Throws
-
NoSuchElementException if the string is empty.
- Source
- StringOps.scala
Optionally selects the first char.
Optionally selects the first char.
Attributes
- Returns
-
the first char of this string if it is nonempty,
Noneif it is empty. - Source
- StringOps.scala
Finds index of the first char satisfying some predicate after or at some start index.
Finds index of the first char satisfying some predicate after or at some start index.
Value parameters
- from
-
the start index
- p
-
the predicate used to test elements.
Attributes
- Returns
-
the index
>= fromof the first element of this string that satisfies the predicatep, or-1, if none exists. - Source
- StringOps.scala
Produces the range of all indices of this string.
Produces the range of all indices of this string.
Attributes
- Returns
-
a
Rangevalue from0to one less than the length of this string. - Source
- StringOps.scala
The initial part of the string without its last char.
The initial part of the string without its last char.
Attributes
- Note
-
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Iterates over the inits of this string.
Iterates over the inits of this string. The first value will be this string and the final one will be an empty string, with the intervening values the results of successive applications of init.
Attributes
- Returns
-
an iterator over all the inits of this string
- Note
-
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Computes the multiset intersection between this string and another sequence.
Computes the multiset intersection between this string and another sequence.
Value parameters
- that
-
the sequence of chars to intersect with.
Attributes
- Returns
-
a new string which contains all chars of this string which also appear in
that. If an element valuexappears n times inthat, then the first n occurrences ofxwill be retained in the result, but any following occurrences will be omitted. - Note
-
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Iterator can be used only once
Attributes
- Source
- StringOps.scala
Selects the last char of this string.
Selects the last char of this string.
Attributes
- Returns
-
the last char of this string.
- Throws
-
NoSuchElementException if the string is empty.
- Source
- StringOps.scala
Finds index of the last char satisfying some predicate before or at some end index.
Finds index of the last char satisfying some predicate before or at some end index.
Value parameters
- end
-
the end index
- p
-
the predicate used to test elements.
Attributes
- Returns
-
the index
<= endof the last element of this string that satisfies the predicatep, or-1, if none exists. - Source
- StringOps.scala
Optionally selects the last char.
Optionally selects the last char.
Attributes
- Returns
-
the last char of this string if it is nonempty,
Noneif it is empty. - Source
- StringOps.scala
Analogous to zip except that the elements in each collection are not consumed until a strict operation is invoked on the returned LazyZip2 decorator.
Analogous to zip except that the elements in each collection are not consumed until a strict operation is invoked on the returned LazyZip2 decorator.
Calls to lazyZip can be chained to support higher arities (up to 4) without incurring the expense of constructing and deconstructing intermediary tuples.
val xs = List(1, 2, 3)
val res = (xs lazyZip xs lazyZip xs lazyZip xs).map((a, b, c, d) => a + b + c + d)
// res == List(4, 8, 12)
Type parameters
- B
-
the type of the second element in each eventual pair
Value parameters
- that
-
the iterable providing the second element of each eventual pair
Attributes
- Returns
-
a decorator
LazyZip2that allows strict operations to be performed on the lazily evaluated pairs or chained calls tolazyZip. Implicit conversion toIterable[(A, B)]is also supported. - Source
- StringOps.scala
Attributes
- Source
- StringOps.scala
Attributes
- Source
- StringOps.scala
Lines in this string, where a line is terminated by "\n", "\r", "\r\n", or the end of the string.
Lines in this string, where a line is terminated by "\n", "\r", "\r\n", or the end of the string. A line may be empty. Line terminators are removed.
Attributes
- Source
- StringOps.scala
Return an iterator of all lines embedded in this string, including trailing line separator characters.
Return an iterator of all lines embedded in this string, including trailing line separator characters.
The empty string yields an empty iterator.
Attributes
- Source
- StringOps.scala
Builds a new collection by applying a function to all chars of this string.
Builds a new collection by applying a function to all chars of this string.
Value parameters
- f
-
the function to apply to each char.
Attributes
- Returns
-
a new collection resulting from applying the given function
fto each char of this string and collecting the results. - Source
- StringOps.scala
Builds a new string by applying a function to all chars of this string.
Builds a new string by applying a function to all chars of this string.
Value parameters
- f
-
the function to apply to each char.
Attributes
- Returns
-
a new string resulting from applying the given function
fto each char of this string and collecting the results. - Source
- StringOps.scala
Displays all elements of this string in a string using start, end, and separator strings.
Displays all elements of this string in a string using start, end, and separator strings.
Value parameters
- end
-
the ending string.
- sep
-
the separator string.
- start
-
the starting string.
Attributes
- Returns
-
The resulting string begins with the string
startand ends with the stringend. Inside, the string chars of this string are separated by the stringsep. - Note
-
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Displays all elements of this string in a string using a separator string.
Displays all elements of this string in a string using a separator string.
Value parameters
- sep
-
the separator string.
Attributes
- Returns
-
In the resulting string the chars of this string are separated by the string
sep. - Note
-
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Returns this string
Tests whether the string is not empty.
Returns a collection with an element appended until a given target length is reached.
Returns a collection with an element appended until a given target length is reached.
Value parameters
- elem
-
the padding value
- len
-
the target length
Attributes
- Returns
-
a collection consisting of this string followed by the minimal number of occurrences of
elemso that the resulting collection has a length of at leastlen. - Source
- StringOps.scala
Returns a string with a char appended until a given target length is reached.
Returns a string with a char appended until a given target length is reached.
Value parameters
- elem
-
the padding value
- len
-
the target length
Attributes
- Returns
-
a string consisting of this string followed by the minimal number of occurrences of
elemso that the resulting string has a length of at leastlen. - Source
- StringOps.scala
A pair of, first, all chars that satisfy predicate p and, second, all chars that do not.
A pair of, first, all chars that satisfy predicate p and, second, all chars that do not.
Attributes
- Source
- StringOps.scala
Applies a function f to each character of the string and returns a pair of strings: the first one made of those characters returned by f that were wrapped in scala.util.Left, and the second one made of those wrapped in scala.util.Right.
Applies a function f to each character of the string and returns a pair of strings: the first one made of those characters returned by f that were wrapped in scala.util.Left, and the second one made of those wrapped in scala.util.Right.
Example:
val xs = "1one2two3three" partitionMap { c =>
if (c > 'a') Left(c) else Right(c)
}
// xs == ("onetwothree", "123")
Value parameters
- f
-
the 'split function' mapping the elements of this string to an scala.util.Either
Attributes
- Returns
-
a pair of strings: the first one made of those characters returned by
fthat were wrapped in scala.util.Left, and the second one made of those wrapped in scala.util.Right. - Source
- StringOps.scala
Produces a new collection where a slice of characters in this string is replaced by another collection.
Produces a new collection where a slice of characters in this string is replaced by another collection.
Patching at negative indices is the same as patching starting at 0. Patching at indices at or larger than the length of the original string appends the patch to the end. If more values are replaced than actually exist, the excess is ignored.
Value parameters
- from
-
the index of the first replaced char
- other
-
the replacement collection
- replaced
-
the number of chars to drop in the original string
Attributes
- Returns
-
a new collection consisting of all chars of this string except that
replacedchars starting fromfromare replaced byother. - Source
- StringOps.scala
Produces a new collection where a slice of characters in this string is replaced by another collection.
Produces a new collection where a slice of characters in this string is replaced by another collection.
Patching at negative indices is the same as patching starting at 0. Patching at indices at or larger than the length of the original string appends the patch to the end. If more values are replaced than actually exist, the excess is ignored.
Value parameters
- from
-
the index of the first replaced char
- other
-
the replacement string
- replaced
-
the number of chars to drop in the original string
Attributes
- Returns
-
a new string consisting of all chars of this string except that
replacedchars starting fromfromare replaced byother. - Note
-
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Produces a new string where a slice of characters in this string is replaced by another string.
Produces a new string where a slice of characters in this string is replaced by another string.
Patching at negative indices is the same as patching starting at 0. Patching at indices at or larger than the length of the original string appends the patch to the end. If more values are replaced than actually exist, the excess is ignored.
Value parameters
- from
-
the index of the first replaced char
- other
-
the replacement string
- replaced
-
the number of chars to drop in the original string
Attributes
- Returns
-
a new string consisting of all chars of this string except that
replacedchars starting fromfromare replaced byother. - Note
-
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Iterates over distinct permutations of elements.
Iterates over distinct permutations of elements.
Attributes
- Returns
-
An Iterator which traverses the distinct permutations of this string.
- Note
-
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Example
-
"abb".permutations.foreach(println) // abb // bab // bba - Source
- StringOps.scala
A copy of the string with an element prepended
A copy of the string with an char prepended
A copy of the string with all elements from a collection prepended
A copy of the string with all elements from a collection prepended
Attributes
- Source
- StringOps.scala
A copy of the string with another string prepended
You can follow a string with .r, turning it into a Regex.
You can follow a string with .r, turning it into a Regex. E.g.
"""A\w*""".r is the regular expression for ASCII-only identifiers starting with A.
"""(?<month>\d\d)-(?<day>\d\d)-(?<year>\d\d\d\d)""".r matches dates and provides its subcomponents through groups named "month", "day" and "year".
Attributes
- Source
- StringOps.scala
Returns new sequence with elements in reversed order.
Returns new sequence with elements in reversed order.
Attributes
- Note
-
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
An iterator yielding chars in reversed order.
An iterator yielding chars in reversed order.
Note: xs.reverseIterator is the same as xs.reverse.iterator but implemented more efficiently.
Attributes
- Returns
-
an iterator yielding the chars of this string in reversed order
- Source
- StringOps.scala
Attributes
- Source
- StringOps.scala
Attributes
- Source
- StringOps.scala
Attributes
- Source
- StringOps.scala
Selects an interval of elements.
Selects an interval of elements. The returned string is made up of all elements x which satisfy the invariant:
from <= indexOf(x) < until
Value parameters
- from
-
the lowest index to include from this string.
- until
-
the lowest index to EXCLUDE from this string.
Attributes
- Returns
-
a string containing the elements greater than or equal to index
fromextending up to (but not including) indexuntilof this string. - Note
-
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Groups chars in fixed size blocks by passing a "sliding window" over them (as opposed to partitioning them, as is done in grouped.)
Groups chars in fixed size blocks by passing a "sliding window" over them (as opposed to partitioning them, as is done in grouped.)
Value parameters
- size
-
the number of chars per group
- step
-
the distance between the first chars of successive groups
Attributes
- Returns
-
An iterator producing strings of size
size, except the last element (which may be the only element) will be truncated if there are fewer thansizechars remaining to be grouped. - See also
-
scala.collection.Iterator, method
sliding - Note
-
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Sorts this string according to the Ordering which results from transforming an implicitly given Ordering with a transformation function.
Sorts this string according to the Ordering which results from transforming an implicitly given Ordering with a transformation function.
The sort is stable. That is, elements that are equal (as determined by ord.compare) appear in the same order in the sorted sequence as in the original.
Type parameters
- B
-
the target type of the transformation
f, and the type where the orderingordis defined.
Value parameters
- f
-
the transformation function mapping elements to some other domain
B. - ord
-
the ordering assumed on domain
B.
Attributes
- Returns
-
a string consisting of the chars of this string sorted according to the ordering where
x < yiford.lt(f(x), f(y)). - See also
- Note
-
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Sorts this string according to a comparison function.
Sorts this string according to a comparison function.
The sort is stable. That is, elements that are equal (as determined by lt) appear in the same order in the sorted sequence as in the original.
Value parameters
- lt
-
the comparison function which tests whether its first argument precedes its second argument in the desired ordering.
Attributes
- Returns
-
a string consisting of the elements of this string sorted according to the comparison function
lt. - Note
-
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Sorts the characters of this string according to an Ordering.
Sorts the characters of this string according to an Ordering.
The sort is stable. That is, elements that are equal (as determined by ord.compare) appear in the same order in the sorted sequence as in the original.
Value parameters
- ord
-
the ordering to be used to compare elements.
Attributes
- Returns
-
a string consisting of the chars of this string sorted according to the ordering
ord. - See also
- Note
-
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Splits this string into a prefix/suffix pair according to a predicate.
Splits this string into a prefix/suffix pair according to a predicate.
Note: c span p is equivalent to (but more efficient than) (c takeWhile p, c dropWhile p), provided the evaluation of the predicate p does not cause any side-effects.
Value parameters
- p
-
the test predicate
Attributes
- Returns
-
a pair consisting of the longest prefix of this string whose chars all satisfy
p, and the rest of this string. - Source
- StringOps.scala
Split this string around the separator character
Split this string around the separator character
If this string is the empty string, returns an array of strings that contains a single empty string.
If this string is not the empty string, returns an array containing the substrings terminated by the start of the string, the end of the string or the separator character, excluding empty trailing substrings
If the separator character is a surrogate character, only split on matching surrogate characters if they are not part of a surrogate pair
The behaviour follows, and is implemented in terms of String.split(re: String)
Value parameters
- separator
-
the character used as a delimiter
Attributes
- Example
-
"a.b".split('.') //returns Array("a", "b") //splitting the empty string always returns the array with a single //empty string "".split('.') //returns Array("") //only trailing empty substrings are removed "a.".split('.') //returns Array("a") ".a.".split('.') //returns Array("", "a") "..a..".split('.') //returns Array("", "", "a") //all parts are empty and trailing ".".split('.') //returns Array() "..".split('.') //returns Array() //surrogate pairs val high = 0xD852.toChar val low = 0xDF62.toChar val highstring = high.toString val lowstring = low.toString //well-formed surrogate pairs are not split val highlow = highstring + lowstring highlow.split(high) //returns Array(highlow) //bare surrogate characters are split val bare = "_" + highstring + "_" bare.split(high) //returns Array("_", "_") - Source
- StringOps.scala
Splits this string into two at a given position.
Splits this string into two at a given position. Note: c splitAt n is equivalent to (c take n, c drop n).
Value parameters
- n
-
the position at which to split.
Attributes
- Returns
-
a pair of strings consisting of the first
nchars of this string, and the other chars. - Note
-
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Stepper can be used with Java 8 Streams.
Stepper can be used with Java 8 Streams. This method is equivalent to a call to charStepper. See also codePointStepper.
Attributes
- Source
- StringOps.scala
Strip the trailing line separator from this string if there is one.
Strip the trailing line separator from this string if there is one. The line separator is taken as "\n", "\r", or "\r\n".
Attributes
- Source
- StringOps.scala
For every line in this string:
For every line in this string:
Strip a leading prefix consisting of blanks or control characters followed by marginChar from the line.
Attributes
- Source
- StringOps.scala
For every line in this string:
For every line in this string:
Strip a leading prefix consisting of blanks or control characters followed by | from the line.
Attributes
- Source
- StringOps.scala
Returns this string with the given prefix stripped.
Returns this string with the given prefix stripped. If this string does not start with prefix, it is returned unchanged.
Attributes
- Source
- StringOps.scala
Returns this string with the given suffix stripped.
Returns this string with the given suffix stripped. If this string does not end with suffix, it is returned unchanged.
Attributes
- Source
- StringOps.scala
The rest of the string without its first char.
The rest of the string without its first char.
Attributes
- Note
-
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Iterates over the tails of this string.
Iterates over the tails of this string. The first value will be this string and the final one will be an empty string, with the intervening values the results of successive applications of tail.
Attributes
- Returns
-
an iterator over all the tails of this string
- Note
-
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
A string containing the first n chars of this string.
A string containing the first n chars of this string.
Attributes
- Note
-
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
A string containing the last n chars of this string.
A string containing the last n chars of this string.
Attributes
- Note
-
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Takes longest prefix of chars that satisfy a predicate.
Attributes
- Source
- StringOps.scala
Attributes
- Throws
-
java.lang.IllegalArgumentException If the string does not contain a parsable
Boolean. - Source
- StringOps.scala
Try to parse as a Boolean
Try to parse as a Boolean
Attributes
- Returns
-
Some(true)if the string is "true" case insensitive,Some(false)if the string is "false" case insensitive, andNoneif the string is anything else - Throws
-
java.lang.NullPointerException if the string is
null - Source
- StringOps.scala
Parse as a Byte (string must contain only decimal digits and optional leading - or +).
Parse as a Byte (string must contain only decimal digits and optional leading - or +).
Attributes
- Throws
-
java.lang.NumberFormatException If the string does not contain a parsable
Byte. - Source
- StringOps.scala
Try to parse as a Byte
Try to parse as a Byte
Attributes
- Returns
-
Some(value)if the string contains a valid byte value, otherwiseNone - Throws
-
java.lang.NullPointerException if the string is
null - Source
- StringOps.scala
Parse as a Double (surrounding whitespace is removed with a trim).
Parse as a Double (surrounding whitespace is removed with a trim).
Attributes
- Throws
-
java.lang.NullPointerException If the string is null.
java.lang.NumberFormatException If the string does not contain a parsable
Double. - Source
- StringOps.scala
Try to parse as a Double
Try to parse as a Double
Attributes
- Returns
-
Some(value)if the string is a parsableDouble,Noneotherwise - Throws
-
java.lang.NullPointerException If the string is null
- Source
- StringOps.scala
Parse as a Float (surrounding whitespace is removed with a trim).
Parse as a Float (surrounding whitespace is removed with a trim).
Attributes
- Throws
-
java.lang.NullPointerException If the string is null.
java.lang.NumberFormatException If the string does not contain a parsable
Float. - Source
- StringOps.scala
Try to parse as a Float
Try to parse as a Float
Attributes
- Returns
-
Some(value)if the string is a parsableFloat,Noneotherwise - Throws
-
java.lang.NullPointerException If the string is null
- Source
- StringOps.scala
Parse as an Int (string must contain only decimal digits and optional leading - or +).
Parse as an Int (string must contain only decimal digits and optional leading - or +).
Attributes
- Throws
-
java.lang.NumberFormatException If the string does not contain a parsable
Int. - Source
- StringOps.scala
Try to parse as an Int
Try to parse as an Int
Attributes
- Returns
-
Some(value)if the string contains a valid Int value, otherwiseNone - Throws
-
java.lang.NullPointerException if the string is
null - Source
- StringOps.scala
Parse as a Long (string must contain only decimal digits and optional leading - or +).
Parse as a Long (string must contain only decimal digits and optional leading - or +).
Attributes
- Throws
-
java.lang.NumberFormatException If the string does not contain a parsable
Long. - Source
- StringOps.scala
Try to parse as a Long
Try to parse as a Long
Attributes
- Returns
-
Some(value)if the string contains a valid long value, otherwiseNone - Throws
-
java.lang.NullPointerException if the string is
null - Source
- StringOps.scala
Parse as a Short (string must contain only decimal digits and optional leading - or +).
Parse as a Short (string must contain only decimal digits and optional leading - or +).
Attributes
- Throws
-
java.lang.NumberFormatException If the string does not contain a parsable
Short. - Source
- StringOps.scala
Try to parse as a Short
Try to parse as a Short
Attributes
- Returns
-
Some(value)if the string contains a valid short value, otherwiseNone - Throws
-
java.lang.NullPointerException if the string is
null - Source
- StringOps.scala
A copy of this string with one single replaced element.
A copy of this string with one single replaced element.
Value parameters
- elem
-
the replacing element
- index
-
the position of the replacement
Attributes
- Returns
-
a new string which is a copy of this string with the element at position
indexreplaced byelem. - Throws
-
IndexOutOfBoundsException if
indexdoes not satisfy0 <= index < length. - Note
-
This method treats a string as a plain sequence of Char code units and makes no attempt to keep surrogate pairs or codepoint sequences together. The user is responsible for making sure such cases are handled correctly. Failing to do so may result in an invalid Unicode string.
- Source
- StringOps.scala
Attributes
- Source
- StringOps.scala
Creates a non-strict filter of this string.
Creates a non-strict filter of this string.
Value parameters
- p
-
the predicate used to test elements.
Attributes
- Returns
-
an object of class
stringOps.WithFilter, which supportsmap,flatMap,foreach, andwithFilteroperations. All these operations apply to those chars of this string which satisfy the predicatep. - Note
-
the difference between
c filter pandc withFilter pis that the former creates a new string, whereas the latter only restricts the domain of subsequentmap,flatMap,foreach, andwithFilteroperations. - Source
- StringOps.scala
Deprecated methods
Return all lines in this string in an iterator, excluding trailing line end characters; i.e., apply .stripLineEnd to all lines returned by linesWithSeparators.
Return all lines in this string in an iterator, excluding trailing line end characters; i.e., apply .stripLineEnd to all lines returned by linesWithSeparators.
Attributes
- Deprecated
- true
- Source
- StringOps.scala
You can follow a string with .r(g1, ... , gn), turning it into a Regex, with group names g1 through gn.
You can follow a string with .r(g1, ... , gn), turning it into a Regex, with group names g1 through gn.
"""(\d\d)-(\d\d)-(\d\d\d\d)""".r("month", "day", "year") matches dates and provides its subcomponents through groups named "month", "day" and "year".
Value parameters
- groupNames
-
The names of the groups in the pattern, in the order they appear.
Attributes
- Deprecated
- true
- Source
- StringOps.scala
Replace all literal occurrences of literal with the literal string replacement.
Replace all literal occurrences of literal with the literal string replacement. This method is equivalent to java.lang.String#replace.
Value parameters
- literal
-
the string which should be replaced everywhere it occurs
- replacement
-
the replacement string
Attributes
- Returns
-
the resulting string
- Deprecated
- true
- Source
- StringOps.scala