BufferedSource

class BufferedSource(inputStream: InputStream, bufferSize: Int)(val codec: Codec) extends Source

This object provides convenience methods to create an iterable representation of a source file.

This object provides convenience methods to create an iterable representation of a source file.

class Source
trait Closeable
trait Iterator[Char]
class Object
trait Matchable
class Any

Type members

Inherited classlikes

class GroupedIterator[B >: A](self: Iterator[B], size: Int, step: Int)

A flexible iterator for transforming an Iterator[A] into an Iterator[Seq[A]], with configurable sequence size, step, and strategy for dealing with elements which don't fit evenly.

A flexible iterator for transforming an Iterator[A] into an Iterator[Seq[A]], with configurable sequence size, step, and strategy for dealing with elements which don't fit evenly.

Typical uses can be achieved via methods grouped and sliding.

Inherited from
Iterator
Inherited from
Source
object NoPositioner
Inherited from
Source
@nowarn("cat=deprecation")
class Positioner(encoder: Position)
Inherited from
Source
@nowarn("cat=deprecation")

A Position implementation which ignores errors in the positions.

A Position implementation which ignores errors in the positions.

Inherited from
Source
Inherited from
Source

Value members

Constructors

def this(inputStream: InputStream)(codec: Codec)

Concrete methods

override def addString(sb: StringBuilder, start: String, sep: String, end: String): StringBuilder

Efficiently appends the entire remaining input.

Efficiently appends the entire remaining input.

Note: This function may temporarily load the entire buffer into memory.

Definition Classes
override def getLines(): Iterator[String]
Definition Classes

Inherited methods

final def ++[B >: Char](xs: => IterableOnce[B]): Iterator[B]
Inherited from
Iterator

Appends all elements of this collection to a string builder.

Appends all elements of this collection to a string builder. The written text consists of the string representations (w.r.t. the method toString) of all elements of this collection without any separator string.

Example:

scala> val a = List(1,2,3,4)
a: List[Int] = List(1, 2, 3, 4)

scala> val b = new StringBuilder()
b: StringBuilder =

scala> val h = a.addString(b)
h: StringBuilder = 1234
Value Params
b

the string builder to which elements are appended.

Returns

the string builder b to which elements were appended.

Inherited from
IterableOnceOps

Appends all elements of this collection to a string builder using a separator string.

Appends all elements of this collection to a string builder using a separator string. The written text consists of the string representations (w.r.t. the method toString) of all elements of this collection, separated by the string sep.

Example:

scala> val a = List(1,2,3,4)
a: List[Int] = List(1, 2, 3, 4)

scala> val b = new StringBuilder()
b: StringBuilder =

scala> a.addString(b, ", ")
res0: StringBuilder = 1, 2, 3, 4
Value Params
b

the string builder to which elements are appended.

sep

the separator string.

Returns

the string builder b to which elements were appended.

Inherited from
IterableOnceOps

Creates a buffered iterator from this iterator.

Creates a buffered iterator from this iterator.

Returns

a buffered iterator producing the same values as this iterator.

See also
Note

Reuse: After calling this method, one should discard the iterator it was called on, and use only the iterator that was returned. Using the old iterator is undefined, subject to change, and may result in changes to the new iterator as well.

Inherited from
Iterator
def ch: Char
Inherited from
Source
def close(): Unit

The close() method closes the underlying resource.

The close() method closes the underlying resource.

Inherited from
Source
def collect[B](pf: PartialFunction[Char, B]): Iterator[B]
Inherited from
Iterator

Finds the first element of the collection for which the given partial function is defined, and applies the partial function to it.

Finds the first element of the collection for which the given partial function is defined, and applies the partial function to it.

Note: may not terminate for infinite-sized collections.

Note: might return different results for different runs, unless the underlying collection type is ordered.

Value Params
pf

the partial function

Returns

an option value containing pf applied to the first value for which it is defined, or None if none exists.

Example

Seq("a", 1, 5L).collectFirst({ case x: Int => x*10 }) = Some(10)

Inherited from
IterableOnceOps
def concat[B >: Char](xs: => IterableOnce[B]): Iterator[B]
Inherited from
Iterator
def contains(elem: Any): Boolean

Tests whether this iterator contains a given value as an element.

Tests whether this iterator contains a given value as an element.

Note: may not terminate for infinite iterators.

Value Params
elem

the element to test.

Returns

true if this iterator produces some value that is is equal (as determined by ==) to elem, false otherwise.

Note

Reuse: After calling this method, one should discard the iterator it was called on. Using it is undefined and subject to change.

Inherited from
Iterator
def copyToArray[B >: Char](xs: Array[B], start: Int, len: Int): Int

Copy elements to an array, returning the number of elements written.

Copy elements to an array, returning the number of elements written.

Fills the given array xs starting at index start with at most len elements of this collection.

Copying will stop once either all the elements of this collection have been copied, or the end of the array is reached, or len elements have been copied.

Type Params
B

the type of the elements of the array.

Value Params
len

the maximal number of elements to copy.

start

the starting index of xs.

xs

the array to fill.

Returns

the number of elements written to the array

Note

Reuse: After calling this method, one should discard the iterator it was called on. Using it is undefined and subject to change.

Inherited from
IterableOnceOps
@deprecatedOverriding("This should always forward to the 3-arg version of this method", since = "2.13.4")
def copyToArray[B >: Char](xs: Array[B], start: Int): Int

Copy elements to an array, returning the number of elements written.

Copy elements to an array, returning the number of elements written.

Fills the given array xs starting at index start with values of this collection.

Copying will stop once either all the elements of this collection have been copied, or the end of the array is reached.

Type Params
B

the type of the elements of the array.

Value Params
start

the starting index of xs.

xs

the array to fill.

Returns

the number of elements written to the array

Note

Reuse: After calling this method, one should discard the iterator it was called on. Using it is undefined and subject to change.

Inherited from
IterableOnceOps
@deprecatedOverriding("This should always forward to the 3-arg version of this method", since = "2.13.4")
def copyToArray[B >: Char](xs: Array[B]): Int

Copy elements to an array, returning the number of elements written.

Copy elements to an array, returning the number of elements written.

Fills the given array xs starting at index start with values of this collection.

Copying will stop once either all the elements of this collection have been copied, or the end of the array is reached.

Type Params
B

the type of the elements of the array.

Value Params
xs

the array to fill.

Returns

the number of elements written to the array

Note

Reuse: After calling this method, one should discard the iterator it was called on. Using it is undefined and subject to change.

Inherited from
IterableOnceOps
def corresponds[B](that: IterableOnce[B])(p: (Char, B) => Boolean): Boolean

Tests whether every element of this collection's iterator relates to the corresponding element of another collection by satisfying a test predicate.

Tests whether every element of this collection's iterator relates to the corresponding element of another collection by satisfying a test predicate.

Note: will not terminate for infinite-sized collections.

Type Params
B

the type of the elements of that

Value Params
p

the test predicate, which relates elements from both collections

that

the other collection

Returns

true if both collections have the same length and p(x, y) is true for all corresponding elements x of this iterator and y of that, otherwise false

Inherited from
IterableOnceOps
def count(p: Char => Boolean): Int

Counts the number of elements in the collection which satisfy a predicate.

Counts the number of elements in the collection which satisfy a predicate.

Note: will not terminate for infinite-sized collections.

Value Params
p

the predicate used to test elements.

Returns

the number of elements satisfying the predicate p.

Inherited from
IterableOnceOps

Builds a new iterator from this one without any duplicated elements on it.

Builds a new iterator from this one without any duplicated elements on it.

Returns

iterator with distinct elements

Note

Reuse: After calling this method, one should discard the iterator it was called on. Using it is undefined and subject to change.

Inherited from
Iterator
def distinctBy[B](f: Char => B): Iterator[Char]

Builds a new iterator from this one without any duplicated elements as determined by == after applying the transforming function f.

Builds a new iterator from this one without any duplicated elements as determined by == after applying the transforming function f.

Type Params
B

the type of the elements after being transformed by f

Value Params
f

The transforming function whose result is used to determine the uniqueness of each element

Returns

iterator with distinct elements

Note

Reuse: After calling this method, one should discard the iterator it was called on. Using it is undefined and subject to change.

Inherited from
Iterator
def drop(n: Int): Iterator[Char]
Inherited from
Iterator
Inherited from
Iterator

Creates two new iterators that both iterate over the same elements as this iterator (in the same order).

Creates two new iterators that both iterate over the same elements as this iterator (in the same order). The duplicate iterators are considered equal if they are positioned at the same element.

Given that most methods on iterators will make the original iterator unfit for further use, this methods provides a reliable way of calling multiple such methods on an iterator.

Returns

a pair of iterators

Note

The implementation may allocate temporary storage for elements iterated by one iterator but not yet by the other.

Reuse: After calling this method, one should discard the iterator it was called on, and use only the iterators that were returned. Using the old iterator is undefined, subject to change, and may result in changes to the new iterators as well.

Inherited from
Iterator
def exists(p: Char => Boolean): Boolean

Tests whether a predicate holds for at least one element of this collection.

Tests whether a predicate holds for at least one element of this collection.

Note: may not terminate for infinite-sized collections.

Value Params
p

the predicate used to test elements.

Returns

true if the given predicate p is satisfied by at least one element of this collection, otherwise false

Inherited from
IterableOnceOps
Inherited from
Iterator
Inherited from
Iterator
def find(p: Char => Boolean): Option[Char]

Finds the first element of the collection satisfying a predicate, if any.

Finds the first element of the collection satisfying a predicate, if any.

Note: may not terminate for infinite-sized collections.

Note: might return different results for different runs, unless the underlying collection type is ordered.

Value Params
p

the predicate used to test elements.

Returns

an option value containing the first element in the collection that satisfies p, or None if none exists.

Inherited from
IterableOnceOps
def flatMap[B](f: Char => IterableOnce[B]): Iterator[B]
Inherited from
Iterator
def flatten[B](ev: Char => IterableOnce[B]): Iterator[B]
Inherited from
Iterator
def fold[A1 >: Char](z: A1)(op: (A1, A1) => A1): A1

Folds the elements of this collection using the specified associative binary operator.

Folds the elements of this collection using the specified associative binary operator. The default implementation in IterableOnce is equivalent to foldLeft but may be overridden for more efficient traversal orders.

The order in which operations are performed on elements is unspecified and may be nondeterministic.

Note: will not terminate for infinite-sized collections.

Type Params
A1

a type parameter for the binary operator, a supertype of A.

Value Params
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., Nil for list concatenation, 0 for addition, or 1 for multiplication).

Returns

the result of applying the fold operator op between all the elements and z, or z if this collection is empty.

Inherited from
IterableOnceOps
def foldLeft[B](z: B)(op: (B, Char) => B): B

Applies a binary operator to a start value and all elements of this collection, going left to right.

Applies a binary operator to a start value and all elements of this collection, going left to right.

Note: will not terminate for infinite-sized collections.

Note: might return different results for different runs, unless the underlying collection type is ordered or the operator is associative and commutative.

Type Params
B

the result type of the binary operator.

Value Params
op

the binary operator.

z

the start value.

Returns

the result of inserting op between consecutive elements of this collection, going left to right with the start value z on the left: op(...op(z, x1), x2, ..., xn) where x1, ..., xn are the elements of this collection. Returns z if this collection is empty.

Inherited from
IterableOnceOps
def foldRight[B](z: B)(op: (Char, B) => B): B

Applies a binary operator to all elements of this collection and a start value, going right to left.

Applies a binary operator to all elements of this collection and a start value, going right to left.

Note: will not terminate for infinite-sized collections.

Note: might return different results for different runs, unless the underlying collection type is ordered or the operator is associative and commutative.

Type Params
B

the result type of the binary operator.

Value Params
op

the binary operator.

z

the start value.

Returns

the result of inserting op between consecutive elements of this collection, going right to left with the start value z on the right: op(x1, op(x2, ... op(xn, z)...)) where x1, ..., xn are the elements of this collection. Returns z if this collection is empty.

Inherited from
IterableOnceOps
def forall(p: Char => Boolean): Boolean

Tests whether a predicate holds for all elements of this collection.

Tests whether a predicate holds for all elements of this collection.

Note: may not terminate for infinite-sized collections.

Value Params
p

the predicate used to test elements.

Returns

true if this collection is empty or the given predicate p holds for all elements of this collection, otherwise false.

Inherited from
IterableOnceOps
def foreach[U](f: Char => U): Unit

Apply f to each element for its side effects Note: [U] parameter needed to help scalac's type inference.

Apply f to each element for its side effects Note: [U] parameter needed to help scalac's type inference.

Inherited from
IterableOnceOps
def grouped[B >: Char](size: Int): GroupedIterator[B]

Returns an iterator which groups this iterator into fixed size blocks.

Returns an iterator which groups this iterator into fixed size blocks. Example usages:

// Returns List(List(1, 2, 3), List(4, 5, 6), List(7)))
(1 to 7).iterator.grouped(3).toList
// Returns List(List(1, 2, 3), List(4, 5, 6))
(1 to 7).iterator.grouped(3).withPartial(false).toList
// Returns List(List(1, 2, 3), List(4, 5, 6), List(7, 20, 25)
// Illustrating that withPadding's argument is by-name.
val it2 = Iterator.iterate(20)(_ + 5)
(1 to 7).iterator.grouped(3).withPadding(it2.next).toList
Note

Reuse: After calling this method, one should discard the iterator it was called on, and use only the iterator that was returned. Using the old iterator is undefined, subject to change, and may result in changes to the new iterator as well.

Inherited from
Iterator

Returns true if this source has more characters.

Returns true if this source has more characters.

Inherited from
Source
def indexOf[B >: Char](elem: B, from: Int): Int

Returns the index of the first occurrence of the specified object in this iterable object after or at some start index.

Returns the index of the first occurrence of the specified object in this iterable object after or at some start index.

Note: may not terminate for infinite iterators.

Value Params
elem

element to search for.

from

the start index

Returns

the index >= from of the first occurrence of elem in the values produced by this iterator, or -1 if such an element does not exist until the end of the iterator is reached.

Note

Reuse: After calling this method, one should discard the iterator it was called on. Using it is undefined and subject to change.

Inherited from
Iterator
def indexOf[B >: Char](elem: B): Int

Returns the index of the first occurrence of the specified object in this iterable object.

Returns the index of the first occurrence of the specified object in this iterable object.

Note: may not terminate for infinite iterators.

Value Params
elem

element to search for.

Returns

the index of the first occurrence of elem in the values produced by this iterator, or -1 if such an element does not exist until the end of the iterator is reached.

Note

Reuse: After calling this method, one should discard the iterator it was called on. Using it is undefined and subject to change.

Inherited from
Iterator
def indexWhere(p: Char => Boolean, from: Int): Int
Inherited from
Iterator
@deprecatedOverriding("isEmpty is defined as !hasNext; override hasNext instead", "2.13.0")
override def isEmpty: Boolean
Definition Classes
Inherited from
Iterator

Tests whether this collection can be repeatedly traversed.

Tests whether this collection can be repeatedly traversed. Always true for Iterables and false for Iterators unless overridden.

Returns

true if it is repeatedly traversable, false otherwise.

Inherited from
IterableOnceOps
final def iterator: Iterator[Char]
Inherited from
Iterator
Returns

The number of elements in this collection, if it can be cheaply computed, -1 otherwise. Cheaply usually means: Not requiring a collection traversal.

Inherited from
IterableOnce
final def length: Int
Inherited from
Iterator
def map[B](f: Char => B): Iterator[B]
Inherited from
Iterator
def max[B >: Char](ord: Ordering[B]): Char

Finds the largest element.

Finds the largest element.

Note: will not terminate for infinite-sized collections.

Type Params
B

The type over which the ordering is defined.

Value Params
ord

An ordering to be used for comparing elements.

Returns

the largest element of this collection with respect to the ordering ord.

Throws
UnsupportedOperationException

if this collection is empty.

Inherited from
IterableOnceOps
def maxBy[B](f: Char => B)(cmp: Ordering[B]): Char

Finds the first element which yields the largest value measured by function f.

Finds the first element which yields the largest value measured by function f.

Note: will not terminate for infinite-sized collections.

Type Params
B

The result type of the function f.

Value Params
cmp

An ordering to be used for comparing elements.

f

The measuring function.

Returns

the first element of this collection with the largest value measured by function f with respect to the ordering cmp.

Throws
UnsupportedOperationException

if this collection is empty.

Inherited from
IterableOnceOps
def maxByOption[B](f: Char => B)(cmp: Ordering[B]): Option[Char]

Finds the first element which yields the largest value measured by function f.

Finds the first element which yields the largest value measured by function f.

Note: will not terminate for infinite-sized collections.

Type Params
B

The result type of the function f.

Value Params
cmp

An ordering to be used for comparing elements.

f

The measuring function.

Returns

an option value containing the first element of this collection with the largest value measured by function f with respect to the ordering cmp.

Inherited from
IterableOnceOps
def maxOption[B >: Char](ord: Ordering[B]): Option[Char]

Finds the largest element.

Finds the largest element.

Note: will not terminate for infinite-sized collections.

Type Params
B

The type over which the ordering is defined.

Value Params
ord

An ordering to be used for comparing elements.

Returns

an option value containing the largest element of this collection with respect to the ordering ord.

Inherited from
IterableOnceOps
def min[B >: Char](ord: Ordering[B]): Char

Finds the smallest element.

Finds the smallest element.

Note: will not terminate for infinite-sized collections.

Type Params
B

The type over which the ordering is defined.

Value Params
ord

An ordering to be used for comparing elements.

Returns

the smallest element of this collection with respect to the ordering ord.

Throws
UnsupportedOperationException

if this collection is empty.

Inherited from
IterableOnceOps
def minBy[B](f: Char => B)(cmp: Ordering[B]): Char

Finds the first element which yields the smallest value measured by function f.

Finds the first element which yields the smallest value measured by function f.

Note: will not terminate for infinite-sized collections.

Type Params
B

The result type of the function f.

Value Params
cmp

An ordering to be used for comparing elements.

f

The measuring function.

Returns

the first element of this collection with the smallest value measured by function f with respect to the ordering cmp.

Throws
UnsupportedOperationException

if this collection is empty.

Inherited from
IterableOnceOps
def minByOption[B](f: Char => B)(cmp: Ordering[B]): Option[Char]

Finds the first element which yields the smallest value measured by function f.

Finds the first element which yields the smallest value measured by function f.

Note: will not terminate for infinite-sized collections.

Type Params
B

The result type of the function f.

Value Params
cmp

An ordering to be used for comparing elements.

f

The measuring function.

Returns

an option value containing the first element of this collection with the smallest value measured by function f with respect to the ordering cmp.

Inherited from
IterableOnceOps
def minOption[B >: Char](ord: Ordering[B]): Option[Char]

Finds the smallest element.

Finds the smallest element.

Note: will not terminate for infinite-sized collections.

Type Params
B

The type over which the ordering is defined.

Value Params
ord

An ordering to be used for comparing elements.

Returns

an option value containing the smallest element of this collection with respect to the ordering ord.

Inherited from
IterableOnceOps
final def mkString: String

Displays all elements of this collection in a string.

Displays all elements of this collection in a string.

Delegates to addString, which can be overridden.

Returns

a string representation of this collection. In the resulting string the string representations (w.r.t. the method toString) of all elements of this collection follow each other without any separator string.

Inherited from
IterableOnceOps
final def mkString(sep: String): String

Displays all elements of this collection in a string using a separator string.

Displays all elements of this collection in a string using a separator string.

Delegates to addString, which can be overridden.

Value Params
sep

the separator string.

Returns

a string representation of this collection. In the resulting string the string representations (w.r.t. the method toString) of all elements of this collection are separated by the string sep.

Example

List(1, 2, 3).mkString("|") = "1|2|3"

Inherited from
IterableOnceOps
final def mkString(start: String, sep: String, end: String): String

Displays all elements of this collection in a string using start, end, and separator strings.

Displays all elements of this collection in a string using start, end, and separator strings.

Delegates to addString, which can be overridden.

Value Params
end

the ending string.

sep

the separator string.

start

the starting string.

Returns

a string representation of this collection. The resulting string begins with the string start and ends with the string end. Inside, the string representations (w.r.t. the method toString) of all elements of this collection are separated by the string sep.

Example

List(1, 2, 3).mkString("(", "; ", ")") = "(1; 2; 3)"

Inherited from
IterableOnceOps
def next(): Char

Returns next character.

Returns next character.

Inherited from
Source

Wraps the value of next() in an option.

Wraps the value of next() in an option.

Returns

Some(next) if a next element exists, None otherwise.

Inherited from
Iterator
@deprecatedOverriding("nonEmpty is defined as !isEmpty; override isEmpty instead", "2.13.0")

Tests whether the collection is not empty.

Tests whether the collection is not empty.

Returns

true if the collection contains at least one element, false otherwise.

Inherited from
IterableOnceOps
def padTo[B >: Char](len: Int, elem: B): Iterator[B]

A copy of this iterator with an element value appended until a given target length is reached.

A copy of this iterator with an element value appended until a given target length is reached.

Type Params
B

the element type of the returned iterator.

Value Params
elem

the padding value

len

the target length

Returns

a new iterator consisting of all elements of this iterator followed by the minimal number of occurrences of elem so that the resulting collection has a length of at least len.

Inherited from
Iterator

Partitions this iterator in two iterators according to a predicate.

Partitions this iterator in two iterators according to a predicate.

Value Params
p

the predicate on which to partition

Returns

a pair of iterators: the iterator that satisfies the predicate p and the iterator that does not. The relative order of the elements in the resulting iterators is the same as in the original iterator.

Note

Reuse: After calling this method, one should discard the iterator it was called on, and use only the iterators that were returned. Using the old iterator is undefined, subject to change, and may result in changes to the new iterators as well.

Inherited from
Iterator
def patch[B >: Char](from: Int, patchElems: Iterator[B], replaced: Int): Iterator[B]

Returns this iterator with patched values.

Returns this iterator with patched values. Patching at negative indices is the same as patching starting at 0. Patching at indices at or larger than the length of the original iterator appends the patch to the end. If more values are replaced than actually exist, the excess is ignored.

Value Params
from

The start index from which to patch

patchElems

The iterator of patch values

replaced

The number of values in the original iterator that are replaced by the patch.

Note

Reuse: After calling this method, one should discard the iterator it was called on, as well as the one passed as a parameter, and use only the iterator that was returned. Using the old iterators is undefined, subject to change, and may result in changes to the new iterator as well.

Inherited from
Iterator
def pos: Int
Inherited from
Source
def product[B >: Char](num: Numeric[B]): B

Multiplies up the elements of this collection.

Multiplies up the elements of this collection.

Note: will not terminate for infinite-sized collections.

Type Params
B

the result type of the * operator.

Value Params
num

an implicit parameter defining a set of numeric operations which includes the * operator to be used in forming the product.

Returns

the product of all elements of this collection with respect to the * operator in num.

Inherited from
IterableOnceOps
def reduce[B >: Char](op: (B, B) => B): B

Reduces the elements of this collection using the specified associative binary operator.

Reduces the elements of this collection using the specified associative binary operator.

The order in which operations are performed on elements is unspecified and may be nondeterministic.

Type Params
B

A type parameter for the binary operator, a supertype of A.

Value Params
op

A binary operator that must be associative.

Returns

The result of applying reduce operator op between all the elements if the collection is nonempty.

Throws
UnsupportedOperationException

if this collection is empty.

Inherited from
IterableOnceOps
def reduceLeft[B >: Char](op: (B, Char) => B): B

Applies a binary operator to all elements of this collection, going left to right.

Applies a binary operator to all elements of this collection, going left to right.

Note: will not terminate for infinite-sized collections.

Note: might return different results for different runs, unless the underlying collection type is ordered or the operator is associative and commutative.

Type Params
B

the result type of the binary operator.

Value Params
op

the binary operator.

Returns

the result of inserting op between consecutive elements of this collection, going left to right: op( op( ... op(x1, x2) ..., xn-1), xn) where x1, ..., xn are the elements of this collection.

Throws
UnsupportedOperationException

if this collection is empty.

Inherited from
IterableOnceOps
def reduceLeftOption[B >: Char](op: (B, Char) => B): Option[B]

Optionally applies a binary operator to all elements of this collection, going left to right.

Optionally applies a binary operator to all elements of this collection, going left to right.

Note: will not terminate for infinite-sized collections.

Note: might return different results for different runs, unless the underlying collection type is ordered or the operator is associative and commutative.

Type Params
B

the result type of the binary operator.

Value Params
op

the binary operator.

Returns

an option value containing the result of reduceLeft(op) if this collection is nonempty, None otherwise.

Inherited from
IterableOnceOps
def reduceOption[B >: Char](op: (B, B) => B): Option[B]

Reduces the elements of this collection, if any, using the specified associative binary operator.

Reduces the elements of this collection, if any, using the specified associative binary operator.

The order in which operations are performed on elements is unspecified and may be nondeterministic.

Type Params
B

A type parameter for the binary operator, a supertype of A.

Value Params
op

A binary operator that must be associative.

Returns

An option value containing result of applying reduce operator op between all the elements if the collection is nonempty, and None otherwise.

Inherited from
IterableOnceOps
def reduceRight[B >: Char](op: (Char, B) => B): B

Applies a binary operator to all elements of this collection, going right to left.

Applies a binary operator to all elements of this collection, going right to left.

Note: will not terminate for infinite-sized collections.

Note: might return different results for different runs, unless the underlying collection type is ordered or the operator is associative and commutative.

Type Params
B

the result type of the binary operator.

Value Params
op

the binary operator.

Returns

the result of inserting op between consecutive elements of this collection, going right to left: op(x1, op(x2, ..., op(xn-1, xn)...)) where x1, ..., xn are the elements of this collection.

Throws
UnsupportedOperationException

if this collection is empty.

Inherited from
IterableOnceOps
def reduceRightOption[B >: Char](op: (Char, B) => B): Option[B]

Optionally applies a binary operator to all elements of this collection, going right to left.

Optionally applies a binary operator to all elements of this collection, going right to left.

Note: will not terminate for infinite-sized collections.

Note: might return different results for different runs, unless the underlying collection type is ordered or the operator is associative and commutative.

Type Params
B

the result type of the binary operator.

Value Params
op

the binary operator.

Returns

an option value containing the result of reduceRight(op) if this collection is nonempty, None otherwise.

Inherited from
IterableOnceOps
def report(pos: Int, msg: String, out: PrintStream): Unit
Value Params
msg

the error message to report

out

PrintStream to use

pos

the source position (line/column)

Inherited from
Source
def reportError(pos: Int, msg: String, out: PrintStream): Unit

Reports an error message to the output stream out.

Reports an error message to the output stream out.

Value Params
msg

the error message to report

out

PrintStream to use (optional: defaults to Console.err)

pos

the source position (line/column)

Inherited from
Source
def reportWarning(pos: Int, msg: String, out: PrintStream): Unit
Value Params
msg

the warning message to report

out

PrintStream to use (optional: defaults to Console.out)

pos

the source position (line/column)

Inherited from
Source
def reset(): Source

The reset() method creates a fresh copy of this Source.

The reset() method creates a fresh copy of this Source.

Inherited from
Source
protected def reversed: Iterable[Char]
Inherited from
IterableOnceOps
def sameElements[B >: Char](that: IterableOnce[B]): Boolean

Checks whether corresponding elements of the given iterable collection compare equal (with respect to ==) to elements of this iterator.

Checks whether corresponding elements of the given iterable collection compare equal (with respect to ==) to elements of this iterator.

Type Params
B

the type of the elements of collection that.

Value Params
that

the collection to compare

Returns

true if both collections contain equal elements in the same order, false otherwise.

Inherited from
Iterator
def scanLeft[B](z: B)(op: (B, Char) => B): Iterator[B]
Inherited from
Iterator
def size: Int

The size of this collection.

The size of this collection.

Note: will not terminate for infinite-sized collections.

Returns

the number of elements in this collection.

Inherited from
IterableOnceOps
def slice(from: Int, until: Int): Iterator[Char]
Inherited from
Iterator
def sliding[B >: Char](size: Int, step: Int): GroupedIterator[B]

Returns an iterator which presents a "sliding window" view of this iterator.

Returns an iterator which presents a "sliding window" view of this iterator. The first argument is the window size, and the second argument step is how far to advance the window on each iteration. The step defaults to 1.

The returned GroupedIterator can be configured to either pad a partial result to size size or suppress the partial result entirely.

Example usages:

// Returns List(ArraySeq(1, 2, 3), ArraySeq(2, 3, 4), ArraySeq(3, 4, 5))
(1 to 5).iterator.sliding(3).toList
// Returns List(ArraySeq(1, 2, 3, 4), ArraySeq(4, 5))
(1 to 5).iterator.sliding(4, 3).toList
// Returns List(ArraySeq(1, 2, 3, 4))
(1 to 5).iterator.sliding(4, 3).withPartial(false).toList
// Returns List(ArraySeq(1, 2, 3, 4), ArraySeq(4, 5, 20, 25))
// Illustrating that withPadding's argument is by-name.
val it2 = Iterator.iterate(20)(_ + 5)
(1 to 5).iterator.sliding(4, 3).withPadding(it2.next).toList
Value Params
size

the number of elements per group

step

the distance between the first elements of successive groups

Returns

A GroupedIterator producing Seq[B]s of size size, except the last element (which may be the only element) will be truncated if there are fewer than size elements remaining to be grouped. This behavior can be configured.

Note

Reuse: After calling this method, one should discard the iterator it was called on, and use only the iterator that was returned. Using the old iterator is undefined, subject to change, and may result in changes to the new iterator as well.

Inherited from
Iterator

Splits this iterator into a prefix/suffix pair according to a predicate.

Splits this iterator into a prefix/suffix pair according to a predicate.

Note: c span p is equivalent to (but possibly more efficient than) (c takeWhile p, c dropWhile p), provided the evaluation of the predicate p does not cause any side-effects.

Note: might return different results for different runs, unless the underlying collection type is ordered.

Note

Reuse: After calling this method, one should discard the iterator it was called on, and use only the iterators that were returned. Using the old iterator is undefined, subject to change, and may result in changes to the new iterators as well.

Inherited from
Iterator

Splits this collection into a prefix/suffix pair at a given position.

Splits this collection into a prefix/suffix pair at a given position.

Note: c splitAt n is equivalent to (but possibly more efficient than) (c take n, c drop n).

Note: might return different results for different runs, unless the underlying collection type is ordered.

Value Params
n

the position at which to split.

Returns

a pair of collections consisting of the first n elements of this collection, and the other elements.

Inherited from
IterableOnceOps
def stepper[S <: Stepper[_]](shape: StepperShape[Char, S]): S

Returns a scala.collection.Stepper for the elements of this collection.

Returns a scala.collection.Stepper for the elements of this collection.

The Stepper enables creating a Java stream to operate on the collection, see scala.jdk.StreamConverters. For collections holding primitive values, the Stepper can be used as an iterator which doesn't box the elements.

The implicit scala.collection.StepperShape parameter defines the resulting Stepper type according to the element type of this collection.

Note that this method is overridden in subclasses and the return type is refined to S with EfficientSplit, for example scala.collection.IndexedSeqOps.stepper. For Steppers marked with scala.collection.Stepper.EfficientSplit, the converters in scala.jdk.StreamConverters allow creating parallel streams, whereas bare Steppers can be converted only to sequential streams.

Inherited from
IterableOnce
def sum[B >: Char](num: Numeric[B]): B

Sums up the elements of this collection.

Sums up the elements of this collection.

Note: will not terminate for infinite-sized collections.

Type Params
B

the result type of the + operator.

Value Params
num

an implicit parameter defining a set of numeric operations which includes the + operator to be used in forming the sum.

Returns

the sum of all elements of this collection with respect to the + operator in num.

Inherited from
IterableOnceOps
def take(n: Int): Iterator[Char]
Inherited from
Iterator
Inherited from
Iterator
override def tapEach[U](f: Char => U): Iterator[Char]
Definition Classes
Inherited from
Iterator
def to[C1](factory: Factory[Char, C1]): C1

Given a collection factory factory, convert this collection to the appropriate representation for the current element type A.

Given a collection factory factory, convert this collection to the appropriate representation for the current element type A. Example uses:

xs.to(List) xs.to(ArrayBuffer) xs.to(BitSet) // for xs: Iterable[Int]

Inherited from
IterableOnceOps
def toArray[B >: Char](`evidence$1`: ClassTag[B]): Array[B]

Convert collection to array.

Convert collection to array.

Implementation note: DO NOT call Array.from from this method.

Inherited from
IterableOnceOps
final def toBuffer[B >: Char]: Buffer[B]
Inherited from
IterableOnceOps
Inherited from
IterableOnceOps
def toMap[K, V](ev: Char <:< (K, V)): Map[K, V]
Inherited from
IterableOnceOps
def toSeq: Seq[Char]
Returns

This collection as a Seq[A]. This is equivalent to to(Seq) but might be faster.

Inherited from
IterableOnceOps
def toSet[B >: Char]: Set[B]
Inherited from
IterableOnceOps
override def toString: String

Converts this iterator to a string.

Converts this iterator to a string.

Returns

""

Note

Reuse: The iterator remains valid for further use whatever result is returned.

Definition Classes
Iterator -> Any
Inherited from
Iterator
Inherited from
IterableOnceOps
def withClose(f: () => Unit): BufferedSource
Inherited from
Source
Inherited from
Source

Creates an iterator over all the elements of this iterator that satisfy the predicate p.

Creates an iterator over all the elements of this iterator that satisfy the predicate p. The order of the elements is preserved.

Note: withFilter is the same as filter on iterators. It exists so that for-expressions with filters work over iterators.

Value Params
p

the predicate used to test values.

Returns

an iterator which produces those values of this iterator which satisfy the predicate p.

Note

Reuse: After calling this method, one should discard the iterator it was called on, and use only the iterator that was returned. Using the old iterator is undefined, subject to change, and may result in changes to the new iterator as well.

Inherited from
Iterator

Change or disable the positioner.

Change or disable the positioner.

Inherited from
Source
Inherited from
Source
def zip[B](that: IterableOnce[B]): Iterator[(Char, B)]
Inherited from
Iterator
def zipAll[A1 >: Char, B](that: IterableOnce[B], thisElem: A1, thatElem: B): Iterator[(A1, B)]
Inherited from
Iterator
Inherited from
Iterator

Deprecated and Inherited methods

@deprecated("Use foldLeft instead of /:", "2.13.0") @inline
final def /:[B](z: B)(op: (B, Char) => B): B
Deprecated
Inherited from
IterableOnceOps
@deprecated("Use foldRight instead of :\\", "2.13.0") @inline
final def :\[B](z: B)(op: (Char, B) => B): B
Deprecated
Inherited from
IterableOnceOps
@deprecated("`aggregate` is not relevant for sequential collections. Use `foldLeft(z)(seqop)` instead.", "2.13.0")
def aggregate[B](z: => B)(seqop: (B, Char) => B, combop: (B, B) => B): B
Deprecated
Inherited from
IterableOnceOps
@deprecated("Use `dest ++= coll` instead", "2.13.0") @inline
final def copyToBuffer[B >: Char](dest: Buffer[B]): Unit
Deprecated
Inherited from
IterableOnceOps
@deprecated("hasDefiniteSize on Iterator is the same as isEmpty", "2.13.0") @inline
final override def hasDefiniteSize: Boolean
Deprecated
Definition Classes
Inherited from
Iterator
@deprecated("Call scanRight on an Iterable instead.", "2.13.0")
def scanRight[B](z: B)(op: (Char, B) => B): Iterator[B]
Deprecated
Inherited from
Iterator
@deprecated("Iterator.seq always returns the iterator itself", "2.13.0")
Deprecated
Inherited from
Iterator
@deprecated("Use .iterator instead of .toIterator", "2.13.0") @inline
Deprecated
Inherited from
IterableOnceOps
@deprecated("Use .to(LazyList) instead of .toStream", "2.13.0") @inline
final def toStream: Stream[Char]
Deprecated
Inherited from
IterableOnceOps

Concrete fields

override val iter: Iterator[Char]

Inherited fields

description of this source, default empty

description of this source, default empty

Inherited from
Source
var nerrors: Int
Inherited from
Source
Inherited from
Source

Implicits

Implicits

implicit val codec: Codec