implicit object Char extends CharOrdering
- Source
- Ordering.scala
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Type Members
- class OrderingOps extends AnyRef
This inner class defines comparison operators available for
T
.This inner class defines comparison operators available for
T
.- Definition Classes
- Ordering
Value Members
- def compare(x: Char, y: Char): Int
Returns an integer whose sign communicates how x compares to y.
Returns an integer whose sign communicates how x compares to y.
The result sign has the following meaning:
- negative if x < y
- positive if x > y
- zero otherwise (if x == y)
- Definition Classes
- CharOrdering → Ordering → Comparator
- def equiv(x: Char, y: Char): Boolean
Return true if
x
==y
in the ordering.Return true if
x
==y
in the ordering.- Definition Classes
- Ordering → PartialOrdering → Equiv
- def gt(x: Char, y: Char): Boolean
Return true if
x
>y
in the ordering.Return true if
x
>y
in the ordering.- Definition Classes
- Ordering → PartialOrdering
- def gteq(x: Char, y: Char): Boolean
Return true if
x
>=y
in the ordering.Return true if
x
>=y
in the ordering.- Definition Classes
- Ordering → PartialOrdering
- def isReverseOf(other: Ordering[_]): Boolean
Returns whether or not the other ordering is the opposite ordering of this one.
- def lt(x: Char, y: Char): Boolean
Return true if
x
<y
in the ordering.Return true if
x
<y
in the ordering.- Definition Classes
- Ordering → PartialOrdering
- def lteq(x: Char, y: Char): Boolean
Return true if
x
<=y
in the ordering.Return true if
x
<=y
in the ordering.- Definition Classes
- Ordering → PartialOrdering
- def max[U <: Char](x: U, y: U): U
Return
x
ifx
>=y
, otherwisey
.Return
x
ifx
>=y
, otherwisey
.- Definition Classes
- Ordering
- def min[U <: Char](x: U, y: U): U
Return
x
ifx
<=y
, otherwisey
.Return
x
ifx
<=y
, otherwisey
.- Definition Classes
- Ordering
- implicit def mkOrderingOps(lhs: Char): OrderingOps
This implicit method augments
T
with the comparison operators defined inscala.math.Ordering.Ops
.This implicit method augments
T
with the comparison operators defined inscala.math.Ordering.Ops
.- Definition Classes
- Ordering
- def on[U](f: (U) => Char): Ordering[U]
Given f, a function from U into T, creates an Ordering[U] whose compare function is equivalent to:
Given f, a function from U into T, creates an Ordering[U] whose compare function is equivalent to:
def compare(x:U, y:U) = Ordering[T].compare(f(x), f(y))
- Definition Classes
- Ordering
- def orElse(other: Ordering[Char]): Ordering[Char]
Creates an Ordering[T] whose compare function returns the result of this Ordering's compare function, if it is non-zero, or else the result of
other
s compare function.Creates an Ordering[T] whose compare function returns the result of this Ordering's compare function, if it is non-zero, or else the result of
other
s compare function.- other
an Ordering to use if this Ordering returns zero
- Definition Classes
- Ordering
case class Pair(a: Int, b: Int) val pairOrdering = Ordering.by[Pair, Int](_.a) .orElse(Ordering.by[Pair, Int](_.b))
Example: - def orElseBy[S](f: (Char) => S)(implicit ord: Ordering[S]): Ordering[Char]
Given f, a function from T into S, creates an Ordering[T] whose compare function returns the result of this Ordering's compare function, if it is non-zero, or else a result equivalent to:
Given f, a function from T into S, creates an Ordering[T] whose compare function returns the result of this Ordering's compare function, if it is non-zero, or else a result equivalent to:
Ordering[S].compare(f(x), f(y))
This function is equivalent to passing the result of
Ordering.by(f)
toorElse
.- Definition Classes
- Ordering
case class Pair(a: Int, b: Int) val pairOrdering = Ordering.by[Pair, Int](_.a) .orElseBy[Int](_.b)
Example: - def reverse: Ordering[Char]
Return the opposite ordering of this one.
Return the opposite ordering of this one.
Implementations overriding this method MUST override isReverseOf as well if they change the behavior at all (for example, caching does not require overriding it).
- Definition Classes
- Ordering → PartialOrdering
- def reversed(): Comparator[Char]
- Definition Classes
- Comparator
- def thenComparing[U <: Comparable[_ >: U <: AnyRef]](arg0: java.util.function.Function[_ >: Char <: AnyRef, _ <: U]): Comparator[Char]
- Definition Classes
- Comparator
- def thenComparing[U <: AnyRef](arg0: java.util.function.Function[_ >: Char <: AnyRef, _ <: U], arg1: Comparator[_ >: U <: AnyRef]): Comparator[Char]
- Definition Classes
- Comparator
- def thenComparing(arg0: Comparator[_ >: Char <: AnyRef]): Comparator[Char]
- Definition Classes
- Comparator
- def thenComparingDouble(arg0: ToDoubleFunction[_ >: Char <: AnyRef]): Comparator[Char]
- Definition Classes
- Comparator
- def thenComparingInt(arg0: ToIntFunction[_ >: Char <: AnyRef]): Comparator[Char]
- Definition Classes
- Comparator
- def thenComparingLong(arg0: ToLongFunction[_ >: Char <: AnyRef]): Comparator[Char]
- Definition Classes
- Comparator
- def tryCompare(x: Char, y: Char): Some[Int]
Returns whether a comparison between
x
andy
is defined, and if so the result ofcompare(x, y)
.Returns whether a comparison between
x
andy
is defined, and if so the result ofcompare(x, y)
.- Definition Classes
- Ordering → PartialOrdering
This is the documentation for the Scala standard library.
Package structure
The scala package contains core types like
Int
,Float
,Array
orOption
which are accessible in all Scala compilation units without explicit qualification or imports.Notable packages include:
scala.collection
and its sub-packages contain Scala's collections frameworkscala.collection.immutable
- Immutable, sequential data-structures such asVector
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,HashMap
orHashSet
scala.collection.mutable
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,StringBuilder
,HashMap
orHashSet
scala.collection.concurrent
- Mutable, concurrent data-structures such asTrieMap
scala.concurrent
- Primitives for concurrent programming such asFutures
andPromises
scala.io
- Input and output operationsscala.math
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andBigDecimal
scala.sys
- Interaction with other processes and the operating systemscala.util.matching
- Regular expressionsOther packages exist. See the complete list on the right.
Additional parts of the standard library are shipped as separate libraries. These include:
scala.reflect
- Scala's reflection API (scala-reflect.jar)scala.xml
- XML parsing, manipulation, and serialization (scala-xml.jar)scala.collection.parallel
- Parallel collections (scala-parallel-collections.jar)scala.util.parsing
- Parser combinators (scala-parser-combinators.jar)scala.swing
- A convenient wrapper around Java's GUI framework called Swing (scala-swing.jar)Automatic imports
Identifiers in the scala package and the
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is an alias forjava.lang.String
.