- org.codehaus.groovy.runtime.ComposedClosure
-
A wrapper for Closure to support composition.
Normally used only internally through the rightShift()
and
leftShift()
methods on Closure
.
Typical usages:
def twice = { a -> a * 2 }
def inc = { b -> b + 1 }
def f = { x -> twice(inc(x)) } // longhand
def g = inc >> twice
def h = twice << inc
assert f(10) == 22
assert g(10) == 22
assert h(10) == 22
def s2c = { it.chars[0] }
def p = Integer.&toHexString >> s2c >> Character.&toUpperCase
assert p(15) == 'F'
def multiply = { a, b -> a * b }
def identity = { a -> [a, a] }
def sq = identity >> multiply
assert (1..5).collect{ sq(it) } == [1, 4, 9, 16, 25]
def add3 = { a, b, c -> a + b + c }
def add2plus10 = add3.curry(10)
def multBoth = { a, b, c -> [a*c, b*c] }
def twiceBoth = multBoth.rcurry(2)
def twiceBothPlus10 = twiceBoth >> add2plus10
assert twiceBothPlus10(5, 10) == 40
- Authors:
- Paul King
-
-
Methods Summary
-
Inherited Methods Summary
Inherited Methods
Methods inherited from class |
Name |
class Closure |
asWritable, call, call, call, clone, curry, curry, dehydrate, getDelegate, getDirective, getMaximumNumberOfParameters, getOwner, getParameterTypes, getProperty, getResolveStrategy, getThisObject, isCase, leftShift, leftShift, memoize, memoizeAtLeast, memoizeAtMost, memoizeBetween, ncurry, ncurry, rcurry, rcurry, rehydrate, rightShift, run, setDelegate, setDirective, setProperty, setResolveStrategy, throwRuntimeException, trampoline, trampoline |
class GroovyObjectSupport |
getMetaClass, getProperty, invokeMethod, setMetaClass, setProperty |
class Object |
wait, wait, wait, equals, toString, hashCode, getClass, notify, notifyAll |
-
-
Method Detail
-
public Class[] getParameterTypes()
-
public int getResolveStrategy()
-
public void setDelegate(Object delegate)
-
public void setResolveStrategy(int resolveStrategy)
Copyright © 2003-2018 The Apache Software Foundation. All rights reserved.