Call a function: Difference between revisions
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* Call-by-name parameters use a function in first-class context. The function [http://seed7.sourceforge.net/examples/map.htm doMap] from the examples section of the Seed7 homepage uses a given expression to modify the elements of an array:<lang seed7>seq := doMap([](1, 2, 4, 6, 10, 12, 16), x, succ(x));</lang> |
* Call-by-name parameters use a function in first-class context. The function [http://seed7.sourceforge.net/examples/map.htm doMap] from the examples section of the Seed7 homepage uses a given expression to modify the elements of an array:<lang seed7>seq := doMap([](1, 2, 4, 6, 10, 12, 16), x, succ(x));</lang> |
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=={{header|Sidef}}== |
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All functions in Sidef are first-class closures |
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<lang ruby>foo(); # without arguments |
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foo(1, 2); # with two arguments |
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foo(args...); # with a variable number of arguments |
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foo(name: 'Bar', age: 42); # with named arguments |
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var f = foo; # store the function foo inside 'f' |
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var result = f(); # obtain the return value of a function |
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var arr = [1,2,3]; |
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foo(arr); # the arguments are passed by object-reference</lang> |
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Partial application is possible by using a curry function: |
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<lang ruby>func curry(f, *args1) { |
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func (*args2) { |
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f(args1..., args2...); |
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} |
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} |
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func add(a, b) { |
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a + b |
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} |
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var adder = curry(add, 1); |
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say adder(3); #=>4</lang> |
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=={{header|Smalltalk}}== |
=={{header|Smalltalk}}== |
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