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Higher-order functions: Difference between revisions
→{{header|JavaScript}}
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=={{header|JavaScript}}==
<lang
An example with anonymous functions and uses in the core library
<lang javascript>>>> var array = [2, 4, 5, 13, 18, 24, 34, 97];
>>> array
[2, 4, 5, 13, 18, 24, 34, 97]
// return all elements less than 10
>>> array.filter(function (x) { return x < 10 });
[2, 4, 5]
// return all elements less than 30
>>> array.filter(function (x) { return x < 30 });
[2, 4, 5, 13, 18, 24]
// return all elements less than 100
>>> array.filter(function (x) { return x < 100 });
[2, 4, 5, 13, 18, 24, 34, 97]
// multiply each element by 2 and return the new array
>>> array.map(function (x) { return x * 2 });
[4, 8, 10, 26, 36, 48, 68, 194]
// sort the array from smallest to largest
>>> array.sort(function (a, b) { return a > b; });
[2, 4, 5, 13, 18, 24, 34, 97]
// sort the array from largest to smallest
>>> array.sort(function (a, b) { return a < b; });
[97, 34, 24, 18, 13, 5, 4, 2]</lang>
=={{header|Logo}}==
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