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Javascript Higher order Function Cheatsheet

Chetan Nada answered on September 24, 2022 Popularity 3/10 Helpfulness 2/10

answer Javascript Higher order Function Cheatsheet

Javascript Higher order Function Cheatsheet

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[1, 2, 3, 4, 5].map(item => item * 2); 
// [ 2, 4, 6, 8, 10 ] (returns a new array)
[1, 2, 3, 4, 5].filter(item => item % 2 === 0); 
// [ 2 , 4 ] (returns new array if condition is satisfies)
[1, 2, 3, 4, 5].some(item => item > 3); 
// true (returns a Boolean value)
[1, 2, 3, 4, 5].every(item => item > 2); 
// false (returns a Boolean value)
[1, 2, 3, 4, 5].find(item => item > 2); 
// 3 (returns the first element in the provided array that satisfies the condition)
[1, 2, 3, 4, 5].findIndex(item => item > 2); 
// 2 (returns the index of the first element in an array that satisfies the condition)
[1, 2, 3, 4, 5].reduce((acc, curr) => acc + curr ,0) ; 
// 15 (returns a single value)
[5, 2, 1, 4, 3].sort((a, b) => a - b); 
// [ 1, 2, 3, 4, 5 ] (returns the reference to the same array)
[1, 2, 3, 4, 5].forEach(item => { console.log(item) }); 
// 1 2 3 4 5 (executes each item of an Array and always returns the value undefined)

Popularity 3/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: function javascript

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Contributed on Sep 24 2022

Chetan Nada

0 Answers Avg Quality 2/10

Javascript Higher order Function Cheatsheet

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