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Optimization of arrayUtils.js common function to use less memory and run faster

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ricardodoberstein 2022-05-13 19:33:29 -03:00
parent 44710ab4af
commit 18e56f1ed8
1 changed files with 12 additions and 3 deletions
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15
utils/arrayUtils.js
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@ -6,10 +6,19 @@ function last(array) {
return array[array.length - 1];
}
// return array of values common for both array a and array b
/**
* Return common elements between two arrays.
* @param {*} a array of any type.
* @param {*} b array of any type.
* @returns Array of common elements between A and B.
* @example
* const a = [1, 2, 3, 4];
* const b = [1, 3, 6, 7];
* const result = common(a, b);
* console.log(result); // => [1, 3];
*/
function common(a, b) {
const setB = new Set(b);
return [...new Set(a)].filter(a => setB.has(a));
return a.filter(element => b.includes(element));
}
function unique(array) {