JavaScript Algorithm Technic & Optimization

arrayToSet

const arrayToSet = (arr) => new Set(arr);

console.log(arrayToSet([1, 2, 2, 3]));
// Set { 1, 2, 3 }

setToArray

const setToArray = (set) => Array.from(set);

console.log(setToArray(new Set([1, 2, 2, 3])));
// [1, 2, 3]

filterUniqArray

const filterUniqArray = (arr) => Array.from(new Set(arr));

console.log(filterUniqArray([1, 2, 2, 3]));
// [1, 2, 3]

integer string to numbers

function digitize(n) {
  return String(n).split('').map(Number)
}

Why ['1', '7', '11'].map(parseInt) returns [1, NaN, 3] in Javascript

Why ['1', '7', '11'].map(parseInt) returns [1, NaN, 3] in JavascriptMedium

string to char array

// string to char array

// classic
const str = 'abcde';
console.log(str.split(''));
// [ 'a', 'b', 'c', 'd', 'e' ]

// tricky
console.log([...str]);
// [ 'a', 'b', 'c', 'd', 'e' ]