javascript create array with repeated values
Array(5).fill(2)
//=> [2, 2, 2, 2, 2]javascript create array with repeated values
Array(5).fill(2)
//=> [2, 2, 2, 2, 2]how to get duplicate values from array in javascript
var input = [1, 2, 3, 1, 3, 1];
var duplicates = input.reduce(function(acc, el, i, arr) {
if (arr.indexOf(el) !== i && acc.indexOf(el) < 0) acc.push(el); return acc;
}, []);
document.write(duplicates); // = 1,3 (actual array == [1, 3])how to get duplicate values from array in javascript
let a = [1, 2, 3, 4, 2, 2, 4, 1, 5, 6]
let b = [...new Set(a.sort().filter((o, i) => o !== undefined && a[i + 1] !== undefined && o === a[i + 1]))]
// b is now [1, 2, 4]Copyright © 2021 Codeinu
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