counting duplicate values javascript
var counts = {};
your_array.forEach(function(x) { counts[x] = (counts[x] || 0)+1; });counting duplicate values javascript
var counts = {};
your_array.forEach(function(x) { counts[x] = (counts[x] || 0)+1; });how to count duplicates in an array javascript
arr.reduce((b,c)=>((b[b.findIndex(d=>d.el===c)]||b[b.push({el:c,count:0})-1]).count++,b),[]);Copyright © 2021 Codeinu
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