JSFiddle - React, Tailwind, and code Playground

by joeterry

JavaScript

var one = [21, 18];
	var two = [
	    [21, 1000],
	    [21, 500],
	    [18, 100],
	    [18, 200]
	];
	var results = [];

	for (var i in one) {
	    results[i] = 0;

	    for (var x in two)
	        if (two[x][0] === one[i]) results[i] = results[i] + two[x][1];

	    results[i] = [one[i], results[i]];
	}

	console.log(results);