Join and flatten arrays into a single master array

Sometimes you get janky-ass data… so you needed to join a bunch of arrays into one single “MASTER” array. Here’s what I did.

var a = [1,2,3]
var b = ["a","b","c"]
var c = ["qwe","dfg","sad"]
var masterArray = a.concat(b, c)

console.log(masterArray) // [1, 2, 3, "a", "b", "c", "qwe", "dfg",