TIL about flattening a JS array

POSTED ON: Aug 15, 2020

There's a nice method for Array called Array.flat, as an argument it needs depth you need to flat (default: 1). But what if you don't know the depth, you need to flatten it all. We just put Infinity as the argument. Also there's a nice flatMap method.

const arrays = [[10], 50, [100, [2000, 3000, [40000]]]];
arrays.flat(Infinity);
// [ 10, 50, 100, 2000, 3000, 40000 ]

via https://dev.to/gigantz/9-javascript-tips-tricks-to-code-like-a-wizard-559i

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