SO - 30048388 - JSFiddle - React, Tailwind, and code Playground

SO - 30048388

JavaScript

function flatten() {
    var flat = [];
    for (var i = 0; i < arguments.length; i++) {
        if (arguments[i] instanceof Array) {
            flat.push.apply(flat, flatten.apply(this, arguments[i]));
        } else {
            flat.push(arguments[i]);
        }
    }
    return flat;
}

console.log(flatten(1, [2, 3, [4, 5]]))

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SO - 30048388

JavaScript

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Join the 4+ million users, and keep the JSFiddle dream alive.

Ad-free

Use pre-released features

Fiddle collections

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Console