Lodash concat

by findango

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.js"></script>
<script>
function stringify(value) {
	return typeof value === 'object'
    	? JSON.stringify(value, null, 2)
        : value;
}

function log() {
    var args = Array.prototype.slice.call(arguments, 0);
    document.getElementById('output').innerHTML += args.map(stringify).join(" ") + "\n";
}
</script>

<pre id="output"></pre>

JavaScript

const a = [1, 2, 3];

log(_.concat());
log(_.concat(a));
log(_.concat([4, 5]));
log(_.concat(a, [4, 5]));
log(_.concat(1));
log(_.concat(null));
log(_.concat(undefined));
log(_.concat(false));