Array.isArray() , unsurprisingly, checks whether its argument is an array. This weeds out values like null , undefined and anything else that ... ... <看更多>

This is the fastest way to empty an array: a = [];. This code assigned the array a to a new empty array. It works perfectly if you do not have any references to ... ... <看更多>

In this video, we look at how to create an empty Array in JS. ... <看更多>

For arrays I wouldn't either. Even JS doesn't treat [] as a falsified value. So what is left is for boolean and there I am open to add this. ... <看更多>

In practice it will depend on the JavaScript executor how it handles it. The check should effectively be done by the forEach as it has to ... ... <看更多>

In this post I will highlight six ES6 Array methods, outlining the ways we may ... So if you have an empty array, it will not add items:. ... <看更多>