So instead of writing this: Array.prototype. The length property does not necessarily create 'empty' slots, ECMA-262 does not specify implementation so developers are free to allocate memory or not, or create empty slots, or not. Also, this is going to allow us to compare how our versions fare against the original methods. 1 Arrays are just Objects with a special length property and inherited array methods. Note that when working on our implementations, we won’t be overriding existing methods, since that is never a good idea (some packages we import may be dependent on it). There is no better way to learn than to take things apart and put them back together. Here, however, we won’t be using these instead, we’ll define our own versions starting from the simple method and build up on top of these until we get them all. Remove an element from an array with a for loop and push. They are all defined in the Array.prototype object. That means it extends the behaviour of JS object in some way. JS arrays serve for storing the multiple values in a list. To use a method on a given array, we type. If you work with Typescript (TS), there’s an interesting and more bullet proof way to check for empty arrays too.
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