Collection

Go deep on methods

A method is a way of doing something. If you have completed your module kata and you want some extra practice so you know what to reach for when you want to test something, find something, sort something, or change something, in a particular way, this collection is for you.

It's a work in progress - add your suggestions in the codewars slack channel.

In this collection we are practising using built in methods like...

Methods that return a Boolean

• .includes()
• .some()
• .every()

Methods that re-order

• .reverse()
• .sort()

Or find items

• .find()
• .indexOf()
• .lastIndexOf()

Methods that add or remove an item from an array

• .pop()
• .push()
• .shift()
• .unshift()

Or several items

• .splice()

Or add a whole other array

• .concat()

Or make a copy of just part of it

• .slice()

We'll definitely use this method that turns an array into a string

• .toString()

And a method to turn it back again

• .join()

We might use some methods that work with loops

• .keys()
• .values()
• .entries()

And lots and LOTS of these methods that mean we might not need loops at all

• .filter()
• .map()
• .reduce()