Using the 'Apply' Function in Javascript

My foray into javascript has not been easy – It’s meant working hard to get out of the mindset of Ruby and forcing myself into the discomfort of a relatively new language. Sort of like switching to French if you speak Spanish – there are many similarities, but relying on your knowledge of one language can actually be a debilitating crutch if you aren’t carefully about what knowledge you transfer over.

I’ve been stuggling with understanding the .apply method in javascript. There isn’t any really analogous function that I’ve found in Ruby (there probably is, but I just don’t know it yet…).

One way .apply is used is to apply the elements in an array as arguments in a function. For example:

```js Math.max(1,2,3,4) //=> 4

//but

Math.max([1,2,3,4]) //=> NaN `` Instead of looping through each of the numbers in the array usingforwe can use theapply` method to take the elements of the array and populate them into the function’s arguments:

Math.max.apply(null, [1,2,3,4]) //=> 4 Javascript is clicking. Slowly.