Ruby Each Do With Index

But in this article we re going to look at the each method how to use it and what you can do with it.

Ruby each do with index.

Let s look at these in detail. In ruby arrays and hashes can be termed collections. Iterators return all the elements of a collection one after the other. If no block is given an enumerator is returned instead.

A negative index is assumed relative to the end of the array that is an index of 1 indicates the last element of the array 2 is the next to last element in the array and so on. The ruby each loop. When it comes to doing the same thing over and over again ruby has a few methods you can choose from. It s the ruby way of doing repeat until done.

For a hash you create two elements one for the hash key and one for the value. Like the array these elements are placeholders that are used to pass each key value pair into the code block as ruby loops through the hash. This works exactly like the each method for an array object with one crucial difference. Given arguments are passed through to each.

Syntax collection each do variable code end. Before you can use each you need a collection of items like an array a range or a hash. The each iterator returns all the elements of an array or a hash. Given arguments are passed through to each.

We will be discussing two iterators here each and collect. Ruby arrays are not as rigid as arrays in other languages. Ruby arrays can hold objects such as string integer fixnum hash symbol even other array objects.