Ruby Each Do With Index

If no block is given an enumerator is returned instead.

Ruby each do with index.

Given arguments are passed through to each. Ruby arrays can hold objects such as string integer fixnum hash symbol even other array objects. The ruby method each allows you to go over a list of items without having to keep track of the number of iterations or having to increase some kind of counter. 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. It s the ruby way of doing repeat until done. Calls block with two arguments the item and its index for each item in enum. For a hash you create two elements one for the hash key and one for the value.

Let s look at these in detail. When it comes to doing the same thing over and over again ruby has a few methods you can choose from. But in this article we re going to look at the each method how to use it and what you can do with it. The each iterator returns all the elements of an array or a hash.

When you think about ruby you think oop. 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. Given arguments are passed through to each. In ruby arrays and hashes can be termed collections.

We will be discussing two iterators here each and collect. Iterators return all the elements of a collection one after the other. Syntax collection each do variable code end.