Ruby Each Do With Index

In ruby arrays and hashes can be termed collections.

Ruby each do with index.

Ruby arrays can hold objects such as string integer fixnum hash symbol even other array objects. Ruby arrays are not as rigid as arrays in other languages. When you think about ruby you think oop. This works exactly like the each method for an array object with one crucial difference.

We will be discussing two iterators here each and collect. If no block is given an enumerator is returned instead. Iterators return all the elements of a collection one after the other. 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. The each iterator returns all the elements of an array or a hash. Given arguments are passed through to each.

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. For a hash you create two elements one for the hash key and one for the value. 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. Let s look at these in detail.

Syntax collection each do variable code end. Calls block with two arguments the item and its index for each item in enum. Before you can use each you need a collection of items like an array a range or a hash.