Ruby Each Do With Index

The each iterator returns all the elements of an array or a hash.

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. If no block is given an enumerator is returned instead. In ruby arrays and hashes can be termed collections.

The ruby each loop. Ruby arrays are not as rigid as arrays in other languages. But in this article we re going to look at the each method how to use it and what you can do with it. We will be discussing two iterators here each and collect.

For a hash you create two elements one for the hash key and one for the value. Syntax collection each do variable code end. 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.

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. Iterators return all the elements of a collection one after the other. Calls block with two arguments the item and its index for each item in enum. Given arguments are passed through to each.

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. Let s look at these in detail.