How to useeach_with_index in Ruby

Below is the Code:

Ruby
array = ["a", "b", "c"]
array.each_with_index do |element, index|
  puts "Element: #{element}, Index: #{index}"
end

Output
Element: a, Index: 0
Element: b, Index: 1
Element: c, Index: 2

Explanation:

  • The each_with_index method iterates over each element in the array, providing both the element and its index to the block.
  • Within the block, you can perform any desired action using the element and index.

How to map/collect with index in Ruby?

Mapping or collecting elements with their corresponding indices in Ruby is a common requirement in various programming scenarios. Ruby provides several options to suit your needs.

Let’s explore four approaches to map or collect elements with their indices:

Table of Content

  • Approach 1: Using each_with_index
  • Approach 2: Using map.with_index
  • Approach 3: Using Enumerable#each_with_index
  • Approach 4: Using Range#each_with_index

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Approach 1: Using each_with_index

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Approach 2: Using map.with_index

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Approach 3: Using Enumerable#each_with_index

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Approach 4: Using Range#each_with_index

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