Iteration over Hash Elements

Learn how to iterate over hash elements in Ruby.

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Iteration over hash elements isn’t something we see very often because the main purpose of hash data structure is to add and access elements by a key. However, it’s always good to know how to iterate over elements. We already know how to iterate over arrays:

arr.each do |element|
  # do something with the element

Iteration over key-value pairs also looks similar:

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