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Course Content


The purpose of creating a Hash in Ruby is to hold two or more pieces of data and retrieve them later by using the keys present in a Hash object.

In Ruby, you can create a hash by using the Hash class. You can also create a hash using keyword arguments.

  • Arrays are ordered collections of values that can be accessed by their index. Hash tables are unordered collections of key-value pairs where the keys are unique.
  • Hash tables are a more efficient way to store data than arrays because they don't require the storage space for duplicate entries.

  • A hash is a data structure that maps keys to values. It is a collection of key-value pairs.
  • When you want to create an array in Ruby, you can use the following syntax:
  • arr = [1, 2, 3]
  • This will generate the array with three elements. If you want to access the value of item number one, you would use arr[1] .

Hash is a collection of unique keys and values in Ruby. Hash is similar to an Array, except that it indexes with arbitrary keys of any object type. The order in which various iterators return keys and their values in Hash is random and will rarely be in the insertion order.

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