How to Merge Two Maps in Ruby - Step by Step Examples

How to Merge Two Maps in Ruby ?

Answer

To merge two hashes in Ruby, you can use the merge method to combine the contents of both hashes into a new hash. This method provides a straightforward way to merge hashes.

✐ Examples

1 Merging Two Hashes Using merge Method

We can merge two hashes in Ruby using the merge method, which creates a new hash that includes all key-value pairs from both hashes.

For example,

We start by declaring and initializing two hashes named hash1 and hash2 with some key-value pairs. In this example, both hashes have string keys and integer values.
We use the merge method to combine the contents of hash1 and hash2 into a new hash named merged_hash.
We print the merged hash to the console using the puts function to verify the merge.

Ruby Program

hash1 = { 'one' => 1, 'two' => 2 }
hash2 = { 'three' => 3, 'four' => 4 }

# Merge the hashes using the merge method
merged_hash = hash1.merge(hash2)

# Print the merged hash
puts "Merged Hash: #{merged_hash}"

Output

Merged Hash: {"one"=>1, "two"=>2, "three"=>3, "four"=>4}

2 Merging Two Hashes with Overlapping Keys Using merge Method

We can merge two hashes in Ruby and handle overlapping keys using the merge method. If a key exists in both hashes, the value from the second hash will overwrite the value in the first hash.

For example,

We start by declaring and initializing two hashes named hash1 and hash2 with some key-value pairs. In this example, both hashes have string keys and integer values, and there is an overlapping key.
We use the merge method to combine the contents of hash1 and hash2 into a new hash named merged_hash. The value from hash2 will overwrite the value from hash1 for overlapping keys.
We print the merged hash to the console using the puts function to verify the merge.

Ruby Program

hash1 = { 'one' => 1, 'two' => 2 }
hash2 = { 'two' => 22, 'three' => 3 }

# Merge the hashes using the merge method
merged_hash = hash1.merge(hash2)

# Print the merged hash
puts "Merged Hash: #{merged_hash}"

Output

Merged Hash: {"one"=>1, "two"=>22, "three"=>3}

3 Merging Two Hashes Using merge! Method

We can also merge two hashes in Ruby using the merge! method, which modifies the original hash by adding all key-value pairs from the second hash.

For example,

We start by declaring and initializing two hashes named hash1 and hash2 with some key-value pairs. In this example, both hashes have string keys and integer values.
We use the merge! method to add all key-value pairs from hash2 to hash1.
We print the merged hash to the console using the puts function to verify the merge.

Ruby Program

hash1 = { 'one' => 1, 'two' => 2 }
hash2 = { 'three' => 3, 'four' => 4 }

# Merge hash2 into hash1 using merge!
hash1.merge!(hash2)

# Print the merged hash
puts "Merged Hash: #{hash1}"

Output

Merged Hash: {"one"=>1, "two"=>2, "three"=>3, "four"=>4}

Summary

In this tutorial, we learned How to Merge Two Maps in Ruby language with well detailed examples.

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How to Merge Two Maps in Ruby - Step by Step Examples