#            
## Overview
We can merge two hashes using the **`merge()` method**. 
When using the `merge()` method:
* Each new entry is added to the end. 
* Each duplicate-key entry's value overwrites the previous value.
## Syntax
```ruby
hash.merge(other_hash)
```
## Parameter(s)
**`other_hash`**: This is the hash we want to merge with the `hash`. They could be one or more.
## Return value
This method returns a new hash object formed by merging `other_hash` into hash `hash`. 
## Example

# create some hashes
h1 = {one: 1, two: 2, three: 3}
h2 = {two:22, three: 33}
h3 = {"foo": 0, "bar": 1}
h4 = {"foo": 1}
h4 = {M:"Mango", A: "Apple", B: "Banana"}
h5 = {C: "Cabbage", P: "Pineapple"}

# merge hashes
puts h1.merge(h2)
puts h3.merge(h4)
puts h4.merge(h5)

## Explanation
* **Lines 2 to 7**: We create some hashes.
* **Lines 10 to 12**: We merge some hashes and their results are printed to the console.

How to merge hashes in Ruby

Merge hashes in Ruby using the merge() method to add or overwrite entries, returning a new hash.