When you want to remove `nil` elements from a Ruby array, you can use two methods: `compact` or `compact!`. They both remove `nil` elements, but `compact!` removes them permanently.

In this shot, we will be talking about the `compact!` method. This method is used to remove every `nil` element in an array permanently.


# Syntax
```ruby
array.compact!
```
# Parameters
This method does not take any parameters. It only needs an array to call the method.

# Return Value
This method returns the original array with all `nil` values removed. If nothing is removed, then `nil` or nothing is returned.


# Code Example
In the code example below, the use of `compact!` is demonstrated. With the use of this method, all `nil` values are removed.

# create arrays
arr1 = [1, nil, 2, 3, nil]
arr2 = ["a", "b", "c"]
arr3 = [true, false, nil]
arr4 = ["nil", nil, "true", "false"]

# remove nil values
arr1.compact!
arr2.compact!
arr3.compact!
arr4.compact!

# print the modified arrays
puts "#{arr1}"
puts "#{arr2}"
puts "#{arr3}"
puts "#{arr4}"

How to remove all nil elements from an array in Ruby permanently

Use `compact!` in Ruby to permanently remove all `nil` elements from an array.