remove an element from the middle of an array in ruby

To remove an element from the middle of an array in Ruby, you can use the slice! method. This method removes the element or elements specified by a given range, and returns the removed elements.

Here is an example of how to remove the element at index n from an array arr:

main.rb
arr.slice!(n)
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This will remove the element at index n from the array arr in-place, meaning that the original array will be modified.

Alternatively, if you want to remove a range of elements from the array, you can specify a range of indices to remove:

main.rb
arr.slice!(start_index, length)
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This will remove length elements starting at index start_index from the array arr.

Here's an example that removes a single element from the middle of an array:

main.rb
arr = [1, 2, 3, 4, 5]
n = 2
arr.slice!(n)
puts arr.inspect # Output: [1, 2, 4, 5]
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In this example, the element at index 2 (which is 3) is removed from the arr array. After the slice! method is called, the resulting array is [1, 2, 4, 5].