Web Reference: Anytime I see nils in an array I'm working on, I dig into why they exist, and see if I can improve the code generating the array, rather than allow Ruby to waste time and memory generating nils then sifting through the array to remove them later. Jul 23, 2025 · In this article, we will discuss how to remove all nil elements from an array permanently in Ruby. We can remove all nil elements from an array permanently through different methods ranging from using compact! method to delete method with nil argument. Nov 6, 2022 · Introduced in Ruby 2.6, you can use the Array#filter method to only include values that are not nil in the resulting array: This would return a new array excluding all nil values. You may also mutate the original array by using Array#filter! (instead of Array#filter), for example, like so:
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