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Array.filter_with_index

filter_with_indexpredicate

Group: Selections

Documentation​

Selects all elements of this array which satisfy a predicate.

Arguments​

  • predicate: A function that takes an index and a list element and returns a boolean value that says whether that value should be included in the result.

Examples​

Selecting all elements which are equal to their position in the array.​

      [0, 10, 2, 2].to_array.filter (==) == [0, 2].to_array