ary.delete_at(index) รข obj or nil
Instance Public methods
Deletes the element at the specified index, returning that
element, or nil if the index is out of range.
See also #slice!
a = ["ant", "bat", "cat", "dog"] a.delete_at(2) #=> "cat" a #=> ["ant", "bat", "dog"] a.delete_at(99) #=> nil
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