Re: Re: Proposal for a new array function

Christian Wenz wrote on 11/02/2016 09:17:

On Mon, Feb 8, 2016 at 09:32 AM, Matthew Setter wrote:

The approach I took was this: return array_keys($arr) !== range(0, count($arr) - 1);

FWIW, this might not work for arrays with missing indices like [0 => 'a', 2 => 'b'] I personally would appreciate a function like you proposed.

This is why the exact specification - and name - of any proposed function needs to be considered carefully. In many cases, what you actually want to verify is "is this a pure list / vector?" in which case you might *want* that array to return false. A naive version of which would be "$arr === array_values($arr)".