On lundi 13 juin 2022 12:28:17 CEST Robert Landers wrote:
> From a maintainer and code review aspect, I prefer the longer syntax
> because it is 100% clear on which variables are being closed over and
> utilized in the anonymous function. fn($x) => $x + $y is pretty clear
> that $y is being pulled in from an outer scope but if you start
> getting into longer ones, it can get non-obvious pretty quickly...
>
> $func = fn($x) {
> $y[] = $x;
> // do some stuff
> return $y;
> }
>
> If $y is pulled from the outside scope, it may or may not be
> intentional but hopefully, it is an array. If anyone uses the name $y
> outside the lambda, this code may subtly break.
This is true for any function that uses the array-append operator on an
undefined variable.
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