Play golf on an array of hashrefs

[very empty]

Dear Monks,
I have an array of hashrefs. Each hash has a key "mykey". Now would like to know if there is a one-line-way to get an array consisting of all values at this common key.

foreach $elem (@array) {
    push @myvalues, $$elem{"mykey"};
}

should do what I want, but  @myvalues is an auxiliary variable I do not want to introduce.

Regards...

[Abigail-II]

map {$_ -> {mykey}} @array

Abigail

[Joost]

@array = map { exists $_->{mykey} ? $_->{mykey} : () } @array;

Update: this also checks for existence of the key, if you don't need to, go for Abigail's solution.

-- 
Joost       downtime n. The period during which a system
            is error-free and immune from user input.

[frankus]

my @myvalues = map {$$elem{mykey} } @array;

--

Brother Frankus.

¤

[mephit]

Actually, the use of $elem in the map won't work, as the OP used $elem as the "alias" variable in the foreach loop. There is no alias in this map.

$> perl -e '@array=({mykey=>foo}, {mykey=>bar}), @out = map{ $$elem{my
+key} } @array; print @out;'
$>

Use $_ instead, as Joost or Abigail suggested.

--

There are 10 kinds of people -- those that understand binary, and those that don't.