I have a Map such as:
$m = Map {
'sort' => 'created',
'order' => 'desc',
}
I want to turn that into a string:
'sort:created order:desc'
I can do this with arrays as explained in this SO answer:
implode(' ', array_map(($k, $v) ==> $k.':'.$v, array_keys($m), $m))
I've read the documentation of Map::items and tried:
$m->items()->map(($key, $value) ==> print($key))
But this prints nothing.
I'm looking for a oneliner like with the arrays, no loops.
2 Answers
map()'s parameter is a function that only takes one argument; if you run the typechecker, it will tell you this:
test.php:9:20,20: Invalid argument (Typing[4039])
/tmp/hh_server/hhi_1ebd4af3/hhi/interfaces.hhi:363:27,44: Number of arguments doesn't match
test.php:9:20,20: Because of this definition
What you want is mapWithKey() :
$m->mapWithKey(($key, $value) ==> print($key));
You can also use exactly the same code you were using for arrays:
Use:
implode(' ', $m->mapWithKey(($k, $v) ==> $k.':'.$v))
