Laravelで多次元配列を1次元化するflatten()が便利だった.
連想配列の値のみを収集して1次元配列にしてくれる。
$ ./vendor/bin/sail artisan tinker
Psy Shell v0.11.1 (PHP 8.1.2 — cli) by Justin Hileman
>>> $collection = collect([ 'hoge' => [1, 2, 3],
... 'fuga' => 'aiueo',
... 'foo' => 1,
... 'bar' => null
... ]);
=> Illuminate\Support\Collection {#3529
all: [
"hoge" => [
1,
2,
3,
],
"fuga" => "aiueo",
"foo" => 1,
"bar" => null,
],
}
>>> $collection->flatten();
=> Illuminate\Support\Collection {#3525
all: [
1,
2,
3,
"aiueo",
1,
null,
],
}
