Ruby ハッシュ(Hash)のキーを配列に変換する
環境
Windows10 Home 64bit
ruby 3.1.2p20
構文
hash=対象のハッシュ
result = hash.keys
keysメソッドは、呼び出したハッシュ(Hash)のキー(key)を配列(array)に変換します。
使用例
numbers = {
"on" => 1,
"bt" => 2,
"ce" => 3,
"mr" => 4,
"fe" => 5,
}
result = numbers.keys
p result
numbers = {
"on" => 1,
"bt" => 2,
"ce" => 3,
"mr" => 4,
"fe" => 5,
}
result = numbers.keys
p result
numbers = {
"on" => 1,
"bt" => 2,
"ce" => 3,
"mr" => 4,
"fe" => 5,
}
result = numbers.keys
p result
実行結果
[“on", “bt", “ce", “mr", “fe"]