key?

ハッシュのキーを探す

key?(key)

例に渡された引数と一致しているキーのあるかハッシュを調べる

Checks the hash for a key matching the argument passed in:

irb(main):001:0> hash = ActiveSupport::HashWithIndifferentAccess.new
=> {}
irb(main):002:0> hash['key'] = 'value'
=> "value"
irb(main):003:0> hash.key?(:key)
=> true
irb(main):004:0>  hash.key?('key')
=> true

別名:`include?, has_key?, member?

Also aliased as: include?, has_key?, member?

memberはkey?のエイリアス

member?(key)Link
Alias for: key?