Entries from 2015-02-23 to 1 day
Hashで要素の数を取得してみる Hash#lengthとHash#size favorites_language = { bob: 'Ruby', jone: 'Ruby', tiger: 'Perl' } favorites_language.length #=> 3 favorites_language.size #=> 3 Enumerable#count favorites_language = { bob: 'Ruby', jone: …