ActiveSupport | multiple_of?

概要

multiple_of?

詳細

multiple_of? について

multiple_of?

数値が引数の数値の倍数であるか判定する

サンプル

# encoding: utf-8
require 'active_support/core_ext/integer/multiple'
require 'tbpgr_utils'

bulk_puts_eval binding, <<-EOS
1.multiple_of? 1
2.multiple_of? 1
2.multiple_of? 2
3.multiple_of? 2
4.multiple_of? 2
EOS

__END__
・下記はTbpgrUtils gemの機能
bulk_puts_eval

https://rubygems.org/gems/tbpgr_utils
https://github.com/tbpgr/tbpgr_utils

出力

1.multiple_of? 1 # => true
2.multiple_of? 1 # => true
2.multiple_of? 2 # => true
3.multiple_of? 2 # => false
4.multiple_of? 2 # => true

参照

http://guides.rubyonrails.org/active_support_core_extensions.html#multiple-of-questionmark
https://github.com/rails/rails/blob/master/activesupport/lib/active_support/core_ext/integer/multiple.rb