雑すぎる備忘録
余談
今日から rubykaigi2019
が始まった。生まれて初めて experimental
な安定前のバージョンを使う。rubyが永遠に世界で人気であればいいのに。日本万歳
* 2.5.3
in
!!!!!!!!!!!!!!
$ rbenv versions
system
2.5.0
2.5.1
* 2.5.3 (set by /Users/ryosukehujisawa/Desktop/sns-lang/.ruby-version)
2.7.0-dev
$ ruby /Users/ryosukehujisawa/Desktop/test.rb
/Users/rh/Desktop/test.rb:2: syntax error, unexpected keyword_in, expecting keyword_when
in 0 then true
^~
2.7.0-dev
$ rbenv versions
system
2.5.0
2.5.1
2.5.3
* 2.7.0-dev (set by /Users/rh/.rbenv/version)
$ ruby /Users/rh/Desktop/test.rb
/Users/rh/Desktop/test.rb:1: warning: Pattern matching is experimental, and the behavior may change in future versions of Ruby!
実装
case 0
in 0 then true
else false
end