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Rubyの基本操作

Last updated at Posted at 2019-10-01

###Rubyファイルを実行する

ディレクトリまで移動して、rubyを頭につけて実行するだけ

~/environment/app (master) $ ruby rubyfile.rb

###ファイル検索

xxxxフォルダ内のテキストファイルを検索して配列に入れる

.rb
filenames = [] 
Dir.glob('xxxx/*.txt') do |file|
  filenames << file
end

###文字列の抜き出しと数値化

.rb
#左から2つの文字列を取出して数値化
pref=filename[1, 2].to_i
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