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rubyで1文字ずつ表示する

下の、motoの値を書き換えるだけなので、簡単です。
前回出した、musicplayerの作り方などの記事でも使っていたのですが、説明を忘れていました。

ruby
        moto = "テスト\n" #これは、テストと表示するプログラムです。
        string = moto
        loop do
        print string.chr
        moto = string.chr
        string.sub!(/#{moto}/,'')
        if string.size == 0
        break
        end
        sleep 0.1
        end        
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