â [ruby] Rubyã®æ°ãªãã¡ã¬ã³ã¹ããã¥ã¢ã«ãã³ãã³ãã©ã¤ã³ããç°¡åã«å¼ãããã®ãã¼ã«ãæ¸ãã Rubyãªãã¡ã¬ã³ã¹ããã¥ã¢ã«å·æ°è¨ç»(éç§°ããã¾)ã®ãªãã¡ã¬ã³ã¹ããã³ãã³ãã©ã¤ã³ããç°¡åã«å¼ããããã«ããgemãä½ãã¾ããã å¤ãã®äººã¯Webçããchmçã使ã£ã¦ãã¨æãã¾ãããåããã®ãã³ãã³ãã©ã¤ã³ããè¦ããããã«ãªãã¾ãã ã¤ã³ã¹ãã¼ã«æ¹æ³ã¨ãã¯githubã«æ¸ãã¦ã¾ããã $ sudo gem install myrurema $ rurema --init $ rurema Array#length Array#length --- length -> Integer --- size -> Integer é åã®é·ããè¿ãã¾ããé åã空ã®ã¨ã㯠0 ãè¿ãã¾ãã p [1, nil, 3, nil].size #=> 4 ã¨ããæãã§ããååã®ã¿ããã¼ã¿ãã¼ã¹ãæ§ç¯ã

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