node.js ã代表ã¨ãã JavaScript ãç¨ããéåæããã°ã©ãã³ã°ç°å¢ã«ããã¦ã¯ãã³ã¼ãã£ã³ã°ãã¿ã¼ã³ã®ãã¹ããã©ã¯ãã£ã¹ãå ±æããã¦ããããçµæã¨ãã¦å質ã®ä½ãã³ã¼ããå¤ããªãã¨ããåé¡ãããããã«æãã¾ããããã§ãç¹ã«ã¨ã©ã¼å¦çãã©ãæ¸ãã¹ãããæ¢åã®ã©ã¤ãã©ãªã使ãæ¹æ³ãç´¹ä»ãã¦ã¿ããã¨ã«ãã¾ããã ãããªãã§ããããã¡ã¤ã«ã®æåæ°ãè¿ãé¢æ°ãä½ããã¨ãèãã¦ã¿ã¾ããJava ã ã¨ä»¥ä¸ã®ãããªæãã«ãªãã§ãããããcountChars ã¡ã½ããã«æ³¨ç®ããã¨ãã¨ã©ã¼ãä¾å¤ã¨ãã¦æ±ã£ã¦ãã¦ãã¢ã¸ã¥ã©ã¼ãã¤ç°¡æ½ã«ãªã£ã¦ãããã¨ããããã¾ãã class FileCounter { static long countChars(String filename) throws IOException { FileInputStream is = new FileInputStre
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