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In computer programming, duck typing is an application of the duck testâ"If it walks like a duck and it quacks like a duck, then it must be a duck"âto determine whether an object can be used for a particular purpose. With nominative typing, an object is of a given type if it is declared as such (or if a type's association with the object is inferred through mechanisms such as object inheritance).
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æ¡ä»¶æ¼ç®åã¨ã¯ï¼ æ¡ä»¶æ¼ç®åã¨ã¯ãããè¦ãã¢ã¬ã®ãã¨ã§ããã bool b = true; string s = b ? "ç" : "å½" ; // ããã§åºã¦ãã ? 㨠: ãæ¡ä»¶æ¼ç®å // ? ã®å·¦ãçã§ããã° : ã®å·¦ãè¿ãã // ? ã®å·¦ãå½ã§ããã° : ã®å³ãè¿ãã // ãã®å ´å b ã true ãªã®ã§ (b ? "ç" : "å½") 㯠"ç" ãè¿ã å³çµåã¨å·¦çµå ãã§ãå³çµåãå·¦çµåã¨ããã®ã¯ãåãåªå åº¦ã®æ¼ç®åã並ãã å ´åããããå³ããã¾ã¨ãã¦ãããå·¦ããã¾ã¨ãã¦ãããã¨è¨ãã«ã¼ã«ã®è©±ã§ããã // å·¦çµåã®ä¾ int sub = 10 - a - b - c; // å·¦çµåãªã®ã§ã以ä¸ã®é çªã§è§£éããã // int sub = (((10 - a) - b) - c); // å³çµåã®ä¾ x = y = z = 10; // å³çµåãªã®ã§ã以ä¸ã®é çªã§è§£
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