function Person(name, age, job){ this.name = name; this.age = age; this.job =job; this.sayName = sayName; } function sayName(){ alert(this.name); } var person1 = new Person("wo", 29, "software Engineer"); var person2 = new Person("ta", 27, "Doctor"); alert(person1.sayName == person2.sayName); ? ? ? ? //~~~~~~~~~~~~~~~~~~·true//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~function Person(name, age, job){this.name = name;this.age = age;this.job = job;this.sayName = new Function("alert(this.name)"); // 與聲明函數(shù)在邏輯上是等價(jià)的}var person1 = new Person("wo", 29, "software Engineer"); var person2 = new Person("ta", 27, "Doctor");alert(person1.sayName == person2.sayName); ? ? ? //~~~~~~~~~~~~~~~~~~~~~~~~false
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慕的地6079101
TA貢獻(xiàn)3593條經(jīng)驗(yàn) 獲得超0個(gè)贊
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stone310
TA貢獻(xiàn)361條經(jīng)驗(yàn) 獲得超191個(gè)贊
第一個(gè)sayName是外部函數(shù)，不屬于構(gòu)造函數(shù)內(nèi)，不管它new不new，調(diào)用的都是同一個(gè)外部函數(shù)
