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在面向对象编程中,构造器是一个当新建对象的内存被分配后,用来初始化该对象的一个特殊函数。在 JavaScript 中一切皆对象。 对象构造器是被用来创建特殊类型的对象的,首先它要准备使用的对象,其次在对象初次被创建时,通过接收参数,构造器要用来对成员的属性和方法进行赋值
function Car(model, year, miles) { this.model = model; this.year = year; this.miles = miles; this.toString = function() { return this.model + ' has done ' + this.miles + ' miles'; }; } var civic = new Car('Honda Civic', 2009, 20000); var mondeo = new Car('Ford Mondeo', 2010, 5000); console.log(civic.toString()); // Honda Civic has done 20000 miles console.log(mondeo.toString()); // Ford Mondeo has done 5000 miles
总结:可以理解就是创建一个构造函数
The text was updated successfully, but these errors were encountered:
大佬讲一下v-for的key值作用呗
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在第64题有讲解哈,你可以看下是不是你需要的这种解释
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什么是构造器模式?
在面向对象编程中,构造器是一个当新建对象的内存被分配后,用来初始化该对象的一个特殊函数。在 JavaScript 中一切皆对象。 对象构造器是被用来创建特殊类型的对象的,首先它要准备使用的对象,其次在对象初次被创建时,通过接收参数,构造器要用来对成员的属性和方法进行赋值
栗子
总结:可以理解就是创建一个构造函数
The text was updated successfully, but these errors were encountered: