2017网站建设,湘潭哪里做网站,背景网站建设公司,手机做网站空间前言
我们还是以一段关于构造函数的代码作为开端#xff0c;我们以之前银行家的小项目为背景
class Account {constructor(owner, currency, pin) {this.owner owner;this.currency currency;this.pin pin;}
}const ITshare new Account(ITshare, EUR, 21211);
console.…前言
我们还是以一段关于构造函数的代码作为开端我们以之前银行家的小项目为背景
class Account {constructor(owner, currency, pin) {this.owner owner;this.currency currency;this.pin pin;}
}const ITshare new Account(ITshare, EUR, 21211);
console.log(ITshare);● 我们可以设置一个欢迎语
class Account {constructor(owner, currency, pin) {this.owner owner;this.currency currency;this.pin pin;this.locale navigator.language;console.log(欢迎来到你的账户${owner});}
}const ITshare new Account(ITshare, EUR, 21211);
console.log(ITshare);● 但是如果现在我们需要一个存钱和取钱的数组用于记录该怎么去做呢当然我们可以用传统的方法
class Account {constructor(owner, currency, pin) {this.owner owner;this.currency currency;this.pin pin;this.movements [];this.locale navigator.language;console.log(欢迎来到你的账户${owner});}
}const ITshare new Account(ITshare, EUR, 21211);
ITshare.movements.push(250);
ITshare.movements.push(-156);
console.log(ITshare);● 上面未必显得有点不高级了可以像下面这样的写
class Account {constructor(owner, currency, pin) {this.owner owner;this.currency currency;this.pin pin;this.movements [];this.locale navigator.language;console.log(欢迎来到你的账户${owner});}deposit(val) {this.movements.push(val);}withraw(val) {this.deposit(-val);}
}const ITshare new Account(ITshare, EUR, 21211);
ITshare.deposit(250);
ITshare.withraw(120);
console.log(ITshare);上面的取钱和存钱的操作就属于公共接口所有人在存钱或者取钱的时候都是调用同样的方法
● 我们可以像之前那样实现一个贷款的样例
class Account {constructor(owner, currency, pin) {this.owner owner;this.currency currency;this.pin pin;this.movements [];this.locale navigator.language;console.log(欢迎来到你的账户${owner});}deposit(val) {this.movements.push(val);}withraw(val) {this.deposit(-val);}approveLoan(val) {return true;}requestLoan(val) {if (this.approveLoan(val)) {this.deposit(val);console.log(恭喜你贷款成功);}}
}const ITshare new Account(ITshare, EUR, 21211);
ITshare.deposit(250);
ITshare.withraw(120);
ITshare.requestLoan(1000);
console.log(ITshare);上面的方法中approveLoan方法只有被requestLoan他才有效所以在开发中数据封装和数据隐私非常非常重要后面的话我们的文章再分享学习
