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JAVASCRIPT-DIARY

javascript日常练习

实现在一个跟内建函数String()一样的,MyString()方法

实现功能如下:

var a = new MyString('hello')
console.log(a.length) // 5
console.log(a[1]) // e
console.log(a.toString()) // hello
console.log(a.valueOf()) // hello
console.log(a.charAt('1')) // e
console.log(a.concat(' world')) // hello world
console.log(a.slice(0, -1)) // hell
console.log(a.split('e')) // ['h','llo']
console.log(a.reverse()) // olleh

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