对数组对象方法的重写练习
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>Title</title></head><body><script>function Marry(){this.length=arguments.length;for (var i=0;i<arguments.length;i++){this[i]=arguments[i];}this.pop=function (){var popData=this[this.length-1];delete this[this.length-1];this.length --;return popData;}this.push = function (){for (i=0;i<arguments.length;i++){this[this.length]=arguments[i];this.length++}return this.length;}this.shift =function (){var shiftData=this[0];delete this[0];this.length--;for (var i=0;i<this.length;i++){this[i] = this[i+1];}delete this[this.length];return shiftData;}this.unshift = function (){var sum =this.length +arguments.length;for (i=sum-1;i>= arguments.length;i--){this[i]=this[i-arguments.length];}for (i=0;i<arguments.length;i++){this[i] =arguments[i];this.length++;}return this.length}this.MtoString = function (){var result = '';for (i=0;i<this.length-1;i++){result = result +this[i]+',';}result+=this[i];return result;}}arr=new Marry('zhangsan','lisi','wangwu','maqi');console.log(arr.length);console.log(arr);document.write(arr[0]);console.log(arr.pop());console.log(arr.length);console.log(arr);console.log(arr.push('tt','wqwd','asdasd'));console.log(arr.push('yu'));console.log(arr);//console.log(arr);console.log(arr.shift());console.log(arr);console.log(arr.unshift('tuyi','nmb','hujing'));console.log(arr);console.log(arr.MtoString());</script></body></html>
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