functionfn2(){this.a=3;this.b=10;}fn2();//因为直接调用函数this就是window，//因此，这里等于给window增加属性a和b。//那么window的属性其实就是变量,因此实际上是增加变量a和bconsole.log(a,b);//3,10varobj={};fn2.call(obj);//这里将obj带入函数后替代函数中this
console.log(a); Function.prototype.method=function(name,func){this.prototype[name] =func;returnthis; } Array.method('splice',function(start,deleteCount){varmax =Math.max, min=Math.min, delta, element, insertCount= max(arguments.length - 2,0);//除了start和deleteCount两个参数外,其他参数的长...
function splice(arr,start,count){ var arr1 = []; //将参数转成数字 start=Number(start); count=Number(count); //如果第一个参数为空,则直接返回空数组arr1 if(isNaN(start)) return arr1; //如果第一个参数是负数,则让它变成正着数的下标 if(start<0) start+=arr.length; //如果第二个参数...
react.js中render的return的坑 demo代码: var HelloComponent=React.createClass({ render:function(){ return Hello World} }); ReactDOM.render( <HelloComponent... nuxt.js框架中 audio标签的坑 一、前言 上星期接到一个需求,业主说要在移动端的考试系统中弄一个背景音乐上去,让人听着做题更舒服,并...
If the user is in the array, I need you to delete it and if it's not there I'll add it. Is there a function that gets this?. Thanks for the ...Go back to previous page if same domain I need to create a button to go to the previous page if the last page visited was in...
app = new Vue({ el: "#app", data: { objects: ["A", "B", "C", "D"], dataList: [ { code: "001", name: "test01" }, { code: "002", name: "test02" }, ], }, computed: {}, methods: { getPush: function () { //1.数组添加push() let objectItem = "1"; this....
functiondeepClone(source){// 判断复制的目标是数组还是对象lettargetObj=source.constructor===Array?[]:{};if(source&&typeofsource==="object"){// 遍历目标for(letkeyinsource){if(source.hasOwnProperty(key)){// 如果值是对象,就递归一下targetObj[key]=deepClone(source[key]);}}}else{targetObj=...
"shift", getFunction("shift", ArrayShift), "unshift", getFunction("unshift", ArrayUnshift, 1), "slice", getFunction("slice", ArraySlice, 2), "splice", getFunction("splice", ArraySplice, 2), "sort", getFunction("sort", ArraySort), ...
sort(orderfunction):按指定的参数对数组进行排序 var a = [1,2,3,4,5]; var b = a.sort(); //a:[1,2,3,4,5] b:[1,2,3,4,5] slice(start,end):返回从原数组中指定开始下标到结束下标之间的项组成的新数组 var a = [1,2,3,4,5]; ...
2019-12-24 15:06 − 函数如下: 1 create or replace FUNCTION fn_rme_split(p_str IN VARCHAR2, 2 p_delimiter IN VARCHAR2) 3 RETURN rme_split 4 PIPELI... 咸咸海风 0 2103 go语言基础—数组与slice 2019-12-19 20:38 − [TOC] # 1、声明以及赋值 1、使用关键字var声明,或者简短声...