function uniqueObjectArray(arr, key) { let unique = []; let seen = new Set(); for(let i = 0; i < arr.length; i++) { if(!seen.has(arr[i][key])) { seen.add(arr[i][key]); unique.push(arr[i]); } } return unique; } let objects = [{id: 1, name: 'Alice'}, {id...
if(array[i]===array[j]) { array.splice(j,1); j--; } } } return array; } /** *unique the array *@param {Array} array array to unique *@return {Array} uniqued array ,note change parameter */ function undulpicate(array){ for(var i=0;i<array.length;i++) { for(var j=i...
直接上代码: 1<!DOCTYPE html>2345uvi678910vara=["hello","world"];11varb=["uvi","ivu"];12varc=a.concat(b);//数组合并13document.write(c);1415vard=["1","3","4","5","2","6"];16document.write(d.sort());//数组排序1718document.write(d.sort(function(a,b){19returnb-a;...
Array.prototype.unique意思是给Array对象增加了原型方法unique，这样任意一个数组对象，比如var testArr = [1,2,3,"a","b","1",2,3]，就可以用testArr.unique来使用这个方法了。可以去了解下Javascript关于创建自定义对象的内容，尤其是通过构造函数的方式创建对象。应该是自定义的吧这个是往数组原...
1 Array.prototype.unique1 = function () { 2 var n = []; //一个新的临时数组 3 for (var i = 0; i < this.length; i++) //遍历当前数组 4 { 5 //如果当前数组的第i已经保存进了临时数组,那么跳过, 6 //否则把当前项push到临时数组里面 7 if (n.indexOf(this[i]) == -1) n.pus...
peon2.map(item=>{ peon.push(item); }) log(peon); 更多资料: https://www.cnblogs.com/caideyipi/p/7679681.html https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Array/Reduce
数组是js中一种重要的数据类型对象,但常常带有重复的元素,因此我们需要一些方法来对数组进行去重。1.1.使用filter和Mapfunction uniqueFunc(arr, uniId){ const res = new Map(); return arr.filter((item) => !res.has(item[uniId]) && res.set(item[u ...
NSArrayobjects or Swift arrays become JavaScript arrays and vice versa, with elements that JavaScriptCore recursively copies and converts. Objective-C blocks (or Swift closures with the@convention(block)attribute) become JavaScriptFunctionobjects, with parameter and return types that JavaScriptCore convert...
// 执行 JS 回调 req_wrap->MakeCallback(env->oncomplete_string(), arraysize(argv), argv); } AfterConnect 中定义了一个 BaseObjectPtr,所以这时 C++ 对象ConnectWrap 的引用数加 1 后变成 2,接着执行了 JS 层回调函数,执行完之后,Wrapper 和AfterConnect 函数中的 BaseObjectPtr 会析构,从而 Connec...
JavaScript is a structurally typed language where objects are compatible if they share the same structure (i.e., the same set of properties and methods).Duck Typing: This is a concept where an object's suitability is determined by the presence of certain properties and methods, rather than ...