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< meta http-equiv = " Content-Type " content = " text/html; charset=utf-8 " /> < title > </ title > < meta charset = " utf-8 " /> </ head > < script type = " text/javascript " > var jsonArr = [ "ID" : "" , "NO" : "001" , "NAME" : "测试对象1" "ID" : "" , "NO" : "002" , "NAME" : "测试对象2" "ID" : "" , "NO" : "003" , "NAME" : "测试对象3" "ID" : "" , "NO" : "004" , "NAME" : "测试对象4" "ID" : "" , "NO" : "005" , "NAME" : "测试对象5" var jsonArr2 = [ "ID" : "" , "NO" : "003" , "NAME" : "测试对象3" "ID" : "" , "NO" : "004" , "NAME" : "测试对象4" "ID" : "" , "NO" : "006" , "NAME" : "测试对象6" "ID" : "" , "NO" : "007" , "NAME" : "测试对象7" var length1 = jsonArr . length ; var length2 = jsonArr2 . length ; for ( var i = 0 ; i < length1 ; i ++ ) { for ( var j = 0 ; j < length2 ; j ++ ) //判断添加的数组是否为空了 if ( jsonArr . length > 0 ) { if ( jsonArr [ i ] [ "NAME" ] === jsonArr2 [ j ] [ "NAME" ] ) { jsonArr . splice ( i , 1 ) ; //利用splice函数删除元素,从第i个位置,截取长度为1的元素 length1 -- ; for ( var n = 0 ; n < jsonArr2 . length ; n ++ ) { jsonArr . push ( jsonArr2 [ n ] ) ; alert ( JSON . stringify ( jsonArr ) ) ; </ script > </ body > </ html >

##运行结果:
这里写图片描述

javascript删除数组中重复的元素,并统计每一个元素出现的次数

		var array = new Array(1,2,5,1,4,4,2,3,5,1,1,5,5,5,6,7,3,9,9,10);
		var arr = new Array();
		var test = new Array();
		var num = 1;
		var temp = "";
		var size = array.length;
		println("-----------------------------"+size);
		for(var i=0;i<size;i++){
			for(var j=i+1;j<size;j++){	
				if(array[i] == array[j]){
					array.splice(j,1)
					size--;
					j--;
					num ++;	
			test[i] = num ;
			num  = 1;
			arr[i] = array[i]
		for(var i=0;i<arr.length;i++){
			println("----------------------元素:"+arr[i]+"\t\t个数为:"+test[i]);
		var array = new Array(1,2,5,1,4,4,2,3,5,1,1,5,5,5,6,7,3,9,9,10);
		var arr = new Array();
		var test = new Array();
		var num = 1;
		var temp = "";
		var size = array.length;
		println("-----------------------------"+size);
		for(var i=0;i<size;i++){
			for(var j=i+1;j<size;j++){	
				if(array[i] == array[j]){
					temp = array[j];
					array[j] = array[size-1];
					array[size-1] = temp;
					size--;
					j--;
					num++;	
			test[i] = num;
			num = 1;
			arr[i] = array[i]
		for(var i=0;i<arr.length;i++){
			println("----------------------元素:"+arr[i]+"\t\t个数为:"+test[i]);
                    Index.html&amp;lt;!DOCTYPE html&amp;gt;&amp;lt;html&amp;gt;&amp;lt;head&amp;gt;    &amp;lt;meta http-equiv=&amp;quot;Content-Type&amp;quot; content=&amp;quot;text/html; charset=utf-8&amp;quot; /&amp;gt;    &amp;lt;title&amp;gt;&amp;lt;/title&amp;gt
				
本文实例讲述了JavaScript简单实现合并两个Json对象的方法。分享给大家供大家参考,具体如下: $.mergeJsonObject = function(jsonbject1, jsonbject2) { var resultJsonObject = {}; for (var attr in jsonbject1) { resultJsonObject[attr] = jsonbject1[attr]; for (var attr in jsonbject2) { resultJsonObject[attr] = jsonbject2[attr];
本文实例讲述了JavaScript比较两个对象是否相等的方法。分享给大家供大家参考。具体如下: 在Python中可以通过cmp()内建函数来比较两个对象所包涵的数据是否相等(数组、序列、字典)。但是在javascript语言中并没有相关的实现。本js代码通过对js对象进行各方面的比较来判断两个对象是否相等 cmp = function( x, y ) { // If both x and y are null or undefined and exactly the same if ( x === y ) { return true; // If they are not stric
function arrayReSet(jsonArray) { let json = jsonArray; //两个数组对象合并 let newJson = []; //盛放去后数据的新数组 console.log(json) for (let i = 0; i < json.length; i++) { //循环json数组对象的内容 let flag = true; //建立标记,判断数据是否复,true为不复 for (let
let aWithOverrides = { ...a, x: 1, y: 2 }; let aWithOverrides = { ...a, ...{ x: 1, y: 2 } }; let x = 1, y = 2, aWithOverrides = { ...a, x, y }; let aWithOverrides = Object.assign({}, a, { x: 1, y: 2 }); Array.prototype.unique = function() { var newArr = []; for (var i = 0; i < this.length; i++) { if(newArr.indexOf(this[i]) == -1){ newArr.push(this[i]); return newArr; var ja
const b = [3, 4, 5]; const c = [...a, ...b]; // [1, 2, 3, 3, 4, 5] const set = new Set(c); const d = [...set]; // [1, 2, 3, 4, 5] console.log(d);