Objects are reference types so you can’t just use === or == to compare 2 objects. One quick way to compare if 2 objects have the same key value, is using JSON.stringify. Another way is using Lodash isEqual function 👏const k1 = { fruit: '🥝' }; const k2 = { fruit: '...
function compareObjects(obj1, obj2, excludeKeys) { const keys1 = Object.keys(obj1); const keys2 = Object.keys(obj2); const filteredKeys1 = keys1.filter(key => !excludeKeys.includes(key)); const filteredKeys2 = keys2.filter(key => !excludeKeys.includes(key)); if (filteredKeys1.le...
functiondeepCompare(x, y) {vari, l, leftChain, rightChain;functioncompare2Objects(x, y) {varp;// remember that NaN === NaN returns false// and isNaN(undefined) returns trueif(isNaN(x) &&isNaN(y) &&typeofx ==='number'&&typeofy ==='number') {returntrue; }// Compare primitives...
The fastest and simplest way to compare two objects is to convert them to strings by using the JSON.stringify() method and then use the comparison operator to check if both strings are equal: const obj1 = { burger: '🍔', pizza: '🍕' }; const obj2 = { burger: '🍔', pizza:...
function findArrayDifferences(array1, array2) { var differences = []; for(var i = 0; i < array1.length; i++) { var obj1 = array1[i]; var found = false; for(var j = 0; j < array2.length; j++) { var obj2 = array2[j]; if (compareObjects(obj1, obj2)) { found ...
Compare Objects for Equivalent PropertiesWrite a JavaScript program to compare two objects to determine if the first contains equivalent property values to the second one.Use Object.keys() to get all the keys of the second object. Use Array.prototype.every(), Object.prototype.hasOwnProperty() ...
Object 类型的比较是非常重要的基础知识,通过How to Compare Objects in JavaScript这篇文章,我们可以学到四种对比方法:引用对比、手动对比、浅对比、深对比。 2 简介 引用对比 下面三种对比方式用于 Object,皆在引用相同是才返回true: === == Object.is() ...
// Create two Date objectsconstfirstDate=newDate('2025-01-01');constsecondDate=newDate('2024-01-02');// Get the time in milliseconds for each dateconstfirstTime=firstDate.getTime();constsecondTime=secondDate.getTime();// Compare the time valuesif(firstTime<secondTime){console.log('first...
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filterdeveloper.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter 我们先创建测试数据, letarray1=[{id:"50",active:"a",value:10},{id:"51",active:"a",value:11}];letarray2=...
// Create two Date objectsconstfirstDate =newDate('2025-01-01');constsecondDate =newDate('2024-01-02');// Get the time in milliseconds for each dateconstfirstTime = firstDate.getTime();constsecondTime = secondDate.getTime();// Compare the time valuesif(firstTime < secondTime) {conso...