深度比较两个对象,当对象的属性类型相同且属性的值相同(对象的顺序可以不一样),两个对象就相等。 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...
if(obj1 === obj2) // it's just the same object. No need to compare. return true; if(isPrimitive(obj1) && isPrimitive(obj2)) // compare primitives return obj1 === obj2; if(Object.keys(obj1).length !== Object.keys(obj2).length) return false; // compare objects with same num...
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...
deepEqualon the other hand goes deeper into the object when it reaches the address. It compares the strings forline1andline2with===and decides that the two objects are equal. Checking for equality with JSON.stringify Another way to compare two objects is to convert them to JSON and check i...
上述代码中,我们定义了 compareObjects 函数。函数内部使用 JSON.stringify 将 obj1 和 obj2 序列化成字符串,并通过比较这两个字符串是否相等来判断属性值是否相同。调用 compareObjects 函数并传入对象 object1 和 object2,发现它们的属性值完全相同,所以控制台会输出 true。而传入 object1 和 object3,因为它们的...
// Deep compare the contents, ignoring non-numeric properties. while (length--) //递归调用。 if (!eq(a, b, aStack, bStack)) return false; else // Deep compare objects. //对比纯对象。 var keys = _.keys(a), key; length = keys.length; ...
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: '...
那么一些use-deep-compare-effect下面这样的写法,没问题吗? import { useRef, useEffect } from 'react'; import _ from 'lodash'; export function useDeepCompareEffect<T>(fn, deps: T) { // 使用一个数字信号控制是否渲染,简化 react 的计算,也便于调试 let renderRef = useRef<number | any>(0); ...
而sort支持传入一个compareFunction(a, b)的参数,其中a、b为数组中进行比较的两个非空对象(所有空对象将会排在数组的最后),具体比较规则为: 返回值小于0,a排在b的左边返回值等于0,a和b的位置不变返回值大于0,a排在b的右边因此利用sort即可写一个打乱数组的方法: [1,2,3,4].sort(()=>.5-Math.random...
To compare two JavaScript objects to check if they have the same key-value pairs: Use JSON.stringify() to convert objects into strings and then compare the JSON strings. Use Lodash, a 3rd-party library, isEqual() to perform a deep comparison between the objects. Unlike JavaScript arrays ...