JS中如何比較兩個(gè)Json對(duì)象是否相等實(shí)例代碼

    在js前端面試過(guò)程中，經(jīng)常會(huì)遇到這樣的筆試題：JS中如何比較兩個(gè)Json對(duì)象是否相等實(shí)例代碼，下面小編抽點(diǎn)時(shí)間給大家整理下，一起看看吧。
    1.先準(zhǔn)備三個(gè)工具方法，用于判斷是否是對(duì)象類(lèi)型，是否是數(shù)組，獲取對(duì)象長(zhǎng)度
    function isObj(object) {
    return object && typeof (object) == 'object' && Object.prototype.toString.call(object).toLowerCase() == "[object object]";
    }
    function isArray(object) {
    return object && typeof (object) == 'object' && object.constructor == Array;
    }
    function getLength(object) {
    var count = 0;
    for (var i in object) count++;
    return count;
    }
    2.準(zhǔn)備兩個(gè)相同或不同的Json對(duì)象
    var jsonObjA = {
    "Name": "MyName",
    "Company": "MyCompany",
    "Infos": [
    { "Age": "100" },
    {
    "Box": [
    { "Height": "100" },
    { "Weight": "200" }
    ]
    }
    ],
    "Address": "馬欄山"
    }
    var jsonObjB = {
    "Name": "MyName",
    "Company": "MyCompany",
    "Infos": [
    { "Age": "100" },
    {
    "Box": [
    { "Height": "100" },
    { "Weight": "200" }
    ]
    }
    ],
    "Address": "馬欄山二號(hào)"
    }
    3.主要的代碼
    function Compare(objA, objB) {
    if (!isObj(objA) || !isObj(objB)) return false; //判斷類(lèi)型是否正確
    if (getLength(objA) != getLength(objB)) return false; //判斷長(zhǎng)度是否一致
    return CompareObj(objA, objB, true);//默認(rèn)為true
    }
    function CompareObj(objA, objB, flag) {
    for (var key in objA) {
    if (!flag) //跳出整個(gè)循環(huán)
    break;
    if (!objB.hasOwnProperty(key)) { flag = false; break; }
    if (!isArray(objA[key])) { //子級(jí)不是數(shù)組時(shí),比較屬性值
    if (objB[key] != objA[key]) { flag = false; break; }
    } else {
    if (!isArray(objB[key])) { flag = false; break; }
    var oA = objA[key], oB = objB[key];
    if (oA.length != oB.length) { flag = false; break; }
    for (var k in oA) {
    if (!flag) //這里跳出循環(huán)是為了不讓遞歸繼續(xù)
    break;
    flag = CompareObj(oA[k], oB[k], flag);
    }
    }
    }
    return flag;
    }
    4.調(diào)用方法
    var result = Compare(jsonObjA, jsonObjB);
    console.log(result); // true or false