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对象的合并 #87
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//
console.log(JSON.stringify(Object.assign(obj1, obj2)))
//不用Object.assign
function myAssign(obj, ...src) {
for (let i = 0; i < src.length; i++) {
if (src[i] !== null || src[i] !== undefined) {
for (let index in src[i]) {
if (src[i].hasOwnProperty(index)) {
obj[index] = src[i][index];
}
}
}
}
return obj;
}
console.log(JSON.stringify(myAssign(obj1, obj2))) |
这个mergeObject方法的主要逻辑是:
`
` |
function isObject(obj) {
return Object.prototype.toString.call(obj) === '[object Object]';
}
function mergeObject(obj1, obj2) {
let result = {...obj1};
for (let key in obj2) {
if (isObject(obj2[key]) && isObject(result[key])) {
result[key] = mergeObject(result[key], obj2[key]);
} else {
result[key] = obj2[key];
}
}
return result;
}
var obj1 = {
a: 1,
b: { c: 2, d: 3 },
e: 4,
h: { i: 5 }
};
var obj2 = {
a: 111,
b: { c:222, f :333 },
g :444,
h :666
};
var mergedObj = mergeObject(obj1, obj2);
// 将结果转化为JSON并输出到#app元素中
document.querySelector('#app').textContent = JSON.stringify(mergedObj, null, 4); |
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