JavaScript数组及非数组对象的深浅克隆详解原理

var arr1 = ['demo', 1, 2];
var arr2 = [];
// 数组的浅克隆
for (var i = 0; i < arr1.length; i++) {
    arr2[i] = arr1[i];
}
console.log(arr2);
console.log(arr1 == arr2);

function deepClone(o) {
	var result = [];
	for (var i = 0; i < o.length; i++) {
		result.push(deepClone(o[i]));
	}
	return result;
}

var obj1 = { a: 1, b: 2, c: 3, d: [4, 5, { e: 'demo' }] };
var obj2 = {};
// 对象的浅克隆
for (var i in obj1) {
    obj2[i] = obj1[i];
}
console.log(obj2);
console.log(obj1 == obj2);

function deepClone(o) {
	var result = {};
	for (var i in o) {
		result[i] = deepClone(o[i]);
	}
	return result;
}

var obj1 = { a: 1, b: 2, c: 3, d: [4, 5, { e: 'demo' }] };
var arr1 = ['demo', 1, 2];
// 深克隆
function deepClone(o) {
    if (Array.isArray(o)) {
        // 是数组
        var result = [];
        for (var i = 0; i < o.length; i++) {
            result.push(deepClone(o[i]));
        }
    } else if (typeof o == 'object') {
        // 非数组，是对象
        var result = {};
        for (var i in o) {
            result[i] = deepClone(o[i]);
        }
    } else {
        // 基本类型值
        var result = o;
    }
    return result;
}
console.log(deepClone(arr1));
console.log(deepClone(obj1));