博客

    // 深度拷贝Array
    var deepCopyArray = function(sourceArray){
        let target = [];
        for (let i = 0; i<sourceArray.length; i++) {
            if (judgeisArrayOrObject(sourceArray[i]) == 'array') {
                target.push(deepCopyArray(sourceArray[i]))
            } else if (judgeisArrayOrObject(sourceArray[i]) == 'object') {
                target.push(deepCopyObject(sourceArray[i]));
            } else {
                target.push(sourceArray[i]);
            }
        }
        return target;
    }
    
    // 深度拷贝Object
    var deepCopyObject = function(sourceObj){
        let obj = {};
        for (let key in sourceObj) {
            if (judgeisArrayOrObject(sourceObj[key]) == 'object') {
                obj[key] = sourceObj[key] ? deepCopyObject(sourceObj[key]) : null;
            } else if (judgeisArrayOrObject(sourceObj[key]) == 'array') {
                obj[key] = deepCopyArray(sourceObj[key]);
            } else {
                obj[key] = sourceObj[key];
            }
        }
        return obj
    }
    
    // 判断是对象类型
    var judgeisArrayOrObject = function(source) {
        if (typeof source == 'object' && Array.isArray(source)) {
            return 'array'
        }
        return typeof(source)
    }