导语：JavaScript如何进行数组复制？下面是小编给大家提供的'数组复制代码实现，大家可以参考阅读，更多详情请关注应届毕业生考试网。
push
function copyArray(arr){
var result = [];
for(var i = 0; i < th; i++){
(arr[i]);
}
return result;
}
var obj1=[1,2,3];
var obj2=copyArray(obj1);
(obj1); //[1,2,3]
(obj2); //[1,2,3]
(4);
(obj1); //[1,2,3]
(obj2); //[1,2,3,4]
join
??使用该方法的缺点是数组中的项全部变成了字符串形式
function copyArray(arr){
var result = [];
result = ()t(',');
return result;
}
var obj1=[1,2,3];
var obj2=copyArray(obj1);
(obj1); //[1,2,3]
(obj2); //['1','2','3']
(4);
(obj1); //[1,2,3]
(obj2); //['1','2','3',4]
concat
function copyArray(arr){
var result = [];
result = at();
return result;
}
var obj1=[1,2,3];
var obj2=copyArray(obj1);
(obj1); //[1,2,3]
(obj2); //[1,2,3]
(4);
(obj1); //[1,2,3]
(obj2); //[1,2,3,4]
slice
function copyArray(arr){
var result = [];
result = e();
return result;
}
var obj1=[1,2,3];
var obj2=copyArray(obj1);
(obj1); //[1,2,3]
(obj2); //[1,2,3]
(4);
(obj1); //[1,2,3]
(obj2); //[1,2,3,4]
深拷贝
??以上方法实现的仅是数组的浅拷贝，如果要实现数组的深拷贝，需要使用递归方法
function copyArray(arr,result){
var result = result || [];
for(var i = 0; i < th; i++){
if(arr[i] instanceof Array){
result[i] = [];
copyArray(arr[i],result[i]);
}else{
result[i] = arr[i];
}
}
return result;
}
var obj1=[1,2,[3,4]];
var obj2=copyArray(obj1);
(obj1[2]); //[3,4]
(obj2[2]); //[3,4]
obj2[2](5);
(obj1[2]); //[3,4]
(obj2[2]); //[3,4,5]
