導語：JavaScript如何進行陣列複製？下面是小編給大家提供的'陣列複製程式碼實現，大家可以參考閱讀，更多詳情請關注應屆畢業生考試網。
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
??使用該方法的缺點是陣列中的項全部變成了字串形式
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]
深拷貝
??以上方法實現的僅是陣列的淺拷貝，如果要實現陣列的深拷貝，需要使用遞迴方法
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]
