Two array de-duplicated JS Code

First:
Copy codeThe Code is as follows:
Function unique (arr ){
Var obj ={}, newArr = [];
For (var I = 0; I <arr. length; I ++ ){
Var value = arr [I];
If (! Obj [value]) {
Obj [value] = 1;
NewArr. push (value );
}
}
Return newArr;
}

This method saves the array value to the object. Therefore, when the array has an object member, the operation fails (the key of the object as the object will be converted to a string ).
Method 2:
Copy codeThe Code is as follows:
Function unique (arr ){
For (var I = 0; I <arr. length; I ++ ){
For (var j = I + 1; j <arr. length; j ++ ){
If (arr [I] === arr [j]) {
Arr. splice (j, 1 );
J --}
}
}
Return arr;
}

This method is supported even if the input array contains objects. Note that '=', but nested loops are used, which is inferior to the first method.