Array. slice () and Array. splice () Return Value Type _ basic knowledge

Array. slice () and Array. splice () return value types recently used in an exercise. Array. slice () and Array. splice ().
Array. slice () returns Array-an Array consisting of elements in a certain range in the original Array.
Array. splice () returns Array-an Array containing elements deleted from the original Array.
The returned result is an array. You can use typeof () to check whether it is an object. That's right! We need to remind you that:
When the Array element is a number, use Array. slice () and Array. splice () to compare the size of an element. Note that the value must be converted.
Type, which is hidden and difficult to query after an error occurs.
The object type cannot be directly converted to a Number using number (). toString ()/8 @ $
For example:

Var arr = [0, 1, 2];
Var arr1 = [1, 2, 3];
For (var I = 0; I <arr. length; I ++ ){
Trace (arr. slice (I, I + 1) + "--" + typeof (arr. slice (I, I + 1 )));
// Output -- 0 -- object .....
Trace (arr1.slice (I, I + 1) + "--" + typeof (arr1.slice (I, I + 1 )));
// Output -- 1 -- object ....
Trace (arr. slice (I, I + 1) // output -- false, and object cannot be compared.
Trace (arr. slice (I, I + 1)> arr1.slice (I, I + 1 ));
// Output -- false, and object cannot be compared.
Trace (Number (arr. slice (I, I + 1 )) // Output -- undefined, and the object cannot be converted using Number ().
Trace (Number (arr. slice (I, I + 1). toString ()) // Output -- true, first toString () and then Number ()
}

Trace (arr. slice (I, I + 1) trace (arr. slice (I, I + 1)> arr1.slice (I, I + 1 ));
Write
Trace (arr. slice (I, I + 1) [0] trace (arr. slice (I, I + 1) [0]> arr1.slice (I, I + 1) [0]);
Yes.