The trap of using splice in Action Script 3.0

If the array contains the same continuous content, such as the following array:
VaR testary: array = [6, 1, 1, 5];

If you want to remove 1, the content of the array will be changed to [6, 5]. But what about the result? Try the following:Code:
For (var I: Int = 0; I <testary. length; I ++ ){
If (testary [I] = 1 ){
Testary. splice (I, 1 );
}
}
Trace (testary );

Output: 6, 1, 5

Why is there another 1? When the splice () method deletes the elements in the logarithm group, when it is cut to the array subscript I = 1, the length of the array is reduced by 1, the position of the next cycle to the lower mark is I = 3, and the element with subscript I = 2 is skipped.

 

The following methods can solve the security problem of using Splice:

1. after each array element is deleted, the subscript is automatically subtracted
Public Function dosplice1 (ary: array): Array {
for (var I: Int = 0; I If (ary [I] = 1) {
ary. splice (I, 1);
I --;
}< BR >}< br> return ary;
}< br> 2. reverse cyclic deletion
Public Function dosplice2 (ary: array): Array {
for (var I: Int = ary. length; I> = 0; I --) {
If (ary [I] = 1) {
ary. splice (I, 1);
}< BR >}< br> return ary;
}