Proper switching and casing.
Proper switching and casing.
- Subject: Proper switching and casing.
- From: Alex Zavatone <email@hidden>
- Date: Thu, 09 Apr 2015 16:53:49 -0400
I'm looking through the new code that I've inherited and getting to know and love it and I'm running across a few new circumstances I've never seen before.
With that said, I just noticed a switch statement with empty case conditions where the variable being checked will be 0, and the execution point/program counter hits both the case statement for 0 and for 1.
It looks something like this:
switch (myObject.myInt) {
case 0:
{
// There is no code at all within these parens. This is empty.
}
case 1:
{
// Important stuff happens here
}
break;
case 2:
{
// More important stuff happens here
}
break;
default:
break;
}
I was really surprised as all our code within case 1 was getting executed when myInt == 0 and when myInt == 1. Then I noticed that case:0 was put in for a placeholder condition. Since it was entered as a placeholder, it was entered without a break statement after it. In the case of myInt == 0, the program execution just continued down into the case of 1 code block and happily executed it.
Who says learning new code isn't fun?
Cheers,
Alex
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