function doSomething
{
var i:int;
for(i=0;i++;i<10)
{
}
}
Is functionally identical to this:
function doSomething
{
for(var i:int =0;i++;i<10)
{
}
}
Wrong. It's not.
In the latter example, i is not available after the loop. In the first
example, it is.
var i:int;
for (i = 0; i < 10; i++)
{
if (i == 5) break;
}
trace(i);
-- 5
There are a multitude of uses for this, and I do it all the time.
Additionally, I read somewhere many moons ago (back in my FLASM days) that
declaring variables outside a for loop is less bytecode and uses less memory.
I don't believe that applies to the counter declaration, but I do know it
applies to the comparison as well as vars declared inside the for loop.
However, this level of optimization is only useful in a practical way on mobile
and some games.
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