On 7/30/07, Siddhesh Poyarekar <[EMAIL PROTECTED]> wrote:
> 1) Which is more efficient, or is there no difference between them:
>
> while(true)
> {
> ...
> if(condition)
> break;
> }
>
> OR
>
> while(condition)
> {
> ...
> }
Hmm...well, it depends. The first block will break after executing
some instructions. It actually looks like a Do...While loop since it
executes instructions FIRST and then CHECKs the condition.
The second block first checks the condition and then executes the
instructions. So it really depends on the specific code. The general
blocks can't be compared really as they are NOT the same.
> 2) Does this code only look bad or does it execute slowly as well:
>
> while(true)
> {
> if(condition1)
> {
> do_something;
> break;
> }
> if(condition2)
> {
> do_something;
> break;
> }
>
> do_something;
>
> break;
> }
Actually that piece of code will execute only ONCE. Why? Because you
have a break just before the closing brace of the while loop.
If we ignore that then, again depends on the specific purpose of the
code. Yes it does look bad and yes it will work slowly if the three
conditions are rarely executed. It then makes sense to take them out
and execute them separately but then thats not always possible.
--
Regards,
Dinesh A. Joshi
--
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