On Mon, Feb 14, 2022 at 10:03:53AM +0100, Thomas Zimmermann wrote:
Am 11.02.22 um 16:41 schrieb Andy Shevchenko:
...
IMO *always* prefer a for loop over while or do-while.
The for (i = 0; i < N; i++) is such a strong paradigm in C. You
instantly know how many times you're going to loop, at a glance. Not so
with with the alternatives, which should be used sparingly.
while () {} _is_ a paradigm, for-loop is syntax sugar on top of it.
Naw, that's not true.
In the section 3.5 "Loops - While and For" in "The C Programming
Language" 2nd by K&R, the authors said:
The for statement ... is equivalent to ... while..."
They said that for is equivalent to while, and not otherwise.
Also, syntax sugar by definition declares something that can be written as
a single line of code, which usually is done using more (not always).
An idiomatic for loop, such as for (i = ...; i < N;
++i), is such a strong pattern that it's way better than the corresponding
while loop.
And yes, the do-while suggested above is buggy, and you actually need to
stop and think to see why.
It depends if pixels can be 0 or not and if it's not, then does it contain last
or number.
The do {} while (--pixels); might be buggy iff pixels may be 0.
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