On Mon, Nov 17, 2008 at 9:47 AM, Jochem Maas <jochem@xxxxxxxxxxxxx> wrote:
> Nathan Rixham schreef:
>> Jochem Maas wrote:
>>> $a = range(1,10);
>>> for ($i = 0, $c = count($a); $i < $c; print($a[$i]."\n"), $i++);
>>
>> think the point of this is to count the items in an array without count
>> mate :p no point in the above you could just:
>> $c = count($a);
>
> I thought the point was to avoid count() on every iteration.
> not using count() but instead looping the complete array is stupid,
> if the OP's teacher thinks count() is bad then that teacher suck's,
> count() is efficient as it can be ... it does'nt actually do a
> count when it's called merely looks up the length property of the
> array (unless I'm grossly mistaken)
>
>>
>> foreach!
>> $a = range(1,10);
>> $c = 0;
>> foreach($a as $b) {
>> $c++;
>> }
>> echo $c. PHP_EOL;
>>
>> if you really want a challenge try this one..
>>
>> task: add the numbers 5 and 17 together, using php, without using the +
>> operator. fill it in:
>>
>> function add($a , $b) {
>> //code here but no + - / * operators
>
> I'll assume no post/pre-increment operators either.
>
>> return $answer;
>> }
>>
>> echo add(5, 17);
>
> function add($a, $b) {
> $a = array_merge(array_fill(0, $a, 1), array_fill(0, $b, 1));
> return count($a);
> }
>
> not very efficient :-) .. probably one of a 1000 ways to fudge it :-)
>
And another... :)
function add($a, $b) {
return array_sum(func_get_args());
}
Andrew
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