Level 55
@deepu07 do you need just final array (with 1 value) or all arrays?
May 22, 2021
9
Level 11
PHP Optimization
Hello Mates,
Here is my problem I was trying to optimize this code but got stuck up. any help or suggestion would be great. highly appreciated and thanks in advance.
//[1,2,3,4,5]
//[3,5,7,9]
//[8,12,16]
//[20,28]
//[48]
$arr = [1,2,3,4,5];
for ($j = 0; $j < count($arr)-1; $j++) {
$arr0[$j] = $arr[$j] + $arr[$j + 1];
}
for ($i = 0; $i < count($arr0) - 1; $i++) {
$arr1[$i] = $arr0[$i] + $arr0[$i + 1];
}
for ($i = 0; $i < count($arr1) - 1; $i++) {
$arr2[$i] = $arr1[$i] + $arr1[$i + 1];
}
for ($i = 0; $i < count($arr2) - 1; $i++) {
$arr3[$i] = $arr2[$i] + $arr2[$i + 1];
}
print_r($arr);
print_r($arr0);
print_r($arr1);
print_r($arr2);
print_r($arr3);
Level 3
rather than calling for loop 4 times, you could call while. OR even better, create a function and then go through the process recursively.
Level 39
I was trying to optimize this code
speed execution ?
nb of iines ?
readability ?
Optimize mean at least to have define a criteria ...
Level 11
@silencebringer @sr57 I just don't wanna write that many for loops I just wanna complete the execution in two for loops. Like, let say I have 1000 elements I don't want to write 1000 for loops.
Level 39
Use an multi-dim array
for ( $n..
for ($i...
$arrs[$n,$i)=...
Level 55
@deepu07 something like
function awesomeFunction($arr)
{
if (count($arr) < 2) {
return $arr;
}
for ($i = 0; $i < count($arr) - 1; $i++) {
$arr[i] += $arr[$i + 1];
}
array_pop($arr);
// print_r($arr); // uncomment to see every step
return awesomeFunction($arr);
}
print_r(awesomeFunction(awesomeFunction));
1 like
Level 1
I guess recursion would be the best idea, like @amirkamizi said. But my pascal class was 2 centuries ago, so I can't really help. :D
Level 122
what's it meant to do?
1 like
Level 2
good Q. I was wonderinfg that too. Is the out put supposed to be an integer of 48, an array of ['48'], pass each step to another function, return a collection of arrays or something else.
*one should not rule out the possibility of an XY Problem when asking for help (or proffering a solution).
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