Question

In Python I can write:

for i, val in enumerate(lst):
    print i, val

The only way I know how to do this in PHP is:

for($i = 0; $i < count(lst); $i++){
    echo "$i $val\n";
}

Is there a cleaner way in PHP?

Answer 1

Don’t trust PHP arrays, they are like Python dicts. If you want safe code consider this:

<?php
$lst = array('a', 'b', 'c');

// Removed a value to prove that keys are preserved
unset($lst[1]);

// So this wont work
foreach ($lst as $i => $val) {
        echo "$i $val \n";
}

echo "\n";

// Use array_values to reset the keys instead
foreach (array_values($lst) as $i => $val) {
        echo "$i $val \n";
}
?>

–

0 a 
2 c 

0 a 
1 c