JuniorTheoryCommon

What does the program print?

PHP

<?php

$stock = ['pear' => 2, 'apple' => 5];
$stock['kiwi'] = 1;
$stock['pear'] = 7;
unset($stock['apple']);
foreach ($stock as $fruit => $qty) {
    echo $fruit, '=', $qty, ' ';
}
echo count($stock), "\n";

pear=7 kiwi=1 2

Expecting $stock['pear'] = 7 to move pear to the end: writing to an existing key changes the value in place, and the pair keeps the position it was added at.
Expecting unset to leave a gap that count still counts: unset($stock['apple']) removes the key with its value, so count returns 2.

How would you move pear to the end of the array?
What does isset($stock['apple']) return after the unset, and why?

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JuniorTheoryCommon

What does the program print?

PHP

<?php

$stock = ['pear' => 2, 'apple' => 5];
$stock['kiwi'] = 1;
$stock['pear'] = 7;
unset($stock['apple']);
foreach ($stock as $fruit => $qty) {
    echo $fruit, '=', $qty, ' ';
}
echo count($stock), "\n";

pear=7 kiwi=1 2

Expecting $stock['pear'] = 7 to move pear to the end: writing to an existing key changes the value in place, and the pair keeps the position it was added at.
Expecting unset to leave a gap that count still counts: unset($stock['apple']) removes the key with its value, so count returns 2.

How would you move pear to the end of the array?
What does isset($stock['apple']) return after the unset, and why?

Back to questions Open topic in roadmap →Answer it yourself — Quiz