PHP Exercises: Compute the difference between the largest and smallest values in a given array of integers and length one or more
PHP Basic Algorithm: Exercise-107 with Solution
Write a PHP program to compute the difference between the largest and smallest values in a given array of integers and length one or more.
Sample Solution:
PHP Code :
<?php
function test($nums)
{
$small_num = 0;
$biggest_num = 0;
if (sizeof($nums) > 0)
$small_num = $biggest_num = $nums[0];
for ($i = 1; $i < sizeof($nums); $i++)
{
$small_num = min($small_num, $nums[$i]);
$biggest_num = max($biggest_num, $nums[$i]);
}
return $biggest_num - $small_num;
}
echo "Difference between the largest and smallest values: ". test([1, 5, 7, 9, 10, 12] );
Sample Output:
Difference between the largest and smallest values: 11
Flowchart:
PHP Code Editor:
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Previous: Write a PHP program to count even number of elements in a given array of integers.
Next: Write a PHP program to compute the sum of values in a given array of integers except the number 17. Return 0 if the given array has no integer.
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PHP: Tips of the Day
How to Sort Multi-dimensional Array by Value?
Try a usort, If you are still on PHP 5.2 or earlier, you'll have to define a sorting function first:
Example:
function sortByOrder($a, $b) { return $a['order'] - $b['order']; } usort($myArray, 'sortByOrder');
Starting in PHP 5.3, you can use an anonymous function:
usort($myArray, function($a, $b) { return $a['order'] - $b['order']; });
And finally with PHP 7 you can use the spaceship operator:
usort($myArray, function($a, $b) { return $a['order'] <=> $b['order']; });
To extend this to multi-dimensional sorting, reference the second/third sorting elements if the first is zero - best explained below. You can also use this for sorting on sub-elements.
usort($myArray, function($a, $b) { $retval = $a['order'] <=> $b['order']; if ($retval == 0) { $retval = $a['suborder'] <=> $b['suborder']; if ($retval == 0) { $retval = $a['details']['subsuborder'] <=> $b['details']['subsuborder']; } } return $retval; });
If you need to retain key associations, use uasort() - see comparison of array sorting functions in the manual
Ref : https://bit.ly/3i77vCC
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