Question

December 2016 High Temps - 45,40,39,42,44,42,43,36,28,28,35,42,33,31,19,23,58,59,27,37,38,40,41,47,40,66,65,43,41,33,43

Get the top five hottest and top five coldest high temperatures of the month and display them (the day and temperature)

language is php also i already put in array

Answer 1

Approach:

• In order to find the top and least temperatures from the given values, it is evident that we require sorting. However, we also need to display the days of the respective temperatures, so we need to somehow store that data as well.
• We use the following construct in PHP to associate the respective days of December 2016.

$temperature = array("1"=>"45", "2"=>"40" . . . "31"=>"43");

• In the above construct, the "1" refers to the date and "45" refers to the corresponding temperature. "1" is called the key and "45" is the value in this case. This is known as an associative array.
• The inbuilt asort() function helps us to sort the array by value in ascending order (temperature values in this case). Similarly, the arsort() sorts the key-value pairs in descending order.

asort($temperature)

arsort($temperature)    ~The r stands for reverse~

• The for-each loop iterates over the associative array where $x is the key and $x_value is the corresponding value.
• We use the variable $i in the code below to keep track of 5 temperatures and then break the for-each loop after 5 outputs.

Only showing the array for some temperature values for this example. You can populate the associated array with all values if required. The code below has been tested and works as required by the problem statement.

Code:

<?php

$temperature = array("1"=>"45", "2"=>"40" ,"3"=>"39" ,"29"=>"41" ,"30"=>"41" ,"31"=>"43");

asort($temperature);
echo "Min Values<br>";
$i=0;
foreach($temperature as $x => $x_value) {
    echo "Date=" . $x . ", Temperature=" . $x_value;
    echo "<br>";
    if(++$i==5) break;
}
echo "<br>";

arsort($temperature);
echo "Max Values<br>";
$i=0;
foreach($temperature as $x => $x_value) {
    echo "Date=" . $x . ", Temperature=" . $x_value;
    echo "<br>";
    if(++$i==5) break;
}
?>