FIND LOWEST DOLLAR AMOUNT IN ARRAY?

[nikko50]

So if I have the below array I would like to find the smallest dollar amount >0. I would like it to return the key and not the dollar value. So the below should return JOHN as the lowest dollar amount. How can it be done?

Tracy🙂

$arr = array(
        "FRED" => "1.11", 
        "JOHN" => "0.99",
        "MARY" => "10.99",
        "JOE"  => "0.00" );

[bretticus]

Initialize a variable that will hold the lowest possible value. Iterate through the loop (see foreach. Hint use the foreach loop to separate associate keys and values $key => $value.) Then use an if statement to see if the current array value is greater than 0. Now use a comparison operator to see whether the the current array value is less than the last one (hint: set the variable holding the lowest possible value on the first pass of your loop.) If the current value is lower than the last one, set the variable holding the lowest possible value to the current array value. You may want to set two variables, one for the LPV and one for the associated key that you need.

[johanafm]

Or do it the lazy way with
asort
key
current

Which I actually believe will be faster as well if you're dealing with larger data sets and need to care about it. Do profile it to be certain though.

[Installer]

$arr = array("FRED" => "1.11", 
             "JOHN" => "0.99",
             "MARY" => "10.99",
             "JOE"  => "0.00" );
asort($arr, SORT_ASC);
foreach ($arr as $key => $val) {
    if ($val > 0) {
        echo $key . ', WAKE UP!!!<br />';
        break;
    }
}

[Weedpacket]

Or [man]array_filter[/man] to remove the zero values, [man]min[/man] to get the minimum value, and [man]array_search[/man] (or [man]array_keys[/man]) to find the key (or keys) that correspond to that minimum.