From http://jaydenseric.com/blog/fun-with-sass-and-font-icons

find_match_from_array.scss

// To simulate associative arrays
// Source: http://hugogiraudel.com/2013/08/12/sass-functions/#mapping
@function match($haystack, $needle) {
    @each $item in $haystack {
        $index: index($item, $needle);
        @if $index { 
            $return: if($index == 1, 2, $index);
            @return nth($item, $return); 
        }
    }
    @return false;
}