Lookup table-like mixin for retrieving data from a linked list. Ideal for including predefined font stacks and media queries, by name. Great way to avoid lengthy conditional statements when you require multiple outcomes from a mixin.

gistfile1.sass

@function get-item-by-name( $name, $names-list, $items ){
	@return #{ nth( $items, index( $names-list, $name ) ) };
}

$font-stack-ids: proxima-light, proxima-regular, proxima-semibold 
$font-stacks: 	"'Proxima Nova Light', Tahoma, Arial, Helvetica, sans-serif",
		"'Proxima Nova Regular', Tahoma, Arial, Helvetica, sans-serif",
		"'Proxima Nova Semibold', Tahoma, Arial, Helvetica, sans-serif";

@function font-stack( $name ){
	@return get-item-by-name( $name, $font-stack-ids, $font-stacks );
}

gistfile2.scss

.main{
	font-family: font-stack(proxima-light);
	
	float: none;
	width: auto;	
}