Sass functions that extract a specified edge

sass_edge_functions

// Example:
//
// $padding: 1px 2px 3px;
//   top($padding) ...... 1px
//   right($padding) .... 2px
//   bottom($padding) ... 3px
//   left($padding) ..... 2px

@function top($args) {
	$len: length($args);
	@if ($len >= 1 and $len <= 4) {@return nth($args, 1);}
}
@function right($args) {
	$len: length($args);
	@if ($len == 1) {@return nth($args, 1);}
	@if ($len == 2) {@return nth($args, 2);}
	@if ($len == 3) {@return nth($args, 2);}
	@if ($len == 4) {@return nth($args, 2);}
}
@function bottom($args) {
	$len: length($args);
	@if ($len == 1) {@return nth($args, 1);}
	@if ($len == 2) {@return nth($args, 1);}
	@if ($len == 3) {@return nth($args, 3);}
	@if ($len == 4) {@return nth($args, 3);}
}
@function left($args) {
	$len: length($args);
	@if ($len == 1) {@return nth($args, 1);}
	@if ($len == 2) {@return nth($args, 2);}
	@if ($len == 3) {@return nth($args, 2);}
	@if ($len == 4) {@return nth($args, 4);}
}