Sass snippets – useful mixins that Compass doesn't already define

Sass_snippets.sass

@mixin all-but-first($property, $normal-value, $value-for-first: 0)
	#{$property}: $normal-value
	&:first-child
		#{$property}: $value-for-first

@mixin all-but-last($property, $normal-value, $value-for-last: 0)
	// won't work in IE8 or below; :last-child not supported
	#{$property}: $normal-value
	&:last-child
		#{$property}: $value-for-last


// remember that an alternative to these in certain cases is $property: $val1 $val2
@mixin both-vertical($property, $value)
	#{$property}-top: $value
	#{$property}-bottom: $value
@mixin both-horizontal($property, $value)
	#{$property}-right: $value
	#{$property}-left: $value


@mixin horizontally-centered-using-margins
	+both-horizontal(margin, auto)