Collapse mixin

collapse.css

.column-left-no-important {
  padding-left: 0 ; }

.column-left-important {
  padding-left: 0 !important; }

.column-no-important {
  padding-left: 0 ;
  padding-right: 0 ; }

.column-important {
  padding-left: 0 !important;
  padding-right: 0 !important; }

collapse.scss

@mixin collapse($side, $important: false) {
 	@if $important {
 		$flag: "!important";
 	}
 	@else {
 		$flag: "";
 	}
    @if $side==both {
        padding-left: 0 #{$flag};
        padding-right: 0 #{$flag};
    }
    @else {
        padding-#{$side}: 0 #{$flag};
    }
}

.column-left-no-important {
    @include collapse(left);
}
.column-left-important {
	@include collapse(left, true);
}
.column-no-important {
    @include collapse(both);
}
.column-important {
	@include collapse(both, true);
}