slim_sass_coffee

complex_sass

// http://thesassway.com/advanced/inverse-trigonometric-functions-with-sass

$default-threshold: pi() / 180 / 20

@function convert-angle($value, $unit-name)
  $factors: (rad: 1rad, deg: 180deg / pi(), grad: 200grad / pi(), turn: 0.5turn / pi())
  @if not unitless($value)
    @warn "`#{$value}` should be unitless"
    @return false
  @if not map-has-key($factors, $unit-name)
    @warn "unit `#{$unit-name}` is not a valid unit - please make sure it is either `deg`, `rad`, `grad` or `turn`"
    @return false
  @return $value * map-get($factors, $unit-name)

@function asin($z, $unit-name: deg, $threshold: $default-threshold)
  $sum: 0
  $complement: false
  $sign: if($z != 0, $z / abs($z), 1)
  $z: abs($z)
  @if $z > 1
    @warn "illegal `#{$z}` value for function"
    @return false
  @if $z > sin(pi() / 4)
    $complement: true
    $z: sqrt(1 - pow($z, 2))
  $term: $z
  $i: 0
  $k: 1
  @while $term > $threshold
    $sum: $sum + $term
    $i: $i + 1
    $k: $k * (2 * $i - 1) / (2 * $i)
    $j: 2 * $i + 1
    $term: $k * pow($z, $j) / $j
  @return convert-angle($sign * if($complement, pi() / 2 - $sum, $sum), $unit-name)

@function acos($z, $unit-name: deg, $threshold: $default-threshold)
  @return convert-angle(pi() / 2, $unit-name) - asin($z, $unit-name, $threshold)

@function atan($z, $unit-name: deg, $threshold: $default-threshold)
  @return asin($z / sqrt(1 + pow($z, 2)), $unit-name, $threshold)

sass

#calendar
  .title
    @extend .text-left
    display: inline-block
    h3
      font-size: 32px
      margin: 4px 0 0
  .controls
    @extend .btn-group
    float: right
    padding: 5px
    .previous
      @extend .btn
      @extend .btn-default
      padding-left: 14px
      i
        @extend .glyphicon
        @extend .glyphicon-chevron-left
        @extend .pull-left
        margin-top: 1px
    .next
      @extend .btn
      @extend .btn-default
      padding-right: 14px
      i
        @extend .glyphicon
        @extend .glyphicon-chevron-right
        @extend .pull-right
        margin-top: 1px
    .today
      @extend .btn
      @extend .btn-default

slim

#calendar
  .row
    .col-xs-12.col-sm-12.col-md-12
      .title
        h3
          = "#{calendar.month.to_s("%B")} #{calendar.year}"
      .controls
        = link_to calendar_path(calendar.previous.month), class: 'previous' do
          | Prev
          i
        = link_to 'Today', calendar_path(Date.today.strftime('%Y-%m')), class: 'today'
        = link_to calendar_path(calendar.next.month), class: 'next' do
          | Next
          i