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To compile with Homebrew-installed LLVM:

PATH=/usr/local/opt/llvm/bin:$PATH crystal build crystal-tags.cr

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YARD CHEATSHEET http://yardoc.org

cribbed from http://pastebin.com/xgzeAmBn

Templates to remind you of the options and formatting for the different types of objects you might want to document using YARD.

Modules

Namespace for classes and modules that handle serving documentation over HTTP

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arr = [[{:name=>"one", :enabled=>true}, 
        {:name=>"two", :enabled=>false}], 
  
        [{:name=>"one", :enabled=>true},
        {:name=>"two", :enabled=>true}]
      ]

a = arr.flatten.inject(Hash.new(true)) do |result, element|
  result[element[:name]] &&= element[:enabled]
  result

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# note that this is gross
findPos = (obj) ->
  values = while (obj = obj.offsetParent)
             [obj.offsetLeft, obj.offsetTop]
  _.reduce(values, (sums, pair) ->
    left: sums.left + pair[0]
    right: sums.right + pair[1]
  left: 0, top: 0)