Ruby to_h

gistfile1.rb

###

module Enumerable 
  # maps an array into a hash
  def to_h(&block)
    inject({}) {|hash, *v| block.call(hash, *v); hash}
  end
end

class NilClass
  def to_h; {}; end
end

###

# Examples

a = [:a, :b, :c, nil].to_h do |hash, v|
  hash[v] = 1 if v
end
# => {:a=>1, :b=>1, :c=>1}

b = "name:Jake\nage:20\nlanguage:Englsh".split("\n").to_h do |hash, line|
  line.match(/^(.+):(.+)$/) and hash[$1.to_sym] = $2
end
# => {:name=>"Jake", :age=>"20", :language=>"Englsh"}

c = Dir.glob("*.rb").to_h do |hash, filename|
  hash[filename] = IO.read(filename)
end
# => {"example.rb"=>"...", "example2.rb"=>"..."}