Method: Hash#subset

Defined in:

lib/rwd/ruby.rb

#subset(fields, values, results = nil, exact = true, emptyline = nil, joinwith = nil) ⇒ Object

# File 'lib/rwd/ruby.rb', line 598

def subset(fields, values, results=nil, exact=true, emptyline=nil, joinwith=nil)
  fields	= [fields]		unless fields.kind_of? Array
  values	= [values]		unless values.kind_of? Array
  results	= [results]		unless results.kind_of? Array
  emptyline	= emptyline.downcase	unless emptyline.nil?
  res		= self.dup
  res.delete_if {true}

  self.each do |k, l|
    ok	= true

    case l.class.to_s
    when "String"
      c		= l.splitwords
      correction	= 1
      joinwith	= " "	if joinwith.nil?
    when "Array"
      c		= l
      correction	= 0
    end

    #catch :stop do
      values2	= values.dup
      fields.each do |f|
        v	= values2.shift
        v	= v.downcase	unless v.nil?
        if emptyline.nil? or (not v == emptyline)
          if exact
            unless (v.nil? or c[f-correction].downcase == v)
              ok	= false
              #throw :stop
            end
          else
            unless (v.nil? or c[f-correction].downcase.include?(v))
              ok	= false
              #throw :stop
            end
          end
        end
      end
    #end

    if ok
      res2	= []
      if results == [nil]
        res2	= c
      else
        results.each do |n|
          res2 << c[n-correction]
        end
      end
      res2	= res2.join(joinwith)	unless joinwith.nil?
      res[k]	= res2
    end
  end

  return res
end