Class: HashBuilder

Inherits:
BasicObject
Defined in:
lib/standard/facets/hash_builder.rb

Overview

HashBuilder takes a procedure and builds a Hash out of it.

The procedure must conform to a set of rules to be useful in this respect. They must either take an argument and use that argument to set values, or if no argument is taken then ‘#instance_eval` is used to evaluate the procedure such that each method represents a key.

Instance Method Summary collapse

Constructor Details

#initialize(hash = {}, &block) ⇒ HashBuilder

Returns a new instance of HashBuilder.



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# File 'lib/standard/facets/hash_builder.rb', line 11

def initialize(hash={}, &block)
  @hash = hash

  case block.arity
  when 0
    instance_eval(&block)
  else
    block.call(self)
  end
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(s, *a, &b) ⇒ Object 



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# File 'lib/standard/facets/hash_builder.rb', line 28

def method_missing(s, *a, &b)
  m = s.to_s
  if a.empty? && !b
    @hash[m.to_sym]
  else
    if b
      @hash[m.chomp('=').to_sym] = HashBuilder.new(&b).to_h
    else
      if a.size > 1
        @hash[m.chomp('=').to_sym] = a
      else
        @hash[m.chomp('=').to_sym] = a.first
      end
    end
  end
end

Instance Method Details

#to_h ⇒ Object 



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# File 'lib/standard/facets/hash_builder.rb', line 23

def to_h
  @hash
end