Module: Bai2::AttrReaderFromIvarHash

Included in:
BaiFile, BaiFile::Account, BaiFile::Group, BaiFile::Transaction
Defined in:
lib/bai2/attr-reader-from-ivar-hash.rb

Overview

Helps define methods that simply read from a hash ivar. For example, imagine this class:

class Person
  def initialize
    @info = {
      first_name: 'John',
      last_name:  'Smith',
    }
  end
  attr_reader_from_ivar_hash :@info, :first_name, :last_name
end

That last statement will automagically create methods ‘.first_name`, and `.last_name` on `Person`, which saves a whole bunch of typing :).

Instance Method Summary collapse

Instance Method Details

#attr_reader_from_ivar_hash(ivar, *keys) ⇒ Object 



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# File 'lib/bai2/attr-reader-from-ivar-hash.rb', line 23

def attr_reader_from_ivar_hash(ivar, *keys)
  keys.each do |key|
    define_method(key) do
      (instance_variable_get(ivar) || {})[key]
    end
  end
end