Module: EagleClaw::ConstantMatcher

Included in:
Formatters, Scrapers
Defined in:
lib/eagleclaw/constmatch.rb

Overview

Mixin to allow an object to act as a case-insensitive hash against its own constants. This should be used with singleton metaclasses, like so:

class MyClass
  class << self
    include EagleClaw::ConstantMatcher
  end
end

Instance Method Summary collapse

Instance Method Details

#[](constant) ⇒ Object

Retrieve the constant for the given symbol. Matching will be performed case-insensitively.

Examples:

Get the JSON EagleClaw formatter

EagleClaw::Formatters[:json] => EagleClaw::Formatters::JSON

Parameters:

  • constant (Symbol) —

    A symbol referring to the constant to get.

Raises:

  • (NameError) 


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# File 'lib/eagleclaw/constmatch.rb', line 23

def [](constant)
  constants.each do |const|
    return const_get(const) if const.to_s.downcase == constant.to_s.downcase
  end
  raise NameError, "Constant #{constant.inspect} not found"
end