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Contents
# From http://redcorundum.blogspot.com/2006/05/kernelqualifiedconstget.html
# Adapted into a module, rather than monkey patching it into Kernel
#
# Method to take a string constant name, including :: qualifications, and
# look up the actual constant. Looks up relative to current file.
# Respects leading ::. Etc.
#
# class Something
# include Traject::QualifiedConstGet
#
# def foo
# #...
# klass = qualified_const_get("Foo::Bar")
# #...
# end
# end
module Traject::QualifiedConstGet
def qualified_const_get(str)
path = str.to_s.split('::')
from_root = path[0].empty?
if from_root
from_root = []
path = path[1..-1]
else
start_ns = ((Class === self)||(Module === self)) ? self : self.class
from_root = start_ns.to_s.split('::')
end
until from_root.empty?
begin
return (from_root+path).inject(Object) { |ns,name| ns.const_get(name) }
rescue NameError
from_root.delete_at(-1)
end
end
path.inject(Object) { |ns,name| ns.const_get(name) }
end
end
Version data entries
50 entries across 50 versions & 1 rubygems