Module: Kernel

Defined in:
lib/core_extensions/kernel.rb

Instance Method Summary collapse

Instance Method Details

#with_locals(locals = {}, &block) ⇒ Object

yields an alternate reality block where instance methods are different from what they were. At the end of the block it resets the initial values of the instance variables.



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# File 'lib/core_extensions/kernel.rb', line 5

def with_locals locals = {}, &block
  old_local_vars = {}

  for k, v in locals
    var = :"@#{k}"
    old_local_vars[k] = instance_variable_get(var)
    instance_variable_set( var, v )
  end

  yield
ensure      # make all as it once was
  for k, v in old_local_vars
    var = :"@#{k}"
    instance_variable_set( var, v )
  end
end