Class: Hash

Inherits:
Object
  • Object
show all
Defined in:
lib/helpers/hash_helpers.rb

Overview

from Facets via Hashery

Instance Method Summary collapse

Instance Method Details

#rekey(*args, &block) ⇒ Object 



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# File 'lib/helpers/hash_helpers.rb', line 25

def rekey(*args, &block)
  dup.rekey!(*args, &block)
end

#rekey!(*args, &block) ⇒ Object 



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# File 'lib/helpers/hash_helpers.rb', line 8

def rekey!(*args, &block)
  # for backward comptability (TODO: DEPRECATE).
  block = args.pop.to_sym.to_proc if args.size == 1
  if args.empty?
    block = lambda{|k| k.to_sym} unless block
    keys.each do |k|
      nk = block[k]
      self[nk]=delete(k) if nk
    end
  else
    raise ArgumentError, "3 for 2" if block
    to, from = *args
    self[to] = self.delete(from) if self.has_key?(from)
  end
  self
end