Module: Nuggets::Hash::DeprocMixin

Included in:
Hash
Defined in:
lib/nuggets/hash/deproc_mixin.rb

Instance Method Summary collapse

Instance Method Details

#deproc ⇒ Object

call-seq:

hash.deproc -> aProc
hash.deproc { |proc| ... } -> anObject

Removes the default proc from hash. If a block is given, yields the proc to the block, restores the default proc afterwards and returns the block’s return value. Otherwise, returns the proc.

Example:

h = Hash.new { |h, k| h[k] = [] }
h.deproc { |_h| Marshal.dump(_h) }  #=> ...dump data...
h.default_proc  #=> #<Proc:...>

NOTE: Requires Ruby >= 2.0



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# File 'lib/nuggets/hash/deproc_mixin.rb', line 46

def deproc
  default_proc, self.default_proc = self.default_proc, nil
  return default_proc unless block_given?

  begin
    yield self
  ensure
    self.default_proc = default_proc
  end
end

#deproc! ⇒ Object

call-seq:

hash.deproc! -> _hash_ or nil

Removes the default proc from hash, if present, and returns hash. Otherwise, returns nil.

Example:

h = Hash.new { |h, k| h[k] = [] }
Marshal.dump(h.deproc!)  #=> ...dump data...
h.default_proc  #=> nil

NOTE: Requires Ruby >= 2.0



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# File 'lib/nuggets/hash/deproc_mixin.rb', line 70

def deproc!
  return unless default_proc

  self.default_proc = nil
  self
end