Class: Stamp::Emitters::Composite

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/stamp/emitters/composite.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(emitters = []) ⇒ Composite

Returns a new instance of Composite.



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# File 'lib/stamp/emitters/composite.rb', line 8

def initialize(emitters=[])
  @emitters = emitters
end

Instance Attribute Details

#emitters ⇒ Object (readonly)

Returns the value of attribute emitters.



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# File 'lib/stamp/emitters/composite.rb', line 6

def emitters
  @emitters
end

Instance Method Details

#-(others) ⇒ Object 



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# File 'lib/stamp/emitters/composite.rb', line 38

def -(others)
  emitters - Array(others)
end

#<<(emitter) ⇒ Object 



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# File 'lib/stamp/emitters/composite.rb', line 30

def <<(emitter)
  Array(emitter).each { |e| emitters << e }
end

#each(&block) ⇒ Object 



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# File 'lib/stamp/emitters/composite.rb', line 34

def each(&block)
  emitters.each(&block)
end

#format(target) ⇒ Object 



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# File 'lib/stamp/emitters/composite.rb', line 12

def format(target)
  # NOTE using #each to build string because benchmarking shows
  # that it's ~20% faster than .map.join('')
  result = ''
  emitters.each { |e| result << e.format(target).to_s }
  result
end

#replace_each! ⇒ Object

Replace each element as we iterate with the result of the given block.



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# File 'lib/stamp/emitters/composite.rb', line 43

def replace_each!
  emitters.each_with_index do |emitter, index|
    emitters[index] = yield(emitter)
  end

  self
end

#strftime_format ⇒ Object

Builds the equivalent strftime format string.

Raises:

  • (ArgumentError) —

    if any emitter has no strftime equivalent



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# File 'lib/stamp/emitters/composite.rb', line 23

def strftime_format
  emitters.map do |e|
    e.strftime_directive ||
      raise(ArgumentError, "#{e.class.name.split('::').last} (e.g. \"1st\") has no strftime equivalent")
  end.join
end