Class: Preserves::Selection

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/preserves/selection.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(domain_objects) ⇒ Selection

Returns a new instance of Selection.



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# File 'lib/preserves/selection.rb', line 8

def initialize(domain_objects)
  self.domain_objects = domain_objects
end

Instance Attribute Details

#domain_objects ⇒ Object

Returns the value of attribute domain_objects.



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# File 'lib/preserves/selection.rb', line 6

def domain_objects
  @domain_objects
end

Instance Method Details

#[](index) ⇒ Object 



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# File 'lib/preserves/selection.rb', line 60

def [](index)
  domain_objects[index]
end

#each(&block) ⇒ Object 



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# File 'lib/preserves/selection.rb', line 12

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

#first ⇒ Object 



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# File 'lib/preserves/selection.rb', line 20

def first
  domain_objects.first
end

#first! ⇒ Object 



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# File 'lib/preserves/selection.rb', line 24

def first!
  fail "expected at least 1 result" if size == 0
  domain_objects.first
end

#last ⇒ Object 



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# File 'lib/preserves/selection.rb', line 38

def last
  domain_objects.last
end

#last! ⇒ Object 



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# File 'lib/preserves/selection.rb', line 42

def last!
  fail "expected at least 1 result" if size == 0
  domain_objects.last
end

#only ⇒ Object Also known as: one 



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# File 'lib/preserves/selection.rb', line 47

def only
  fail "expected only 1 result" if size > 1
  domain_objects.first
end

#only! ⇒ Object Also known as: one! 



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# File 'lib/preserves/selection.rb', line 52

def only!
  fail "expected exactly 1 result" if size != 1
  domain_objects.first
end

#second ⇒ Object 



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# File 'lib/preserves/selection.rb', line 29

def second
  domain_objects.second
end

#second! ⇒ Object 



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# File 'lib/preserves/selection.rb', line 33

def second!
  fail "expected at least 1 result" if size == 0
  domain_objects.second
end

#size ⇒ Object 



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# File 'lib/preserves/selection.rb', line 16

def size
  domain_objects.size
end