Module: Enumerable
- Defined in:
- lib/ruby_peter_v/single.rb
Instance Method Summary collapse
Instance Method Details
#single(&block) ⇒ Object
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# File 'lib/ruby_peter_v/single.rb', line 5 def single(&block) filtered = block_given? ? self.select(&block) : self if filtered.respond_to?(:size) _size = filtered.size = _size else _size = filtered.first(2).size = "greater than 1 (on Enumerable, the size cannot be calculated)" end raise RubyPeterV::UniquenessError, "size of collection was #{}." if _size > 1 filtered.first end |