--- !ruby/object:RI::MethodDescription 
aliases: []

block_params: 
comment: 
- !ruby/struct:SM::Flow::P 
  body: Passes each element of the collection to the given block. The method returns <tt>true</tt> if the block returns <tt>true</tt> exactly once. If the block is not given, <tt>one?</tt> will return <tt>true</tt> only if exactly one of the collection members is true.
- !ruby/struct:SM::Flow::VERB 
  body: "   %w{ant bear cat}.one? {|word| word.length == 4}   #=&gt; true\n   %w{ant bear cat}.one? {|word| word.length &gt; 4}    #=&gt; false\n   %w{ant bear cat}.one? {|word| word.length &lt; 4}    #=&gt; false\n   [ nil, true, 99 ].one?                            #=&gt; false\n   [ nil, true, false ].one?                         #=&gt; true\n"
full_name: Enumerable#one?
is_singleton: false
name: one?
params: |
  enum.one? [{|obj| block }]   => true or false

visibility: public