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

block_params: 
comment: 
- !ruby/struct:SM::Flow::P 
  body: Returns the key for a given value. If not found, returns <tt>nil</tt>.
- !ruby/struct:SM::Flow::VERB 
  body: "   h = { &quot;a&quot; =&gt; 100, &quot;b&quot; =&gt; 200 }\n   h.index(200)   #=&gt; &quot;b&quot;\n   h.index(999)   #=&gt; nil\n"
full_name: Hash#index
is_singleton: false
name: index
params: |
  hsh.index(value)    => key

visibility: public

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