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   Hi,   
   When a lambda is used with say, a std::find_if algorithm, is it a good   
   idea to allow it to change some variable in the object?   
      
   That is, is the following a good practice?   
   std::find_if(std::begin(collection), std::end(collection), [&](thing t)   
   {   
     if (t == something)   
     {   
       return true;   
     }   
     ++row_number;   
     return false;   
   });   
      
   // perform some action based upon the row_number   
      
   I know that changing state in function predicates is considered a bad   
   idea because they may be copied by value and the state may, therefore,   
   be changed more than once which may lead to unexpected results.   
      
   Do the same considerations apply to lambdas as well? Doesn't the   
   compiler create a function out of lambda internally?   
      
   Thanks   
      
      
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