[GitHub] willholley commented on issue #1295: View MapFunction incorrect date parsing

[GitBox <gi...@apache.org>]

willholley commented on issue #1295: View MapFunction incorrect date parsing
URL: https://github.com/apache/couchdb/issues/1295#issuecomment-385025518
 
 
   @tudordumitriu I think the issue is that `setDate` is modifying the date object in place, changing the value after you've called `emit`. Instead, ensure you call `setDate` on a new Date object:
   
   ```
   function (doc) {
     if(doc.startDateTime){ 
       var currentDateTime = new Date(doc.startDateTime);          
       emit(currentDateTime, -1);
       var currentOccurenceNo = 0;
       
       while (currentOccurenceNo < 4) 
       {
         var newDateTime = new Date();
         newDateTime.setDate(currentDateTime.getDate() + 1);
         emit(newDateTime, currentOccurenceNo);
         currentDateTime = newDateTime;
         currentOccurenceNo ++;
       }
     }
   }
   ```

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