[Solved] Reordering array of objects into nested objects [closed]

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It seems that your requirement is to transpose the table and index by Class:

  • call the input “table”
  • call every element of the array “row”
  • for every year that is a key in at least one row, except the key Class
    • make year a key in output, mapping to the object:
      • each key in output[year] is the value class of Class in some row, mapping to the value:
        • output[year][class] = input.find("Class",class)[year]

This is one possible implementation:

 var input = [ {"2007": rank, "2008": rank, "Class": "label 1"}, 
               {"2007": rank, "2008": rank, "Class": "label 2"} ]
 //////////
 var yr, i;
 var output = {};
 for(i=0; i<input.length; i++){
   var row = input[i];
   for(yr in row){
     output[yr] = output[yr] || {};
     output[yr][row.Class] = row[yr];
   }
 }
 //////////////
 return output;

test: http://jsfiddle.net/aT5YG/1

If multiple rows have the same Class, the later rows overwrite the previous rows. If the nput was jagged, the output will be jagged.

solved Reordering array of objects into nested objects [closed]