I'm new to nodejs and mongodb. My problem is I've a json of following type

{ 

 _id: 199,

 name: 'Rae Kohout',

 scores: [ 

     { type: 'exam', score: 82.11742562118049 },

     { type: 'quiz', score: 49.61295450928224 },

     { type: 'homework', score: 28.86823689842918 },

     { type: 'homework', score: 5.861613903793295 }

 ]

}

Here I want to compare score for the type 'homework' and remove the homework which has lowest score.To solve this I've written some code like

var low = '';

for(var i=0;i<doc.scores.length;i++)

{

 if(doc.scores[i].type == 'homework'){

   if(low == ''){

      low = doc.scores[i].score;

   }

   if( doc.scores[i].score > low ){

     console.log(index for lowest score is  + i);

     low = '';

   }

 }

}

Now I'm able to find the index for the lowest score, and want to removes values at that index. I tried to use Array.splice() method but that works on Array only. can anyone help me to solve it ?