bonfire: Where art thou Incomplete

// Bonfire: Where art thou
// Author: @harshitanand
// Challenge: http://www.freecodecamp.com/challenges/bonfire-where-art-thou
// Learn to Code at Free Code Camp (www.freecodecamp.com)

function isSuper(a,b){
  var l=b.length,i=0,c;
  if(l>a.length){return false;}
  else{
    for(i;i<l;i++){
      c=a.indexOf(b[i]);
      if(c>-1){
        a.splice(c,1);
      }
      else{return false;}
    }
    return true;
  }
}

function where(collection, source) {
  var arr = [];
  var sourcekey = Object.keys(source);

  for ( var i = 0; i < collection.length; i++ ) {
    var collectionkey = Object.keys(collection[i]);
    if ((isSuper(collectionkey,sourcekey)) || (collectionkey.length >= sourcekey.length)){
      if ( collection[i][sourcekey] === source[sourcekey] ) {
        arr.push(collection[i]);
      }
    }  
  }
  return arr;
}
where([{ "a": 1, "b": 2 }, { "a": 1 }, { "a": 1, "b": 2, "c": 2 }], { "a": 1, "c": 2 });