title: Create array of dictionaries in objective c
body: <p>I am fetching dictionaries from my local database.
  My database array with name <strong>aryTitle_DB</strong> structure is as mentioned below.</p>
  
  <blockquote>
    <p>(    {
            "date":13/9/2014;
    "title"="abc"
    },    {  "date":13/9/2014;
    "title"="def"  },    {  "date":13/9/2014;
    "title"="ghi"  },    {"date":14/9/2014;
    "title"="abc"    },    { "date":15/9/2014;
    "title"="abc"   },     { "date":15/9/2014;
    "title"="def"   })</p>
  </blockquote>
  
  <p>I need following type of array structure from <strong>aryTitle_DB</strong></p>
  
  <blockquote>
    <p>(    { "13/9/2014":("abc","def","ghi")   },    {  "14/9/2014":("abc")  },    { "15/9/2014":("abc","def")   } )</p>
  </blockquote>
  
  <p>I did lot of search in stack overflow and in other tutorials but unable to find it.
  please help to create such kind of array structure.
  Help will be appreciable.</p>