title: How would I loop through the NSMuttableArray, to check if an ID is same with a particular user id.?
body: <p>I want a looping concept in order to find whether an id in my code is matched or same as that of already present in the <code>array</code>.(for example I want to check whether the id 12345 is present in the following <code>NSMutableArray</code>)
  and  also wants to know on which index path it has occurred and how to change that</p>
  
  <pre><code>{
      artist = "Green Day";
      id = 1421768;
      name = "American Idiot";
      releasedate = "21 Sep 2004";
      runningtime = "57.53";
      tracks = "1: American Idiot\n2: Jesus of Suburbia\n3: Holiday/Boulevard Of Broken Dreams\n4: Are We The Waiting/St. Jimmy\n5: Give Me Novacaine/She's A Rebel\n6: Extraordinary Girl/Letterbomb\n7: Wake Me Up When September Ends\n8: Homecoming\n9: Whatsername\n";
      trackscount = 9;
      type = 1;
  },
      {
      artist = Bastille;
      id = 309124896;
      name = "Bad Blood";
      releasedate = "1 Mar 2013";
      runningtime = "43.98";
      tracks = "1: Pompeii\n2: Things We Lost in the Fire\n3: Bad Blood\n4: Overjoyed\n5: These Streets\n6: Weight of Living, Pt. II\n7: Icarus\n8: Oblivion\n9: Flaws\n10: Daniel in the Den\n11: Laura Palmer\n12: Get Home\n13: Weight of Living, Pt. I\n";
      trackscount = 13;
      type = 1;
  },
      {
      artist = "Lacuna Coil";
      id = 2025689;
      name = Comalies;
      releasedate = "16 Oct 2012";
      runningtime = "51.75";
      tracks = "1: Swamped\n2: Heaven's a Lie\n3: Daylight Dancer\n4: Humane\n5: Self Deception\n6: Aeon\n7: Tight Rope\n8: The Ghost Woman and the Hunter\n9: Unspoken\n10: Entwined\n11: The Prophet Said\n12: Angels Punishment\n13: Comalies\n";
      trackscount = 13;
      type = 1;
  }
  </code></pre>