javascript - In jquery each Loop from json object How (make loop find a value from object and compare to another object value to not repeat a print)? -


hi guys developing music player , i'm using json store id3 or aka "mp3 metadata". problem i'm confronting i'm extracting object , traingf see if can compare value , if both object have same value don't not repeat print. in case want artist 1 time not 2 infinity repeat in

  • .

    this json file example; 

    [ {        "artist": "",     "album": "",     "year":"",     "genre": "",      "song": "",     "location": "",     "track": "",     "img": "",     "composer":"" },     {        "artist": "the rolling stones",     "album": "hot rocks (1964-1971)",     "year":"2002",     "genre": "rock",      "song": "heart of stone",     "location": "scr/music/therollingstones/heartofstone.mp3",     "track": "2",     "img": "scr/music/therollingstones/img/hotrocks.jpg",     "record":"sony music" },     {        "artist": "the rolling stones",     "album": "hot rocks (1964-1971)",     "year":"2002",     "genre": "rock",      "song": "sympathy devil",     "location": "scr/music/therollingstones/sympathyforthedevil.mp3",     "track": "15",     "img": "scr/music/therollingstones/img/hotrocks.jpg",     "record":"sony music" },          {        "artist": "led zeppelin",     "album": "the complete led zeppelin",     "year":"2007",     "genre": "rock",      "song": "good times bad times",     "location": "scr/music/ledzeppelin/goodtimesbadtimes.mp3",     "track": "1",     "img": "scr/music/ledzeppelin/img/the complete led zeppelin.jpg",     "record":"atlantic records" }  ]

    javascript document 

        $.getjson('scr/json/musicdata.json', function(data){         var output = '<ol>';              data.sort(function(a, b){              return [a.artist] < [b.artist] ?  0 : 1;          });//end of sort artist            $.each(data, function(key,val) {           if(val.artist != ""){           if(preartis != val.artist){          output += '<li><a class="songname" href="#" data-src="'+ val.location +'">' + val.artist + '</a></li>';             var presong = val.artist ;          }//end of presong != song         }//end of val.artist              });//end of each           output += '</ol>';         $("#wrapper").append(output);         });//end of getjson

    html

    thanks in advances

    • try

    var songs = {}; $.each(data, function(key,val) {     if(val.artist != ""){         var key = val.artist + '@' + val.album;         if(!songs[key]){             output += '<li><a class="songname" href="#" data-src="'+ val.location +'">' + val.artist + '</a></li>';             songs[key] = true ;         }//end of presong != song     }//end of val.artist      });//end of each  output += '</ol>'; $("#wrapper").append(output);

    demo: fiddle

    you can change key find unique combination. ex: if want unique combination of artist, album , song use var key = val.artist + '@' + val.album + val.song;


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