Javascript / Openlayers for loop not working -

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i'm creating map openlayers , having trouble getting features appear.

i want take array, , assign each coordinate it's own marker. relevant code (full code @ bottom of post): 

                var npctowns = [                     [ 533, mapy-966 ],                     [ 833, mapy-1766 ],                     [ 2000, mapy-500 ],                     [ 1500, mapy-1700 ]                  ];                 (var = 0; < npctowns.length; i++) {                      var lon = npctowns[i][0];                     var lat = npctowns[i][0];                      var npctownicons = new ol.feature({                         geometry: new ol.geom.point([lon,lat])                     });                     var iconstyle = new ol.style.style({                         image: new ol.style.icon ({                         anchor: [0, 0],                         anchorxunits: 'pixels',                         anchoryunits: 'pixels',                         opacity: 1,                         src: 'assets/img/icons/town.gif'                         })                     });                     var vectorsource = new ol.source.vector({                         features: [npctownicons]                         });                     var vectorlayer = new ol.layer.vector({                         source: vectorsource                         });                  };

i think running problem not assigning feature variable dynamically? not sure how fix it! appreciated!

full map code on jsfiddle: https://jsfiddle.net/dhaurhvj/

you need initialize vectorlayer outside for loop, map initialization can access vectorlayer.
need add features layer (because created before).

i think code should this:

var vectorsource = new ol.source.vector({features: [[]]}); var vectorlayer = new ol.layer.vector({     source: vectorsource }); var iconstyle = new ol.style.style({     image: new ol.style.icon ({         anchor: [0, 0],         anchorxunits: 'pixels',         anchoryunits: 'pixels',         opacity: 1,         src: 'assets/img/icons/town.gif'     }) }); (var = 0; < npctowns.length; i++) {                              var lon = npctowns[i][0];     var lat = npctowns[i][0];      var newicon = new ol.feature({         geometry: new ol.geom.point([lon,lat])     });      newicon.setstyle(iconstyle);     vectorsource.addfeature(newicon); };

you can populate array (newicon) features , initialize vectorlayer after loop , pass array it.


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