[OpenLayers-Users] Re: remove a layer by name

[Armin Burger]

On 26/09/2011 05:31, Puneet Kishor wrote:

>
> The following code does what I want --
>
> 	var lyr_list = map.getLayersByName("a_layer");
>          if (typeOf(lyr_list) === "array") {
>          	for (var i in lyr_list) {
>                  	lyr_list[i].removeAllFeatures();
>                          removeLayer(lyr_list[i]);
>                  }
> 	}
>
 > Surely, the above couldn't be the most optimum way, could it?


it will not change anything for your particular case, but I usually 
reference layers via their ID. This requires to add the ID after creation.

something like

var myLayer = new OpenLayers.Layer...;
myLayer.addOptions({id:'theLayerId'});

then you can always access the layer later on like

var mapLayer = map.getLayer('theLayerId');


For completely deleting a layer it might be necessary to also run the 
.destroy() method on the layer, but I'm not sure when this is required 
and when not.

Regards
Armin