restoring order, if necessary

atlefren · Oct 26, 2013 · fd014c7 · fd014c7
1 parent 9ba379f
commit fd014c7
Showing 1 changed file with 12 additions and 2 deletions.
diff --git a/src/feature.js b/src/feature.js
@@ -113,13 +113,15 @@ var SOSI = window.SOSI || {};
 
         initialize: function (elements, head) {
             this.head = head;
+            this.index = [];
             this.features = _.object(_.map(elements, function (value, key) {
                 key = key.replace(":", "").split(/\s+/);
                 var data = {
                     id: parseInt(key[1], 10),
                     geometryType: key[0],
                     lines: _.rest(value)
                 };
+                this.index.push(data.id);
                 return [data.id, new ns.Feature(data, head.origo, head.enhet)];
             }, this));
         },
@@ -135,12 +137,20 @@ var SOSI = window.SOSI || {};
             return _.size(this.features);
         },
 
+        at: function(i) {
+          return this.ensureGeom(this.features[this.index[i]]);
+        },
+
         getById: function (id) {
             return this.ensureGeom(this.features[id]);
         },
 
-        all: function () {
-            return _.map(this.features, this.ensureGeom, this);
+        all: function (ordered) {
+            if (ordered) {
+              return _.map(this.index, this.getById, this); /* order comes at a 25% performance loss */ 
+            } else {
+              return _.map(this.features, this.ensureGeom, this);
+            }
         }
     });