Added some method for us unemployment example

lib/data-series.js

@@ -14,7 +14,7 @@ jvm.DataSeries = function(params, elements) {
     this.setAttributes(params.attributes);
   }
 
-  this.scale = new scaleConstructor(params.scale, params.normalizeFunction, params.valueMin, params.valueMax);
+  this.scale = new scaleConstructor(params.scale, params.normalizeFunction, params.min, params.max);
   if (params.values) {
     this.values = params.values;
     this.setValues(params.values);
@@ -38,19 +38,25 @@ jvm.DataSeries.prototype = {
   },
 
   setValues: function(values) {
-    var max = 0,
+    var max = Number.MIN_VALUE,
         min = Number.MAX_VALUE,
         val,
         cc,
         attrs = {};
 
-    for (cc in values) {
-      val = parseFloat(values[cc]);
-      if (val > max) max = values[cc];
-      if (val && val < min) min = val;
+    if (!this.params.min || !this.params.max) {
+      for (cc in values) {
+        val = parseFloat(values[cc]);
+        if (val > max) max = values[cc];
+        if (val < min) min = val;
+      }
+    }
+    if (!this.params.min) {
+      this.scale.setMin(min);
+    }
+    if (!this.params.max) {
+      this.scale.setMax(max);
     }
-    this.scale.setMin(min);
-    this.scale.setMax(max);
 
     for (cc in values) {
       val = parseFloat(values[cc]);

lib/jvectormap.js

@@ -15,5 +15,69 @@ var jvm = {
         target.prototype[prop] = source.prototype[prop];
       }
     }
+  },
+
+  min: function(values){
+    var min = Number.MAX_VALUE,
+        i;
+
+    if (values instanceof Array) {
+      for (i = 0; i < values.length; i++) {
+        if (values[i] < min) {
+          min = values[i];
+        }
+      }
+    } else {
+      for (i in values) {
+        if (values[i] < min) {
+          min = values[i];
+        }
+      }
+    }
+    return min;
+  },
+
+  max: function(values){
+    var max = Number.MIN_VALUE,
+        i;
+
+    if (values instanceof Array) {
+      for (i = 0; i < values.length; i++) {
+        if (values[i] > max) {
+          max = values[i];
+        }
+      }
+    } else {
+      for (i in values) {
+        if (values[i] > max) {
+          max = values[i];
+        }
+      }
+    }
+    return max;
+  },
+
+  keys: function(object){
+    var keys = [],
+        key;
+
+    for (key in object) {
+      keys.push(key);
+    }
+    return keys;
+  },
+
+  values: function(object){
+    var values = [],
+        key,
+        i;
+
+    for (i = 0; i < arguments.length; i++) {
+      object = arguments[i];
+      for (key in object) {
+        values.push(object[key]);
+      }
+    }
+    return values;
   }
 };