ENH: FormHandler namespaces. Fixes #28

src/url.js

@@ -256,3 +256,21 @@ export function update(args, mode) {
   self.search = qparts.join('&')
   return self
 }
+
+
+export function namespace(search, name) {
+  // Return an object with all keys in search that begin with `<name>:` or
+  // do not have a `:` in them.
+  // If name is false-y, return search
+  if (!name)
+    return search
+  var result = {}
+  for (var key in search) {
+    var parts = key.split(':')
+    if (parts.length == 1)
+      result[parts[0]] = search[key]
+    else if (parts[0] === name)
+      result[parts[1]] = search[key]
+  }
+  return result
+}