more efficient string checking

lib/eventvat.js

@@ -352,7 +352,7 @@
   // Get a substring of the string stored at a key
   //
   EventVat.prototype.getrange = function(key, start, end) {
-    if (has(this.hash, key) && this.type(key) === 'string') {
+    if (this.type(key) === 'string') {
       var value = this.hash[key].value.slice(start, end);
       this.emit('getrange ' + key, value);
       this.emit('getrange', key, value);
@@ -539,7 +539,7 @@
   // Set the value of a string within the given range
   //
   EventVat.prototype.setrange = function(key, offset, value) {
-    if (has(this.hash, key) && this.type(key) === 'string') {
+    if (this.type(key) === 'string') {
       var p1 = this.hash[key].value.slice(0, offset);
       var p2 = this.hash[key].value.slice(offset + value.length);
       var newValue = p1 + value + p2;
@@ -560,7 +560,7 @@
   // Get the length of the value stored in a key
   //
   EventVat.prototype.strlen = function(key) {
-    if(has(this.hash, key) && this.type(key) === 'string') {
+    if(this.type(key) === 'string') {
       var l = this.hash[key].value.length;
       this.emit('strlen ' + key, l);
       this.emit('strlen', key, l);