From c73d53f50aa2703dafee25af4f82a216e0d46177 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Wed, 24 Jun 2015 03:48:39 +0530
Subject: [PATCH] Add String.startsWith and String.endsWith

---
 src/duktape/__init__.py | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/src/duktape/__init__.py b/src/duktape/__init__.py
index ff8d36cc43..50b917f2ab 100644
--- a/src/duktape/__init__.py
+++ b/src/duktape/__init__.py
@@ -111,7 +111,7 @@ class Context(object):
                     return this.replace(rtrim, '');
                     };
                 })();
-            }
+            };
             if (!String.prototype.trimLeft) {
                 (function() {
                     // Make sure we trim BOM and NBSP
@@ -120,7 +120,7 @@ class Context(object):
                     return this.replace(rtrim, '');
                     };
                 })();
-            }
+            };
             if (!String.prototype.trimRight) {
                 (function() {
                     // Make sure we trim BOM and NBSP
@@ -129,6 +129,23 @@ class Context(object):
                     return this.replace(rtrim, '');
                     };
                 })();
+            };
+            if (!String.prototype.startsWith) {
+                String.prototype.startsWith = function(searchString, position) {
+                position = position || 0;
+                return this.indexOf(searchString, position) === position;
+                };
+            }
+            if (!String.prototype.endsWith) {
+                String.prototype.endsWith = function(searchString, position) {
+                    var subjectString = this.toString();
+                    if (position === undefined || position > subjectString.length) {
+                        position = subjectString.length;
+                    }
+                    position -= searchString.length;
+                    var lastIndex = subjectString.indexOf(searchString, position);
+                    return lastIndex !== -1 && lastIndex === position;
+                };
             }
             Duktape.readfile = function(path, encoding) {
                 var x = Duktape.pyreadfile(path, encoding);