diff --git a/source/Ox/js/String.js b/source/Ox/js/String.js
index 9b2f5ef9..2650a768 100644
--- a/source/Ox/js/String.js
+++ b/source/Ox/js/String.js
@@ -36,14 +36,15 @@ Ox.clean = function(string) {
 };
 
 /*@
-Ox.endsWith <f> Checks if a string ends with a given substring
-    If the substring is a string literal (and not a variable),
-    `/sub$/.test(str)` or `!!/sub$/.exec(str)` is shorter than `Ox.ends(str,
-    sub)`.
+Ox.endsWith <f> Tests if a string ends with a given substring
+    Equivalent to `new RegExp(Ox.escapeRegExp(substring) + '$').test(string)`.
+    (string, substring) -> <b> True if string ends with substring
     > Ox.endsWith('foobar', 'bar')
     true
+    > Ox.endsWith('foobar', 'foo')
+    false
 @*/
-Ox.ends = Ox.endsWith = function(string, substring) {
+Ox.endsWith = function(string, substring) {
     string = string.toString();
     substring = substring.toString();
     return string.slice(string.length - substring.length) == substring;
@@ -100,14 +101,15 @@ Ox.pad <f> Pad a string to a given length
     'foo'
     > Ox.pad('foobar', 'left', 3)
     'bar'
+    > Ox.pad('foo', -1)
+    ''
 @*/
 Ox.pad = function(string, position, length, padding) {
-    // fixme: weird for negative numbers
     var hasPosition = Ox.isString(arguments[1]),
         isNumber = Ox.isNumber(arguments[0]),
         last = Ox.last(arguments);
     position = hasPosition ? arguments[1] : isNumber ? 'left' : 'right';
-    length = hasPosition ? arguments[2] : arguments[1];
+    length = Math.max(hasPosition ? arguments[2] : arguments[1], 0);
     padding = Ox.isString(last) ? last
         : isNumber && position == 'left' ? '0' : ' ';
     string = string.toString();
@@ -410,15 +412,15 @@ Ox.splice = function(string, index, remove) {
 };
 
 /*@
-Ox.startsWith <f> Checks if a string starts with a given substring
-    If the substring is a string literal (and not a variable),
-    `/^sub/.test(str)` or `!!/^sub/.exec(str)` is shorter than `Ox.starts(str,
-    sub)`.
+Ox.startsWith <f> Tests if a string ends with a given substring
+    Equivalent to `new RegExp('^' + Ox.escapeRegExp(substring)).test(string)`.
+    (string, substring) -> <b> True if string starts with substring
     > Ox.startsWith('foobar', 'foo')
     true
+    > Ox.startsWith('foobar', 'bar')
+    false
 @*/
-Ox.starts = Ox.startsWith = function(string, substring) {
-    // fixme: rename to starts
+Ox.startsWith = function(string, substring) {
     string = string.toString();
     substring = substring.toString();
     return string.slice(0, substring.length) == substring;