1 files changed, 24 insertions, 0 deletions
diff --git a/js/string.js b/js/string.js
new file mode 100644
index 0000000..fa25527
--- /dev/null
+++ b/js/string.js
@@ -0,0 +1,24 @@
+/**
+ * Strips all leading and ending whitespaces.
+ * @returns the trimmed string.
+ */
+function trim() {
+	var str = this.replace(/^\s+/, "");
+	var ws = /\s/;
+	var i = str.length;
+	while (ws.test(str.charAt(--i)));
+	return str.slice(0, i + 1);
+}
+
+/**
+ * Checks whether a string is empty or not.
+ * The string is trimmed before checking if the length is 0.
+ * @return <code>true</code> if the trimmed string has a length of 0.
+ */
+function isEmpty() {
+	var testString = this.trim();
+	return 0 == testString.length;
+}
+
+String.prototype.trim = trim;
+String.prototype.isEmpty = isEmpty;
+\ No newline at end of file