finish 58

Author: BaffinLee

58. Length of Last Word.js

@@ -0,0 +1,26 @@
+/**
+ * 58. Length of Last Word
+ * 
+ * Given a string s consists of upper/lower-case alphabets and empty space characters ' ', return the length of last word in the string.
+ * 
+ * If the last word does not exist, return 0.
+ * 
+ * Note: A word is defined as a character sequence consists of non-space characters only.
+ * 
+ * Example:
+ * 
+ * Input: "Hello World"
+ * Output: 5
+ */
+
+/**
+ * @param {string} s
+ * @return {number}
+ */
+var lengthOfLastWord = function(s) {
+	var str = s.trim();
+	var len = str.length;
+	var i = len - 1;
+	while (i >= 0 && str[i] !== ' ') i--;
+	return len - 1 - i;
+};