added solution for swap II

Kyle Maune · Kyle Maune · commit 607fac7c850e · 2014-07-14T16:09:59.000-07:00
diff --git a/Medium Difficulty/swapII.js b/Medium Difficulty/swapII.js
@@ -0,0 +1,74 @@
+// coderbyte solution for swap II
+// splashinn
+
+function IsLetter(char) {
+  return "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ".indexOf(char) !== -1;
+}
+
+function IsDigit(char) {
+	return "0123456789".indexOf(char) !== -1;
+}
+
+function splitToArray(str) {
+	if (str.length === 0) {
+		return [];
+	}
+	var result = new Array();
+	var inDigits = IsDigit(str[0]);
+	var begin = 0;
+	for (var i = 1; i < str.length; i++) {
+		var digit = IsDigit(str[i]);
+		if (digit !== inDigits) {
+			result.push(str.slice(begin, i));
+			begin = i;
+			inDigits = digit;
+		}
+	}
+	result.push(str.slice(begin, str.length));
+	return result;
+}
+
+function isNumber(str) {
+	for (var i = 0; i < str.length; i++) {
+		if (IsDigit(str[i]) !== true) {
+			return false;
+		}
+	}
+	return true;
+}
+
+function isWord(str) {
+	for (var i = 0; i < str.length; i++) {
+		if (IsLetter(str[i]) !== true) {
+			return false;
+		}
+	}
+	return true;
+}
+
+
+function SwapII(str) {
+	var result = new Array(str.length);
+	for (var i = 0; i < str.length; i++) {
+		if ("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ".indexOf(str[i]) !== -1) {
+			if (str[i].toUpperCase() !== str[i]) {
+				result[i] = str[i].toUpperCase();
+			} else {
+				result[i] = str[i].toLowerCase();
+			}
+		} else {
+			result[i] = str[i];
+		}
+	}
+
+	var splitted = splitToArray(result.join(""));
+	for (var i = 1; i + 1 < splitted.length; i++) {
+		if (isWord(splitted[i]) && isNumber(splitted[i - 1]) && isNumber(splitted[i + 1])) {
+			var temp = splitted[i - 1];
+			splitted[i - 1] = splitted[i + 1];
+			splitted[i + 1] = temp;
+		}
+	}
+
+	return splitted.join("");
+}
