Exports runlength

Author: mgechev

src/combinatorics/cartesianproduct.js

@@ -19,5 +19,3 @@ var cartesianProduct = (function () {
   };
 }());
 
-// console.log([[1, 2],[3, 4],[5, 6],[7, 8]]);
-// console.log(cartesianProduct([[1, 2],[3, 4],[5, 6],[7, 8]]));

src/compression/runlength/runlength.js

@@ -4,64 +4,70 @@
  * give us representation of string in binary which in which the
  * zeros will be stripped and replaced with their count.
  */
-var runLengthEncoding = (function () {
-
+(function (exports) {
   'use strict';
 
-  /**
-   * Convers a given string to sequence of numbers
-   * This takes O(n).
-   */
-  function convertToAscii(str) {
-    var result = '',
-        currentChar = '',
-        i = 0;
-    for (; i < str.length; i += 1) {
-      currentChar = str[i].charCodeAt(0).toString(2);
-      if (currentChar.length < 8) {
-        while (8 - currentChar.length) {
-          currentChar = '0' + currentChar;
+  var runLengthEncoding = (function () {
+
+    /**
+     * Convers a given string to sequence of numbers
+     * This takes O(n).
+     */
+    function convertToAscii(str) {
+      var result = '',
+          currentChar = '',
+          i = 0;
+      for (; i < str.length; i += 1) {
+        currentChar = str[i].charCodeAt(0).toString(2);
+        if (currentChar.length < 8) {
+          while (8 - currentChar.length) {
+            currentChar = '0' + currentChar;
+          }
         }
+        result += currentChar;
       }
-      result += currentChar;
+      return result;
     }
-    return result;
-  }
 
-  /**
-   * Encodes the binary string to run-length encoding.
-   * Takes O(n^2).
-   */
-  function runLength(vector) {
-    var result = '',
-        zeros = 0,
-        zerosTemp = '',
-        wordLength = 0,
-        i = 0;
-    for (; i < vector.length; i += 1) {
-      if (vector[i] === '0') {
-        zeros += 1;
-      } else {
-        zerosTemp = zeros.toString(2);
-        wordLength = zerosTemp.length - 1;
-        while (wordLength) {
-          result = result + '1';
-          wordLength -= 1;
+    /**
+     * Encodes the binary string to run-length encoding.
+     * Takes O(n^2).
+     */
+    function runLength(vector) {
+      var result = '',
+          zeros = 0,
+          zerosTemp = '',
+          wordLength = 0,
+          i = 0;
+      for (; i < vector.length; i += 1) {
+        if (vector[i] === '0') {
+          zeros += 1;
+        } else {
+          zerosTemp = zeros.toString(2);
+          wordLength = zerosTemp.length - 1;
+          while (wordLength) {
+            result = result + '1';
+            wordLength -= 1;
+          }
+          result += '0' + zerosTemp;
+          zeros = 0;
         }
-        result += '0' + zerosTemp;
-        zeros = 0;
       }
+      return result;
     }
-    return result;
-  }
 
-  /**
-   * Accepts a string and returns it's run-length encoded binary representation.
-   * Takes O(n^2).
-   */
-  return function (str) {
-    var asciiString = convertToAscii(str);
-    return runLength(asciiString);
-  };
+    /**
+     * Accepts a string and returns it's run-length
+     * encoded binary representation.
+     * Takes O(n^2).
+     */
+    return function (str) {
+      var asciiString = convertToAscii(str);
+      return runLength(asciiString);
+    };
+
+  }());
+
+  exports.runLength = runLengthEncoding;
 
-}());
+}(typeof exports === 'undefined' ? window : exports));