Remove unused functions from core/lib/utilities.js

Author: raphaelokon

core/lib/utilities.js

@@ -49,97 +49,6 @@ const warning = log.warning.bind(log);
  */
 const error = log.error.bind(log);
 
-  /**
-   * Shuffles an array in place.
-   * http://stackoverflow.com/questions/6274339/how-can-i-shuffle-an-array-in-javascript
-   *
-   * @param {Array} o
-   * @returns {Array} o
-   */
-const shuffle = function (o) {
-  /*eslint-disable curly*/
-  for (var j, x, i = o.length; i; j = Math.floor(Math.random() * i), x = o[--i], o[i] = o[j], o[j] = x);
-  return o;
-};
-
-/**
- * Recursively merge properties of two objects.
- *
- * @param {Object} obj1 If obj1 has properties obj2 doesn't, add to obj2.
- * @param {Object} obj2 This object's properties have priority over obj1.
- * @returns {Object} obj2
- */
-const mergeData = function (obj1, obj2) {
-  /*eslint-disable no-param-reassign, guard-for-in*/
-  if (typeof obj2 === 'undefined') {
-    obj2 = {};
-  }
-  for (var p in obj1) {
-    try {
-      // Only recurse if obj1[p] is an object.
-      if (obj1[p].constructor === Object) {
-        // Requires 2 objects as params; create obj2[p] if undefined.
-        if (typeof obj2[p] === 'undefined') {
-          obj2[p] = {};
-        }
-        obj2[p] = mergeData(obj1[p], obj2[p]);
-
-        // Pop when recursion meets a non-object. If obj1[p] is a non-object,
-        // only copy to undefined obj2[p]. This way, obj2 maintains priority.
-      } else if (typeof obj2[p] === 'undefined') {
-        obj2[p] = obj1[p];
-      }
-    } catch (e) {
-      // Property in destination object not set; create it and set its value.
-      if (typeof obj2[p] === 'undefined') {
-        obj2[p] = obj1[p];
-      }
-    }
-  }
-  return obj2;
-};
-
-/**
- * Determines whether or not an object is empty.
- *
- * @param {Object} obj
- * @returns {Boolean}
- */
-const isObjectEmpty = function (obj) {
-  for (var prop in obj) {
-    if (obj.hasOwnProperty(prop)) { return false; }
-  }
-  return true;
-};
-
-/**
- * Recursively delete the contents of directory.
- * Adapted from https://gist.github.com/tkihira/2367067
- *
- * @param {string} dir - directory to empty
- * @param {string} cleanDir - already empty directory
- * @returns {undefined}
- */
-const emptyDirectory = function (dir, cleanDir) {
-  var list = fs.readdirSync(dir);
-  for (var i = 0; i < list.length; i++) {
-    var filename = path.join(dir, list[i]);
-    var stat = fs.statSync(filename);
-
-    if (filename === "." || filename === "..") {
-      // pass these files
-    } else if (stat.isDirectory()) {
-      this.emptyDirectory(filename);
-    } else {
-      // rm fiilename
-      fs.unlinkSync(filename);
-    }
-  }
-  if (cleanDir) {
-    fs.rmdirSync(dir);
-  }
-};
-
 /**
  * Useful for reporting errors in .catch() on Promises
  * @param {string} - a message to report
@@ -158,9 +67,5 @@ module.exports = {
   warning,
   error,
   log,
-  shuffle,
-  mergeData,
-  isObjectEmpty,
-  emptyDirectory,
   reportError
 };