Convert source files to use ES6 classes

src/array/array.js

@@ -1,62 +1,62 @@
 'use strict';
 
-var array = {};
-
-/**
- * Returns the first value in the given array that isn't undefined.
- * @param {!Array} arr
- * @return {*}
- */
-array.firstDefinedValue = function(arr) {
-  for (var i = 0; i < arr.length; i++) {
-    if (arr[i] !== undefined) {
-      return arr[i];
+class array {
+  /**
+   * Returns the first value in the given array that isn't undefined.
+   * @param {!Array} arr
+   * @return {*}
+   */
+  static firstDefinedValue(arr) {
+    for (var i = 0; i < arr.length; i++) {
+      if (arr[i] !== undefined) {
+        return arr[i];
+      }
     }
   }
-};
 
-/**
- * Transforms the input nested array to become flat.
- * @param {Array.<*|Array.<*>>} arr Nested array to flatten.
- * @param {Array.<*>} opt_output Optional output array.
- * @return {Array.<*>} Flat array.
- */
-array.flatten = function(arr, opt_output) {
-  var output = opt_output || [];
-  for (var i = 0; i < arr.length; i++) {
-    if (Array.isArray(arr[i])) {
-      array.flatten(arr[i], output);
-    } else {
-      output.push(arr[i]);
+  /**
+   * Transforms the input nested array to become flat.
+   * @param {Array.<*|Array.<*>>} arr Nested array to flatten.
+   * @param {Array.<*>} opt_output Optional output array.
+   * @return {Array.<*>} Flat array.
+   */
+  static flatten(arr, opt_output) {
+    var output = opt_output || [];
+    for (var i = 0; i < arr.length; i++) {
+      if (Array.isArray(arr[i])) {
+        array.flatten(arr[i], output);
+      } else {
+        output.push(arr[i]);
+      }
     }
+    return output;
   }
-  return output;
-};
 
-/**
- * Removes the first occurrence of a particular value from an array.
- * @param {Array.<T>} arr Array from which to remove value.
- * @param {T} obj Object to remove.
- * @return {boolean} True if an element was removed.
- * @template T
- */
-array.remove = function(arr, obj) {
-  var i = arr.indexOf(obj);
-  var rv;
-  if ( (rv = i >= 0) ) {
-    array.removeAt(arr, i);
+  /**
+   * Removes the first occurrence of a particular value from an array.
+   * @param {Array.<T>} arr Array from which to remove value.
+   * @param {T} obj Object to remove.
+   * @return {boolean} True if an element was removed.
+   * @template T
+   */
+   static remove(arr, obj) {
+    var i = arr.indexOf(obj);
+    var rv;
+    if ( (rv = i >= 0) ) {
+      array.removeAt(arr, i);
+    }
+    return rv;
   }
-  return rv;
-};
 
-/**
- * Removes from an array the element at index i
- * @param {Array} arr Array or array like object from which to remove value.
- * @param {number} i The index to remove.
- * @return {boolean} True if an element was removed.
- */
-array.removeAt = function(arr, i) {
-  return Array.prototype.splice.call(arr, i, 1).length === 1;
-};
+  /**
+   * Removes from an array the element at index i
+   * @param {Array} arr Array or array like object from which to remove value.
+   * @param {number} i The index to remove.
+   * @return {boolean} True if an element was removed.
+   */
+  static removeAt(arr, i) {
+    return Array.prototype.splice.call(arr, i, 1).length === 1;
+  }
+}
 
 export default array;