add hw2

node_modules/lodash-es/toArray.js

@@ -0,0 +1,58 @@
+import Symbol from './_Symbol.js';
+import copyArray from './_copyArray.js';
+import getTag from './_getTag.js';
+import isArrayLike from './isArrayLike.js';
+import isString from './isString.js';
+import iteratorToArray from './_iteratorToArray.js';
+import mapToArray from './_mapToArray.js';
+import setToArray from './_setToArray.js';
+import stringToArray from './_stringToArray.js';
+import values from './values.js';
+
+/** `Object#toString` result references. */
+var mapTag = '[object Map]',
+    setTag = '[object Set]';
+
+/** Built-in value references. */
+var symIterator = Symbol ? Symbol.iterator : undefined;
+
+/**
+ * Converts `value` to an array.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to convert.
+ * @returns {Array} Returns the converted array.
+ * @example
+ *
+ * _.toArray({ 'a': 1, 'b': 2 });
+ * // => [1, 2]
+ *
+ * _.toArray('abc');
+ * // => ['a', 'b', 'c']
+ *
+ * _.toArray(1);
+ * // => []
+ *
+ * _.toArray(null);
+ * // => []
+ */
+function toArray(value) {
+  if (!value) {
+    return [];
+  }
+  if (isArrayLike(value)) {
+    return isString(value) ? stringToArray(value) : copyArray(value);
+  }
+  if (symIterator && value[symIterator]) {
+    return iteratorToArray(value[symIterator]());
+  }
+  var tag = getTag(value),
+      func = tag == mapTag ? mapToArray : (tag == setTag ? setToArray : values);
+
+  return func(value);
+}
+
+export default toArray;