react app

react-app/node_modules/lodash/object/has.js

@@ -0,0 +1,57 @@
+var baseGet = require('../internal/baseGet'),
+    baseSlice = require('../internal/baseSlice'),
+    isArguments = require('../lang/isArguments'),
+    isArray = require('../lang/isArray'),
+    isIndex = require('../internal/isIndex'),
+    isKey = require('../internal/isKey'),
+    isLength = require('../internal/isLength'),
+    last = require('../array/last'),
+    toPath = require('../internal/toPath');
+
+/** Used for native method references. */
+var objectProto = Object.prototype;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Checks if `path` is a direct property.
+ *
+ * @static
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` is a direct property, else `false`.
+ * @example
+ *
+ * var object = { 'a': { 'b': { 'c': 3 } } };
+ *
+ * _.has(object, 'a');
+ * // => true
+ *
+ * _.has(object, 'a.b.c');
+ * // => true
+ *
+ * _.has(object, ['a', 'b', 'c']);
+ * // => true
+ */
+function has(object, path) {
+  if (object == null) {
+    return false;
+  }
+  var result = hasOwnProperty.call(object, path);
+  if (!result && !isKey(path)) {
+    path = toPath(path);
+    object = path.length == 1 ? object : baseGet(object, baseSlice(path, 0, -1));
+    if (object == null) {
+      return false;
+    }
+    path = last(path);
+    result = hasOwnProperty.call(object, path);
+  }
+  return result || (isLength(object.length) && isIndex(path, object.length) &&
+    (isArray(object) || isArguments(object)));
+}
+
+module.exports = has;