deps: upgrade npm to 6.1.0

PR-URL: https://github.com/nodejs/node/pull/20190
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>

1 files changed, 55 insertions, 0 deletions

diff --git a/deps/npm/node_modules/fast-deep-equal/index.js b/deps/npm/node_modules/fast-deep-equal/index.js
new file mode 100644
index 0000000000..7aaaba3f6c
--- /dev/null
+++ b/deps/npm/node_modules/fast-deep-equal/index.js
@@ -0,0 +1,55 @@
+'use strict';
+
+var isArray = Array.isArray;
+var keyList = Object.keys;
+var hasProp = Object.prototype.hasOwnProperty;
+
+module.exports = function equal(a, b) {
+  if (a === b) return true;
+
+  var arrA = isArray(a)
+    , arrB = isArray(b)
+    , i
+    , length
+    , key;
+
+  if (arrA && arrB) {
+    length = a.length;
+    if (length != b.length) return false;
+    for (i = 0; i < length; i++)
+      if (!equal(a[i], b[i])) return false;
+    return true;
+  }
+
+  if (arrA != arrB) return false;
+
+  var dateA = a instanceof Date
+    , dateB = b instanceof Date;
+  if (dateA != dateB) return false;
+  if (dateA && dateB) return a.getTime() == b.getTime();
+
+  var regexpA = a instanceof RegExp
+    , regexpB = b instanceof RegExp;
+  if (regexpA != regexpB) return false;
+  if (regexpA && regexpB) return a.toString() == b.toString();
+
+  if (a instanceof Object && b instanceof Object) {
+    var keys = keyList(a);
+    length = keys.length;
+
+    if (length !== keyList(b).length)
+      return false;
+
+    for (i = 0; i < length; i++)
+      if (!hasProp.call(b, keys[i])) return false;
+
+    for (i = 0; i < length; i++) {
+      key = keys[i];
+      if (!equal(a[key], b[key])) return false;
+    }
+
+    return true;
+  }
+
+  return false;
+};