From de98e0b232509d5f40c135d540a70e415272ff85 Mon Sep 17 00:00:00 2001 From: Florian Dold Date: Wed, 3 May 2017 15:35:00 +0200 Subject: node_modules --- node_modules/fbjs/lib/emptyFunction.js | 38 ++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 node_modules/fbjs/lib/emptyFunction.js (limited to 'node_modules/fbjs/lib/emptyFunction.js') diff --git a/node_modules/fbjs/lib/emptyFunction.js b/node_modules/fbjs/lib/emptyFunction.js new file mode 100644 index 000000000..9f06dc060 --- /dev/null +++ b/node_modules/fbjs/lib/emptyFunction.js @@ -0,0 +1,38 @@ +"use strict"; + +/** + * Copyright (c) 2013-present, Facebook, Inc. + * All rights reserved. + * + * This source code is licensed under the BSD-style license found in the + * LICENSE file in the root directory of this source tree. An additional grant + * of patent rights can be found in the PATENTS file in the same directory. + * + * + */ + +function makeEmptyFunction(arg) { + return function () { + return arg; + }; +} + +/** + * This function accepts and discards inputs; it has no side effects. This is + * primarily useful idiomatically for overridable function endpoints which + * always need to be callable, since JS lacks a null-call idiom ala Cocoa. + */ +var emptyFunction = function emptyFunction() {}; + +emptyFunction.thatReturns = makeEmptyFunction; +emptyFunction.thatReturnsFalse = makeEmptyFunction(false); +emptyFunction.thatReturnsTrue = makeEmptyFunction(true); +emptyFunction.thatReturnsNull = makeEmptyFunction(null); +emptyFunction.thatReturnsThis = function () { + return this; +}; +emptyFunction.thatReturnsArgument = function (arg) { + return arg; +}; + +module.exports = emptyFunction; \ No newline at end of file -- cgit v1.2.3