29 lines
698 B
JavaScript
29 lines
698 B
JavaScript
/**
|
|
* 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.
|
|
*
|
|
*
|
|
* @typechecks static-only
|
|
*/
|
|
|
|
'use strict';
|
|
|
|
/**
|
|
* Memoizes the return value of a function that accepts one string argument.
|
|
*/
|
|
|
|
function memoizeStringOnly(callback) {
|
|
var cache = {};
|
|
return function (string) {
|
|
if (!cache.hasOwnProperty(string)) {
|
|
cache[string] = callback.call(this, string);
|
|
}
|
|
return cache[string];
|
|
};
|
|
}
|
|
|
|
module.exports = memoizeStringOnly; |