Sha256: 24abac9bb8bc9419d11743fdbfc4f2db0463fc3fb5863bcc18b53d7619e91729
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Size: 1.3 KB
Versions: 5
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Stored size: 1.3 KB
Contents
/**
* Copyright 2013-2015, 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.
*
* @providesModule accumulate
*/
'use strict';
var invariant = require('fbjs/lib/invariant');
/**
* Accumulates items that must not be null or undefined.
*
* This is used to conserve memory by avoiding array allocations.
*
* @return {*|array<*>} An accumulation of items.
*/
function accumulate(current, next) {
!(next != null) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'accumulate(...): Accumulated items must be not be null or undefined.') : invariant(false) : undefined;
if (current == null) {
return next;
} else {
// Both are not empty. Warning: Never call x.concat(y) when you are not
// certain that x is an Array (x could be a string with concat method).
var currentIsArray = Array.isArray(current);
var nextIsArray = Array.isArray(next);
if (currentIsArray) {
return current.concat(next);
} else {
if (nextIsArray) {
return [current].concat(next);
} else {
return [current, next];
}
}
}
}
module.exports = accumulate;
Version data entries
5 entries across 3 versions & 1 rubygems