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c080537a7b
* shared/src -> shared It's not a real package and doesn't even have package.json. This will also make importing less weird if we drop Haste. * Get rid of shared/utils Moved event-specific into shared/event. Moved rest to the root since distinction has always been pretty arbitrary. * Fix references to old shared/src paths
35 lines
964 B
JavaScript
35 lines
964 B
JavaScript
/**
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* Copyright (c) 2013-present, Facebook, Inc.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @providesModule forEachAccumulated
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* @flow
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*/
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'use strict';
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/**
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* @param {array} arr an "accumulation" of items which is either an Array or
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* a single item. Useful when paired with the `accumulate` module. This is a
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* simple utility that allows us to reason about a collection of items, but
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* handling the case when there is exactly one item (and we do not need to
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* allocate an array).
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* @param {function} cb Callback invoked with each element or a collection.
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* @param {?} [scope] Scope used as `this` in a callback.
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*/
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function forEachAccumulated<T>(
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arr: ?(T | Array<T>),
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cb: (elem: T) => void,
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scope: ?any,
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) {
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if (Array.isArray(arr)) {
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arr.forEach(cb, scope);
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} else if (arr) {
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cb.call(scope, arr);
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}
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}
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module.exports = forEachAccumulated;
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