25 lines
643 B
Plaintext
25 lines
643 B
Plaintext
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/**
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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 maxBy
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* @flow
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*/
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var minBy = require('./minBy');
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var compareNumber = (a, b) => a - b;
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/**
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* Returns the maximum element as measured by a scoring function f. Returns the
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* first such element if there are ties.
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*/
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function maxBy<A, B>(as: Iterable<A>, f: (a: A) => B, compare?: ?(u: B, v: B) => number): ?A {
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compare = compare || (compareNumber: any);
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return minBy(as, f, (u, v) => (compare: any)(v, u));
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}
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module.exports = maxBy;
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