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Maven plugin for generating graphql clients

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/**
 * Copyright (c) 2015-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @flow strict
 */

const MAX_LENGTH = 5;

/**
 * Given [ A, B, C ] return 'A, B, or C'.
 */
export default function orList(items: $ReadOnlyArray): string {
  const selected = items.slice(0, MAX_LENGTH);
  return selected.reduce(
    (list, quoted, index) =>
      list +
      (selected.length > 2 ? ', ' : ' ') +
      (index === selected.length - 1 ? 'or ' : '') +
      quoted,
  );
}