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34 lines
1.2 KiB
TypeScript
34 lines
1.2 KiB
TypeScript
/**
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* Teleport
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* Copyright (C) 2023 Gravitational, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* pipe takes an array of unary functions as an argument. It returns a function that accepts a value
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* that's going to be passed through the supplied functions.
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*
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* @example
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* // Without pipe.
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* const add1ThenDouble = (x) => double(add1(x));
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*
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* // With pipe.
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* const add1ThenDouble = pipe(add1, double);
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*/
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export const pipe =
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<PipeSubject>(...fns: Array<(pipeSubject: PipeSubject) => PipeSubject>) =>
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(x: PipeSubject) =>
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fns.reduce((v, f) => f(v), x);
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