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Diffstat (limited to 'packages/taler-util/src/fnutils.ts')
-rw-r--r-- | packages/taler-util/src/fnutils.ts | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/packages/taler-util/src/fnutils.ts b/packages/taler-util/src/fnutils.ts new file mode 100644 index 000000000..85fac6680 --- /dev/null +++ b/packages/taler-util/src/fnutils.ts @@ -0,0 +1,38 @@ +/* + This file is part of GNU Taler + (C) 2021 Taler Systems S.A. + + GNU Taler is free software; you can redistribute it and/or modify it under the + terms of the GNU General Public License as published by the Free Software + Foundation; either version 3, or (at your option) any later version. + + GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY + WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR + A PARTICULAR PURPOSE. See the GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along with + GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/> + */ + +/** + * Functional programming utilities. + */ +export namespace fnutil { + export function all<T>(arr: T[], f: (x: T) => boolean): boolean { + for (const x of arr) { + if (!f(x)) { + return false; + } + } + return true; + } + + export function any<T>(arr: T[], f: (x: T) => boolean): boolean { + for (const x of arr) { + if (f(x)) { + return true; + } + } + return false; + } +}
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