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Add Predicate type

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Aya Morisawa 2018-12-19 17:08:09 +09:00
parent 78ec06bda3
commit 8025b121af
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2 changed files with 6 additions and 3 deletions
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src/prelude/relation.ts
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@ -1,3 +1,5 @@
export type Predicate<T> = (x: T) => boolean;
export type Relation<T, U> = (x: T, y: U) => boolean;
export type EndoRelation<T> = Relation<T, T>;