Kenji Imamula kimamula
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| /** | |
| * return the mid value among x, y, and z | |
| * @param x | |
| * @param y | |
| * @param z | |
| * @param compare | |
| * @returns {Promise.<*>} | |
| */ | |
| async function getPivot(x, y, z, compare) { | |
| if (await compare(x, y) < 0) { |
kimamula
/ Optional.ts
Last active
December 3, 2020 20:12
Implementation of Optional (Maybe) in TypeScript
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| class Some<A> implements Optional<A> { | |
| constructor(private a: A) { | |
| } | |
| getOrElse(a: A) { | |
| return this.a; | |
| } | |
| map<B>(func: (a: A) => B) { | |
| return Optional(func(this.a)); | |
| } | |
| match<B>(cases: { |