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Michell Ayala mishelashala

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  • Mérida, Yucatan
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@mishelashala
mishelashala / 19-promise.ts
Created July 27, 2020 14:51
// resolve :: a -> Promise a
// reject :: a -> Promise a
// of :: a -> AsyncMonad a
// then :: (a -> b) -> Promise b
// map :: (a -> b) -> AsyncMonad b
// then :: (a -> Promise b) -> Promise b
// flatMap :: (a -> AsyncMonad b) -> AsyncMonad b
@mishelashala
mishelashala / 18-promise.ts
Created July 27, 2020 14:45
// resolve :: a -> Promise<a>
// reject :: a -> Promise<a>
@mishelashala
mishelashala / 17-promise.ts
Created July 27, 2020 14:44
// of :: (a) -> AsyncMonad a
@mishelashala
mishelashala / 16-promise.ts
Created July 27, 2020 14:42
// flatMap :: (a -> AsyncMonad b) -> AsyncMonad b
@mishelashala
mishelashala / 15-promise.ts
Last active July 27, 2020 14:41
// map :: (a -> b) -> AsyncMonad b
@mishelashala
mishelashala / 14-promise.ts
Created July 27, 2020 14:40
// then :: (a -> b) -> Promise b
// then :: (a -> Promise b) -> Promise b
@mishelashala
mishelashala / 13-promise.ts
Created July 27, 2020 14:34
// fulfilled promise
const promisedNumber = Promise.resolve(12)
promisedNumber.then(value => console.log('number:', value))
// rejected promise
const rejectedString = Promise.reject(new Error('could not produce string'))
rejectedString.catch(err => console.log('error:', err.message))
@mishelashala
mishelashala / 12-promise.ts
Last active July 27, 2020 14:12
// PromisedNumber :: () -> Promise<error>
const PromisedNumber = () => new Promise(function (fulfill, reject) {
setTimeout(() => { reject(new Error('could not produce number')) }, 500)
})
// PromisedString :: () -> Promise<string>
const PromisedString = () => new Promise(function (fulfill, reject) {
setTimeout(() => { fulfill(10) }, 1000)
})
console.log('start')
@mishelashala
mishelashala / 11-promises.ts
Last active July 27, 2020 13:52
// PromisedNumber :: () -> Promise<Error>
const PromisedNumber = () => new Promise(function (fulfill, reject) {
setTimeout(() => { reject(new Error('could not produce number')) }, 500)
})
@mishelashala
mishelashala / 10-promises.ts
Last active July 27, 2020 13:49
// PromisedNumber :: () -> Promise<number>
const PromisedNumber = () => new Promise(function (fulfill, reject) {
setTimeout(() => { fulfill(10) }, 500)
})
// PromisedString :: () -> Promise<string>
const PromisedString = () => new Promise(function (fulfill, reject) {
setTimeout(() => { fulfill(10) }, 1000)
})
console.log('start')