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PeterHancock/index.js

Created December 15, 2017 10:31
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requirebin sketch
Raw
index.js
// Welcome! require() some modules from npm (like you were using browserify)
// and then hit Run Code to run your code on the right side.
// Modules get downloaded from browserify-cdn and bundled in your browser.
const delay = (t) => new Promise((resolve, reject) => {
setTimeout(() => resolve(delay.DELAY), t)
})
delay.DELAY = Symbol('DELAY')
const timeout = (t) => (p) => Promise.race([p, delay(t)]).then(
(value) => {
console.log('timeout?', value === delay.DELAY)
if (value === delay.DELAY) {
throw 'Operation timed out'
}
return value
}
)
const retry = (n) => (f) => new Promise((resolve, reject) => {
const attempt = (n) => {
if (n > 0) {
f().then(resolve).catch(() => attempt(n - 1))
} else {
return reject(retry.FAILED)
}
}
attempt(n + 1)
})
retry.FAILED = Symbol('RETRY_FAILED')
const getStuff = (...$) => delay(100).then(() => [...$])
getStuff(1, 2, 3)
.then((x) => console.log('success 1', x))
.catch((x) => console.error('Failure 1', x));
(
(...$) => timeout(20)(getStuff(...$))
)(1, 2, 3)
.catch((x) => console.error('Failure', x));
(
(...$) => retry(2)(() => getStuff(...$))
)(1, 2, 3)
.then((x) => console.error('Success 2', x))
.catch((x) => console.error('Failure 2', x));
(
(...$) => retry(2)(() => timeout(20)(getStuff(...$)))
)(1, 2, 3)
.then((x) => console.error('Success 3', x))
.catch((x) => console.error('Failure 3', x));
// (...(() => P) => () => P) => (() => P) => () => P
const compose = (...promiseFns) => promiseFns.reduce((acc, promiseFn) => (f) => acc(promiseFn(f)))
const retryTwiceWithTimeout = compose(
(f) => () => retry(2)(f),
(f) => () => timeout(20)(f())
)
const getStuffSafe = (...$) => retryTwiceWithTimeout(() => getStuff(...$))()
getStuffSafe(1, 2, 3)
.then((x) => console.log('success compose', x))
.catch((x) => console.error('Failure compose', x))
Raw
minified.js
setTimeout(function(){
;// Welcome! require() some modules from npm (like you were using browserify)
// and then hit Run Code to run your code on the right side.
// Modules get downloaded from browserify-cdn and bundled in your browser.
const delay = (t) => new Promise((resolve, reject) => {
setTimeout(() => resolve(delay.DELAY), t)
})
delay.DELAY = Symbol('DELAY')
const timeout = (t) => (p) => Promise.race([p, delay(t)]).then(
(value) => {
console.log('timeout?', value === delay.DELAY)
if (value === delay.DELAY) {
throw 'Operation timed out'
}
return value
}
)
const retry = (n) => (f) => new Promise((resolve, reject) => {
const attempt = (n) => {
if (n > 0) {
f().then(resolve).catch(() => attempt(n - 1))
} else {
return reject(retry.FAILED)
}
}
attempt(n + 1)
})
retry.FAILED = Symbol('RETRY_FAILED')
const getStuff = (...$) => delay(100).then(() => [...$])
getStuff(1, 2, 3)
.then((x) => console.log('success 1', x))
.catch((x) => console.error('Failure 1', x));
(
(...$) => timeout(20)(getStuff(...$))
)(1, 2, 3)
.catch((x) => console.error('Failure', x));
(
(...$) => retry(2)(() => getStuff(...$))
)(1, 2, 3)
.then((x) => console.error('Success 2', x))
.catch((x) => console.error('Failure 2', x));
(
(...$) => retry(2)(() => timeout(20)(getStuff(...$)))
)(1, 2, 3)
.then((x) => console.error('Success 3', x))
.catch((x) => console.error('Failure 3', x));
// (...(() => P) => () => P) => (() => P) => () => P
const compose = (...promiseFns) => promiseFns.reduce((acc, promiseFn) => (f) => acc(promiseFn(f)))
const retryTwiceWithTimeout = compose(
(f) => () => retry(2)(f),
(f) => () => timeout(20)(f())
)
const getStuffSafe = (...$) => retryTwiceWithTimeout(() => getStuff(...$))()
getStuffSafe(1, 2, 3)
.then((x) => console.log('success compose', x))
.catch((x) => console.error('Failure compose', x))
;}, 0)
Raw
package.json
{
"name": "requirebin-sketch",
"version": "1.0.0"
}
Raw
page-body.html
<!-- contents of this file will be placed inside the <body> -->
Raw
page-head.html
<!-- contents of this file will be placed inside the <head> -->
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