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Hsin-lin Cheng lancetw

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lancetw / alphabet-board-path.clean.js

Last active April 25, 2020 02:32

	const alphabetBoardPath = (target) => {
	const layout = 5
	const hashMap = new Map(Array.from("abcdefghijklmnopqrstuvwxyz").map((c, i) => [ c, {x: (i / layout) \| 0, y: i % layout \| 0}]))
	const repeat = (s, n) => (n <= 0 ? '' : s.repeat(n))
	let p0 = { x: 0, y: 0 }
	return Array.from(target).reduce((ret, t) => {
	const p = hashMap.get(t)
	ret.push(p.y < p0.y ? repeat('L', p0.y - p.y) : '', p.x < p0.x ? repeat('U', p0.x - p.x) : '', p.x > p0.x ? repeat('D', p.x - p0.x) : '', p.y > p0.y ? repeat('R', p.y - p0.y) : '', '!')
	p0 = p
	return ret

lancetw / alphabet-board-path.js

Last active April 25, 2020 02:33

	const alphabetBoardPath = (target) => {
	const layout = 5
	const hashMap = new Map(Array.from("abcdefghijklmnopqrstuvwxyz")
	.map((c, i) => [ c, {x: (i / layout) \| 0, y: i % layout \| 0}]))
	const repeat = (s, n) => (n <= 0 ? '' : s.repeat(n))

	let p0 = { x: 0, y: 0 }

	const ret = Array.from(target).reduce((ret, t) => {
	const p = hashMap.get(t)

lancetw / loop.js

Created November 3, 2018 05:57

	const delay = (delay) => () => new Promise((resolve, reject) => setTimeout(resolve, delay))
	const main = () => f1().then(f2).catch(f3)

	const f1 = () => new Promise((resolve, reject) => ret ? resolve() : reject())
	const f2 = () => Promise.resolve('f2')
	const f3 = () => Promise.resolve('f3')

	let ret = true
	const next = () => ret = !ret

lancetw / tsconfig.json

Created October 9, 2018 09:30

	{
	"compilerOptions": {
	"allowSyntheticDefaultImports": true,
	"declaration": false,
	"emitDecoratorMetadata": true,
	"experimentalDecorators": true,
	"lib": ["dom", "es2015"],
	"module": "es2015",
	"moduleResolution": "node",
	"sourceMap": true,

lancetw / form2obj.ts

Last active September 26, 2018 11:57

	let user = new User(filterByProps(form, [
	'username',
	'displayname'
	]))

	function filterByProps(obj: any, props: string[]): any {
	if (!props) return obj
	let ret = {}
	Object.keys(obj).forEach(key => {
	if (props.some(prop => prop === key)) {

lancetw / filterByProps.js

Created March 1, 2018 18:05

filterByProps

	export function filterByProps(obj: any, props: string[]): any {
	if (!props) return obj
	let ret = {}
	Object.keys(obj).forEach(key => {
	if (props.some(prop => prop === key)) {
	ret[key] = clone(obj[key])
	}
	})
	return ret
	}

lancetw / pprint_helper.py

Created January 16, 2018 11:21

	#!/usr/bin/env python
	# -- coding: utf-8 --

	from pygments import highlight
	from pygments.lexers import JsonLexer
	from pygments.formatters import TerminalFormatter
	from pprint import pformat
	import json

	def pprint_color(obj, indent=2):

lancetw / redux-form-submit.js

Created June 8, 2017 06:02

	export const submit = (values, dispatch /, props /) => {
	setSubmitting('loginForm', true)
	return login(values)
	.then(action => {
	dispatch(action)
	setSubmitting('loginForm', false)
	})
	.catch(error => {
	dispatch(error)
	throw new SubmissionError(error.payload)

lancetw / promise-sequence-slow.js

Last active June 7, 2017 14:32 — forked from caasi/promise-sequence.js

	let actions = []

	for (let i = 0; i < 10000; i++) {
	actions.push(() => Promise.resolve(i))
	}


	const process = (task) => task.reduce((promised, task) => promised.then(acc => task().then(value => [...acc, value])), Promise.resolve([]))

	process(actions)

lancetw / promise-sequence.js

Last active June 7, 2017 13:58 — forked from caasi/promise-queue.js