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@dagda1
dagda1 / bool-hell.js
Last active April 9, 2021 16:57
let isActive
if (inactive === false || (active && !inactive)) {
isActive = true
} else if (active === false || (inactive && !active)) {
isActive = false
}
// mutually exclusive string union cures this
// type State = 'ACTIVE' | 'INACTIVE';
@dagda1
dagda1 / simulation.graphql
Created February 11, 2021 12:18
type Service {
name: String!
ur!: String!
}
union Any = String | Float | Int | Boolean
type KeyValue {
key: String!
value: Any
@dagda1
dagda1 / .eslint.json
Created January 4, 2021 09:54
{
"extends": "@cutting/eslint-config/react",
"rules": {
"react-hooks/rules-of-hooks": ["error", {
"additionalHooks": "(useIsomorphicLayoutEffect)"
}],
"react-hooks/exhaustive-deps": ["error", {
"additionalHooks": "(useIsomorphicLayoutEffect)"
}]
@dagda1
dagda1 / a.ts
Created November 28, 2020 22:16
const setCount = (n: number) => {
return {
type: 'SET_COUNT',
payload: n
} as const;
}
const resetCount = () => {
return {
type: 'RESET_COUNT'
@dagda1
dagda1 / a.ts
Created November 28, 2020 22:14
const
const setCount = (n: number) => {
return <const>{
type: 'SET_COUNT',
payload: n
}
}
const resetCount = () => {
return <const>{
type: 'RESET_COUNT'
@dagda1
dagda1 / i.ts
Created September 5, 2020 22:11
export type BundlerState =
| { type: 'UNBUNDLED' }
| { type: 'BUILDING'; warnings: BundlerWarning[] }
| { type: 'GREEN'; path: string; warnings: BundlerWarning[] }
| { type: 'ERRORED'; error: BundlerError }
export type BundlerTypes = Pick<BundlerState, 'type'>['type'];
@dagda1
dagda1 / asyncFlatMap.ts
Created July 4, 2020 08:50
type CallBackFN<T, R> = (value: T, index: number, array: T[]) => Promise<R>;
export const flatten = <T>(arr: T[][]): T[] => {
return arr.reduce((acc, value) => acc.concat(value), [] as T[]);
};
export const asyncMap = <T, R>(arr: T[], asyncFn: CallBackFN<T, R>): Promise<R[]> => {
return Promise.all(arr.map(asyncFn));
};
@dagda1
dagda1 / typesafenulls.ts
Created June 28, 2020 15:19
feature.children = e
.flatMap(el => (notNothing(el.pickle) ? [el.pickle] : []))
.flatMap(pickle => {
let scenario = testBuilder(`scenario: ${pickle.name}`);
@dagda1
dagda1 / config.ts
Created June 13, 2020 06:23
import { CompilerOptions } from 'typescript';
export type DeepPartial<T> = T extends object ? { [K in keyof T]?: DeepPartial<T[K]> } : T;
export interface FullBuildConfig {
client: {
entries: string;
hotReloading: boolean;
publicPath: string;
};
@dagda1
dagda1 / umount.js
Created June 11, 2020 11:30
useEffect(() => {
let didCancel = false;
// ...
// you can check didCancel
// before running any setState
// ...
return () => {
didCancel = true;