Kris theredhead

Just a dude abiding, making my way through the galaxy, like my father before me.

theredhead / makeCompareFunction.ts

Created March 29, 2021 06:19

Typescript generic "make a compare function" function that takes a lambda, expected to return the property to compare (normally).

	/* Create a function used with `sort()` to sort arrays of objects
	* for example:
	* const sortByLastName = makeCompareFunction<Person>(p => p.lastName);
	* people.sort(sortByLastName);
	*/
	export function makeCompareFunction<T>(lambda: (obj: T) => string \| number) {
	return (a: T, b: T): number => {
	const _a = lambda(a);
	const _b = lambda(b);
	if (_a < _b) {

theredhead / gravatar-url.ts

Created March 16, 2021 11:29

Gravatar url in typescript

	// npm install md5
	import * as md5 from 'md5';

	export const enum GravatarType {
	MysteryPerson,
	Identicon,
	MonsterId,
	Wavatar,
	Retro,
	Robohash,

theredhead / sluggify.ts

Created March 9, 2021 19:33

Sluggify a text (typescript)

	const sluggify = (text: string): string => {
	const allowedCharacters = 'abcdefghijklmnopqrstuvwxyz_1234567890';
	const result = [];
	const preTransformed = text.toLowerCase().replace(/\s/, '-');

	for (let char of preTransformed) {
	if (allowedCharacters.includes(char)) {
	result.push(char);
	}
	}

theredhead / mysql-backup-docker.sh

Created December 1, 2020 09:05

Backup and restore mysql databases running in docker containers (from docker host shell)

	# CONTAINER_ID => value of container id column from `docker ps`
	# DATABASE_NAME => name of the mysql database to backup/restore

	# Backup to backup-file.sql outside container
	docker exec CONTAINER_ID /usr/bin/mysqldump --triggers --routines -uMYSQL_USER -pMYSQL_PASSWORD DATABASE_NAME > backup-file.sql

	# Restore from backup-file.sql outside container
	cat backup-file.sql \| docker exec -i CONTAINER_ID /usr/bin/mysql -uMYSQL_USER -pMYSQL_PASSWORD DATABASE_NAME

theredhead / preference-in-localstorage.ts

Created June 22, 2020 08:19

Annotate a field in a typescript class to store its' content in localstorage transparently.

	//
	// Inspired by https://github.com/zhaosiyang/property-watch-decorator/blob/master/src/index.ts
	//
	// Annotate a field in a typescript class to store its' content in localstorage transparently.
	//
	export function Preference<T = any>(preferenceKey: string, defaultValueObj: T) {
	return (target: any, key: PropertyKey) => {
	Object.defineProperty(target, key, {
	set: function(value) {
	localStorage.setItem(preferenceKey, JSON.stringify(value));

theredhead / columns-nn-nn.css

Created September 25, 2019 10:33

simple dual columns in simple css

	/* You can add global styles to this file, and also import other style files */

	.columns-80-20 {
	display: grid;
	grid-template-areas: 'left right';
	grid-template-columns: 80% 20%;

	*:nth-child(0) {
	grid-area: left;
	overflow: scroll;

theredhead / url-tools.ts

Created September 24, 2019 08:02

some utility to help building urls

theredhead / text-functions.ts

Created September 18, 2019 13:33

useful text functions

	export function object_to_searchable_text(obj: any): string {
	if (obj === undefined) {
	return '';
	} else if (typeof obj === 'object') {
	const parts = [];
	for (const property of Object.keys(obj)) {
	parts.push(object_to_searchable_text(obj[property]));
	}
	return parts.join(' ');
	} else if (Array.isArray(obj)) {

theredhead / file-drop-snippet.ts

Created August 21, 2019 10:50

	dragOver = false;
	fileDropped(file: File) {
	const reader = new FileReader();
	reader.onload = (event: ProgressEvent) => {
	const json = reader.result as string;
	this.rulesets = JSON.parse(json) as Ruleset[];
	};
	//reader.onerror...
	reader.readAsText(file);
	}

theredhead / download.ts

Created August 21, 2019 10:44

	export function download(fileName: string, data: any) {
	const json = JSON.stringify(data, null, 2);

	const anchor = document.createElement('a');
	anchor.setAttribute(
	'href',
	'data:text/plain;charset=utf-8,' + encodeURIComponent(json)
	);

	anchor.setAttribute('download', fileName);