Ullrich Schäfer stigi

SwiftData storage on the Mac

Where does SwiftData store things on the Mac?

Default Storage Location

On iOS, this directory is in the app's own storage location (app_UUID/Library/Application Support) but, on the Mac, it's a shared location in the user's Library.

By default on the Mac, SwiftData stores its model in the /~/Library/Application Support directory as default.store. (It will also add two other files, default.store-shm and default.store-wal, as the model is stored as a SQLite database, and these are these additional files are part of how SQLite works.)

This gist lists challenges you run into when building offline-first applications based on IndexedDB, including open-source libraries like Firebase, pouchdb and AWS amplify (more).

Note that some of the following issues affect only Safari. Out of the major browsers, Chrome's IndexedDB implementation is the best.

Backing file on disk (WAL file) keeps growing (Safari)

When this bug occurs, every time you use the indexeddb, the WAL file grows. Garbage collection doesn't seem to be working, so after a while, you end up with gigabytes of data.

Random exceptions when working with a large number of indexeddb databases (Safari)

This document will be a part of the upcoming re-frame website.

On Derived Data

The UI is just derived data.

At each moment, the DOM displayed is a "materialised view" of what is in app-db.

Domino 3 modifies app-db and then boom, boom, boom go dominoes 4, 5 & 6, automatically producing this "materialised view", via a data flow.

Wahoo Elemnt - Tips, tricks and custom images

High level overview https://yogthos.github.io/ClojureDistilled.html
An Animated Introduction to Clojure https://markm208.github.io/cljbook/
Interactive tutorial in a browser https://tryclojure.org/
Interactive exercises http://clojurescriptkoans.com/
Clerk notebooks with introductory examples https://github.clerk.garden/anthonygalea/notes-on-clojure
More interactive exercises https://4clojure.oxal.org/
Lambda Island tutorials https://lambdaisland.com/
Functional Programming with Clojure resources https://practicalli.github.io/

Moved to Shopify/graphql-design-tutorial

Variables by Secrets

Sample script that allows you to define as environment variables the name of the docker secret that contains the secret value. It will be in charge of analyze all the environment variables searching for the placeholder to substitute the variable value by the secret.

Usage

You can define the next environment variables:

	// @flow

	import { map, is } from 'rambdax'
	import type { DirtyRaw } from '@nozbe/watermelondb/RawRecord'
	import type { SyncLog } from '@nozbe/watermelondb/sync'

	// beginning, end, length
	const censorValue = (value: string): string =>
	`${value.slice(0, 2)}***${value.slice(-2)}(${value.length})`
	const shouldCensorKey = (key: string): boolean =>

	(ns my.promises
	"Demo to show different approaches to handling promise chains in ClojureScript

	In particular, this file investigates how to pass data between Promise
	callbacks in a chain.

	See Axel Rauschmayer's post
	http://2ality.com/2017/08/promise-callback-data-flow.html for a problem
	statement.

	# Description:
	# Helper commands for YNAB Pull Requests
	#
	# Commands:
	# hubot rebuild - Rebuilds this branch.
	# hubot ketchup\|catchup\|catch_up\|upbase\|reverse integrate\|reverse_integrate\|backmerge\|back_merge - Merges the target branch back into this pull request branch.

	TextMessage = require('hubot').TextMessage
	GitHubApi = require("github"); # https://github.com/mikedeboer/node-github