Jon Wire svidgen

From the library source:

Fork the amplify-js repo in GitHub and clone it locally
Run yarn setup-dev
Run yarn build:watch

From your sample app:

Run yarn link aws-amplify @aws-amplify/core @aws-amplify/datastore @aws-amplify/auth @aws-amplify/ui-components @aws-amplify/ui-react @aws-amplify/api @aws-amplify/api-graphql

You may not need all of these, but might as well link them just in case

example of configuration of webpack with express and routes for REST-API
example project can be found here

Create Root CA (Done once)

Create Root Key

Attention: this is the key used to sign the certificate requests, anyone holding this can sign certificates on your behalf. So keep it in a safe place!

openssl genrsa -des3 -out rootCA.key 4096

SSH agent forwarding and screen

When connecting to a remote server via SSH it is often convenient to use SSH agent forwarding so that you don't need a separate keypair on that server for connecting to further servers.

This is enabled by adding the

ForwardAgent yes

option to any of your Host entries in ~/.ssh/config (or alternatively with the -A option). Don't set this option in a wildcard Host * section since any user on the remote server that can bypass file permissions can now als use keys loaded in your SSH agent. So only use this with hosts you trust.


	// when T is any\|unknown, Y is returned, otherwise N
	type IsAnyUnknown<T, Y, N> = unknown extends T ? Y : N;

	// when T is never, Y is returned, otherwise N
	type IsNever<T, Y = true, N = false> = [T] extends [never] ? Y : N;

	// when T is a tuple, Y is returned, otherwise N
	// valid tuples = [string], [string, boolean],
	// invalid tuples = [], string[], (string \| number)[]

	Latency Comparison Numbers (~2012)
	----------------------------------
	L1 cache reference 0.5 ns
	Branch mispredict 5 ns
	L2 cache reference 7 ns 14x L1 cache
	Mutex lock/unlock 25 ns
	Main memory reference 100 ns 20x L2 cache, 200x L1 cache
	Compress 1K bytes with Zippy 3,000 ns 3 us
	Send 1K bytes over 1 Gbps network 10,000 ns 10 us
	Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD

	ಠ_ಠ
	( ͡° ͜ʖ ͡°)
	¯\_(ツ)_/¯
	(╯°□°)╯︵ ┻━┻

	http://www.fileformat.info/convert/text/upside-down.htm

	WRTTN http://wrttn.me/30dbfd/
	Unicode Emoticons

	if "[email protected]" =~ /@(.*)/
	$1
	else
	raise "bad email"
	end
	# => "example.com"

	git fetch upstream
	git reset --hard upstream/master