Gabin Marignier gabsn

Starknet Cheatsheet

Create devnet account

export STARKNET_WALLET=starkware.starknet.wallets.open_zeppelin.OpenZeppelinAccount
starknet --gateway_url http://127.0.0.1:5050 new_account --account toto
starknet --gateway_url http://127.0.0.1:5050 deploy_account --account toto

Debug failing transaction

List

Java

ArrayList vs LinkedList vs Vector

We should always use ArrayList when we need a List, except for a few use cases where LinkedList is more adapted (when implementing a queue for example). We should also avoid using Vector which is a legacy class. If we need synchronisation, we will use the Collections.synchronizedList wrapper.

Method	ArrayList	LinkdedList
`get(int i)`	O(1)	O(n/4)
`add(E e)`	O(1), O(n) worst-case	O(1)

Go

Concurrency

Your problem with Vim is that you don't grok vi.

You mention cutting with yy and complain that you almost never want to cut whole lines. In fact programmers, editing source code, very often want to work on whole lines, ranges of lines and blocks of code. However, yy is only one of many way to yank text into the anonymous copy buffer (or "register" as it's called in vi).

The "Zen" of vi is that you're speaking a language. The initial y is a verb. The statement yy is a synonym for y_. The y is doubled up to make it easier to type, since it is such a common operation.

This can also be expressed as dd P (delete the current line and paste a copy back into place; leaving a copy in the anonymous register as a side effect). The y and d "verbs" take any movement as their "subject." Thus yW is "yank from here (the cursor) to the end of the current/next (big) word" and y'a is "yank from here to the line containing the mark named 'a'."

If you only understand basic up, dow

Internship Report

App Configuration

We can use different ways to configure an app: local/global variables, flags, environment variables, config files.
Solutions like viper exist for go apps to combine those solutions all together.
Should we use environment variables for app configuration?
In my opinion, all the OS-dependent configuration options should be passed explicitly at the start of the application. Flags are the perfect way for that, because on the contrary of env variables, it's os-independent and explicit.

Here are all the reasons why we shouldn't use environment variables:

Dynamically set: they can be set by other users, so we are not really sure of their value across the time.

==================
WARNING: DATA RACE
Read at 0x00c42470c7c8 by goroutine 9:
  reflect.Value.Int()
      /home/vagrant/.gimme/versions/go1.8.linux.amd64/src/reflect/value.go:900 +0x181
  github.com/DataDog/dd-trace-go/vendor/github.com/ugorji/go/codec.(*encFnInfo).kInt()
      /home/vagrant/go/src/github.com/DataDog/dd-trace-go/vendor/github.com/ugorji/go/codec/encode.go:416 +0x50
  github.com/DataDog/dd-trace-go/vendor/github.com/ugorji/go/codec.(*Encoder).doEncodeValue()
      /home/vagrant/go/src/github.com/DataDog/dd-trace-go/vendor/github.com/ugorji/go/codec/encode.go:1222 +0xa1

	# module.app_dbs.google_sql_database.app will be created
	le-beta_v3.7.0_x5: 2020/02/12 14:36:34 [INFO] Instantiating Google Cloud Spanner client for path https://spanner.googleapis.com/
	+ resource "google_sql_database" "app" {
	2020-02-12T14:36:34.149+0100 [DEBUG] plugin.terraform-provider-google-beta_v3.7.0_x5: 2020/02/12 14:36:34 [INFO] Instantiating Google Cloud Dataproc client for path https://dataproc.googleapis.com/
	2020-02-12T14:36:34.149+0100 [DEBUG] plugin.terraform-provider-google-beta_v3.7.0_x5: 2020/02/12 14:36:34 [INFO] Instantiating Google Cloud Dataproc Beta client for path https://dataproc.googleapis.com/
	2020-02-12T14:36:34.149+0100 [DEBUG] plugin.terraform-provider-google-beta_v3.7.0_x5: 2020/02/12 14:36:34 [INFO] Instantiating Filestore client for path https://file.googleapis.com/
	2020-02-12T14:36:34.149+0100 [DEBUG] plugin.terraform-provider-google-beta_v3.7.0_x5: 2020/02/12 14:36:34 [INFO] Instantiating Google Cloud IoT Core client for path https://cloudiot.googleapis.com/
	2020-02-12T1

	var (
	cursor int64
	items []string
	)

	results := make([]string, 0)

	for {
	values, err := redis.Values(conn.Do("SSCAN", key, cursor))
	if err != nil {

	Host *
	AddressFamily inet
	Compression yes
	ControlMaster auto
	ControlPath /tmp/ssh_mux_%h_%p_%r
	ControlPersist 720m
	User gabin
	IdentitiesOnly yes
	IdentityFile ~/.ssh/id_rsa
	ForwardAgent yes