Maksim Sokolnikov Bablzz

Golang — Understanding channel, buffer, blocking, deadlock and happy groutines.

I was so confused to understand behaviior of Golang channels, buffer, blocking, deadlocking and groutines.

I read Go by Example topics.

Ansible variable precedence

Source: http://docs.ansible.com/ansible/latest/playbooks_variables.html#variable-precedence-where-should-i-put-a-variable

From least to most important

command line values (for example, -u my_user, these are not variables)
role defaults (defined in role/defaults/main.yml)
inventory file or script group vars
inventory group_vars/all

Methods of Signing Git Commits on MacOS

Last updated March 13, 2024

This Gist explains how to sign commits using gpg in a step-by-step fashion. Previously, krypt.co was heavily mentioned, but I've only recently learned they were acquired by Akamai and no longer update their previous free products. Those mentions have been removed.

Additionally, 1Password now supports signing Git commits with SSH keys and makes it pretty easy-plus you can easily configure Git Tower to use it for both signing and ssh.

For using a GUI-based GIT tool such as Tower or Github Desktop, follow the steps here for signing your commits with GPG.

#Use pprof debug docker daemon

Use pprof debug docker daemon
pprof debug entrypoint
Start docker daemon in debug mode
Run socat to make docker sock available via tcp port
Access debug url entrypoint

Quick demo of how to initialize your data structure with optional configuration parameters ... with sane defaults if left unspecified.

This functional config technique ...

lets you write APIs that can evolve without pain
provides meaningful configuration parameters
makes it easy to set default settings
makes it possible to set complex conditional values

To remove a submodule you need to:

Delete the relevant section from the .gitmodules file.
Stage the .gitmodules changes git add .gitmodules
Delete the relevant section from .git/config.
Run git rm --cached path_to_submodule (no trailing slash).
Run rm -rf .git/modules/path_to_submodule (no trailing slash).
Commit git commit -m "Removed submodule "
Delete the now untracked submodule files rm -rf path_to_submodule

1. Clone your fork:

git clone [email protected]:YOUR-USERNAME/YOUR-FORKED-REPO.git

2. Add remote from original repository in your forked repository:

cd into/cloned/fork-repo
git remote add upstream git://github.com/ORIGINAL-DEV-USERNAME/REPO-YOU-FORKED-FROM.git
git fetch upstream

	use std::fmt;

	enum FizzBuzzOr {
	Fizzbuzz(&'static str),
	Or(i32)
	}

	impl fmt::Display for FizzBuzzOr {
	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
	use FizzBuzzOr::*;

	package main

	import "fmt"

	func main() {
	slice := make([]int, 159)

	// Split the slice into batches of 20 items.
	batch := 20

	Question:
	. How to run Ansible without specifying the inventory but the host directly?
	. Run a playbook or command with arbitrary host not in the inventory hosts list?
	. run ansible with arbitrary host/ip without inventory?

	Answer:
	Surprisingly, the trick is to append a ,
	The host parameter preceding the , can be either a hostname or an IPv4/v6 address.

	ansible all -i example.com,