Leandro López inkel

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Default http server

import (
    _ "net/http/pprof"
    "net/http"
)

Context

This is for programmers who want to ramp on Go, without resources that reiterate programming fundamentals. This would not be a good list of resources for folks who are learning to program using Go as their first language. Some resources that I dismiss here would be super valuable for newer folks. This is a selection of resources for those who understand programming fundamentals in a different language already.

Advice

First steps = Tour of Go
Don't waste time on Go Fundamentals-type books - it all lives in tour of Go.
Consider joining the Gophers Slack
When you need help, the Go Playground allows you make a quick scratch file and share it. Others trying to help can run your code easily this way.

INTRO

Concurrency is a domain I have wanted to explore for a long time because the locks and the race conditions have always intimidated me. I recall somebody suggesting concurrency patterns in golang because they said "you share the data and not the variables".

Amused by that, I searched for "concurrency in golang" and bumped into this awesome slide by Rob Pike: https://talks.golang.org/2012/waza.slide#1 which does a great job of explaining channels, concurrency patterns and a mini-architecture of load-balancer (also explains the above one-liner).

Let's dig in:

Goroutines

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.

Scaling your API with rate limiters

The following are examples of the four types rate limiters discussed in the accompanying blog post. In the examples below I've used pseudocode-like Ruby, so if you're unfamiliar with Ruby you should be able to easily translate this approach to other languages. Complete examples in Ruby are also provided later in this gist.

In most cases you'll want all these examples to be classes, but I've used simple functions here to keep the code samples brief.

Request rate limiter

This uses a basic token bucket algorithm and relies on the fact that Redis scripts execute atomically. No other operations can run between fetching the count and writing the new count.

How to setup Let's Encrypt for Nginx on Ubuntu 18.04 (including IPv6, HTTP/2 and A+ SLL rating)

Virtual hosts

Let's say you want to host domains first.com and second.com.

Create folders for their files:

	#!/usr/bin/env python3
	import pandas as pd
	import matplotlib.pyplot as plt
	import seaborn as sns
	from dateutil import parser


	# Custom date parser
	def custom_date_parser(date_string):
	date_string = date_string.split(" ")[0] + " " + date_string.split(" ")[1]

	#!/usr/bin/awk -f

	# This program is a copy of guff, a plot device. https://github.com/silentbicycle/guff
	# My copy here is written in awk instead of C, has no compelling benefit.
	# Public domain. @thingskatedid

	# Run as awk -v x=xyz ... or env variables for stuff?
	# Assumptions: the data is evenly spaced along the x-axis

	# TODO: moving average

	// Copyright 2016 Google Inc. All rights reserved.
	// Use of this source code is governed by the Apache 2.0
	// license that can be found in the LICENSE file.

	// Command caption reads an audio file and outputs the transcript for it.
	package main

	import (
	"fmt"
	"io"

	set -g default-terminal "screen-256color"
	# change prefix command to C-z
	set -g prefix C-z
	unbind C-b
	bind C-z last-window
	bind z send-prefix

	# setup \| and - for window splitting
	unbind %
	bind \| split-window -h