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@pteich
pteich / main.go
Last active March 25, 2024 21:50
Example for using go's sync.errgroup together with signal detection signal.NotifyContext to stop all running goroutines
package main
import (
"context"
"errors"
"fmt"
"os/signal"
"syscall"
"time"

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.

FWIW: I (@rondy) am not the creator of the content shared here, which is an excerpt from Edmond Lau's book. I simply copied and pasted it from another location and saved it as a personal note, before it gained popularity on news.ycombinator.com. Unfortunately, I cannot recall the exact origin of the original source, nor was I able to find the author's name, so I am can't provide the appropriate credits.


Effective Engineer - Notes

What's an Effective Engineer?

@developit
developit / async-examples.js
Last active February 19, 2020 00:43
Async Array utilities in async/await. Now available as an npm package: https://github.com/developit/asyncro
/** Async version of Array.prototype.reduce()
* await reduce(['/foo', '/bar', '/baz'], async (acc, v) => {
* acc[v] = await (await fetch(v)).json();
* return acc;
* }, {});
*/
export async function reduce(arr, fn, val, pure) {
for (let i=0; i<arr.length; i++) {
let v = await fn(val, arr[i], i, arr);
if (pure!==false) val = v;
@oznu
oznu / README.md
Last active April 19, 2024 12:35
How to Bootcamp / Dual Boot Windows 10 on a mid-2011 iMac using USB

How to Install / Bootcamp Windows 10 on a mid-2011 iMac using USB

Apple has released support for bootcamping Windows 10, but only on 2012 Macs and later. Despite not being supported. it is possible to install Windows 10 on earlier iMacs and it seems to run quite well.

IMPORTANT: Unplug all external and physical hard drives (where possible) that you won't be installing to to avoid accidentally erasing them. Also make note of which drives and partitions remain (e.g. System and Storage hard drives), and be super careful to not erase the wrong one.

RECOVERY: If you nuke your machine, restore your time machine backup. Instructions here.

Requirements

@wesbos
wesbos / tab-trigger.js
Created November 16, 2015 19:33
How to properly get a TAB trigger working with Emmet inside of JSX
{
"keys": ["tab"],
"command": "expand_abbreviation_by_tab",
// put comma-separated syntax selectors for which
// you want to expandEmmet abbreviations into "operand" key
// instead of SCOPE_SELECTOR.
// Examples: source.js, text.html - source
"context": [
{
@imjasonh
imjasonh / markdown.css
Last active February 12, 2024 17:18
Render Markdown as unrendered Markdown (see http://jsbin.com/huwosomawo)
* {
font-size: 12pt;
font-family: monospace;
font-weight: normal;
font-style: normal;
text-decoration: none;
color: black;
cursor: default;
}
@justmoon
justmoon / custom-error.js
Last active April 22, 2024 17:19 — forked from subfuzion/error.md
Creating custom Error classes in Node.js
'use strict';
module.exports = function CustomError(message, extra) {
Error.captureStackTrace(this, this.constructor);
this.name = this.constructor.name;
this.message = message;
this.extra = extra;
};
require('util').inherits(module.exports, Error);
# Hello, and welcome to makefile basics.
#
# You will learn why `make` is so great, and why, despite its "weird" syntax,
# it is actually a highly expressive, efficient, and powerful way to build
# programs.
#
# Once you're done here, go to
# http://www.gnu.org/software/make/manual/make.html
# to learn SOOOO much more.
@andreas-marschke
andreas-marschke / run.sh
Created December 17, 2014 22:21
Small example LUA script for wg/wrk using a tiny JSON implementation(http://regex.info/blog/lua/json) to log test results to a file.
# Example usage with several configuration sets as in multiple connections durations and threads.
# You may go take the rest of the day off while this will run ;)
for duration in 10s 1m 10m 1h
do
for connections in 100 200 300 400 500 600
do
for thread in 1 2 3 4 5
do
wrk -d$duration -c$connections -t$thread -s wrk-script.lua http://localhost:4001/beacon/0001/demo-load-test/test/web