andreybolonin

Libuv and libev, two I/O libraries with similar names, recently had the privilege to use both libraries to write something. Now let's talk about my own subjective expression of common and different points.

The topic of high-performance network programming has been discussed. Asynchronous, asynchronous, or asynchronous. Whether it is epoll or kqueue, it is always indispensable to the asynchronous topic.

Libuv is asynchronous, and libev is synchronous multiplexing IO multiplexing.

Libev is a simple encapsulation of system I/O reuse. Basically, it solves the problem of different APIs between epoll and kqueuq. Ensure that programs written using livev's API can run on most *nix platforms. However, the disadvantages of libev are also obvious. Because it basically just encapsulates the Event Library, it is inconvenient to use. For example, accept(3) requires manual setnonblocking after connection. EAGAIN, EWOULDBLOCK, and EINTER need to be detected when reading from a socket. This is a

henfiber

Europe

• SkinFlint : Price comparison site which has some nice filtering options per switch type etc. Searches for offers in UK, Germany, Poland and Austria
• mykeyboard.eu : Keyboards, keycaps and accessories. Based in Belgium.
• candykeys.com : European Store selling Vortex, Leopold, KBP, Anne Pro keyboards, keycap sets and components (ISO + ANSI). Based in Germany, ships to EU.
• falba.tech : custom wooden bamboo cases, and some acrylic and carbon ones. Switch packs (65 browns at 48EUR). Other parts for the GH60, Atreus, ErgoDox. Also Microcontrollers, diodes, leds etc.
• 42keebs.eu - Mostly PCBs, tools and accessories. Located in Czech Republic.
• KEYGEM : Switches, Keycaps, lubes, cables, DIY kits and deskmats. Based in Germany, ships to the EU and worldwide.
• [Eloquent Clicks - Custom Mechanical Keyboard Store](https://www.eloquen

arbourd

1. Open Powershell as an administrator
2. Run

   Get-ItemProperty HKLM:\SYSTEM\CurrentControlSet\Enum\HID\*\*\Device` Parameters FlipFlopWheel -EA 0 | ForEach-Object { Set-ItemProperty $_.PSPath FlipFlopWheel 1 }

3. Verify that all mice devices have had their FlipFlopWheel attributes set to 1

   Get-ItemProperty HKLM:\SYSTEM\CurrentControlSet\Enum\HID\*\*\Device` Parameters FlipFlopWheel -EA 0

4. Reboot

bhundven

#!/bin/bash
# vi: ts=4:sw=4:et
#
# NINETEEN.SH
# This script allows you to install/update Enlightenment 19 git version on
# Ubuntu 14.04 LTS or Debian wheezy/sid, or remove E19 git from your system.
# Originally from: http://ubuntuforums.org/showthread.php?t=2203190
# By: Philippe J. Guillaumie (batden AT sfr DOT fr).
# Additional updates by: Bryan Hundven (bryanhundven AT gmail DOT com).
#

chaitanyagupta

Reader Macros in Common Lisp

This post also appears on lisper.in.

Reader macros are perhaps not as famous as ordinary macros. While macros are a great way to create your own DSL, reader macros provide even greater flexibility by allowing you to create entirely new syntax on top of Lisp.

Paul Graham explains them very well in [On Lisp][] (Chapter 17, Read-Macros):

The three big moments in a Lisp expression's life are read-time, compile-time, and runtime. Functions are in control at runtime. Macros give us a chance to perform transformations on programs at compile-time. ...read-macros... do their work at read-time.

cky

(use-srfis '(1 69))
(read-hash-extend #\#
  (lambda (c port)
    (define ht (make-hash-table eqv?))
    (define (ht-ref key)
      (hash-table-ref ht key (lambda ()
                               (define sym (gensym))
                               (hash-table-set! ht key sym)
                               sym)))
    (define (hash-key x)

josevalim

# Elixir v1.0
defmodule Rules do
  defmacro __using__(_) do
    quote do
      import unquote(__MODULE__)
      @before_compile unquote(__MODULE__)
      @rules []
    end
  end

HarryR

#lang racket
(require ffi/unsafe
         ffi/unsafe/define)

(define-ffi-definer define-libevent (ffi-lib "libevent"))

; Event Base
(define evbase-ptr (_cpointer 'evbase))
(define-libevent event_base_new (_fun -> evbase-ptr))
(define-libevent event_base_dispatch (_fun evbase-ptr -> _void))

coderoshi

A Very Short Guide to Writing Guides

This is just a few thoughts on the topic of writing technical guides. This was intended for Basho's engineering team, but this may apply to open source projects in general.

Audience

It's commonly preached that the first step in writing is to identify your audience; to whom are you writing? This is the most well known, most repeated, and most overlooked step of writing in general and technical writing in particular. Take this document, for example. My audience is technical people who need to communicate technical information, and not teenagers, so I shy away from images of pop icons and memes. I use jargon and words like "identify" rather than "peep this".

Pronouns

myguidingstar-zz

#!/bin/sh

convertibles=('À' 'Á' 'Ả' 'Ã' 'Ạ' 'Ằ' 'Ắ' 'Ẳ' 'Ẵ' 'Ặ' 'Ă' 'Ầ' 'Ấ' 'Ẩ' 'Ẫ' 'Ậ' 'Â' 'È' 'É' 'Ẻ' 'Ẽ' 'Ẹ' 'Ề' 'Ế' 'Ể' 'Ễ' 'Ệ' 'Ê' 'Ì' 'Í' 'Ỉ' 'Ĩ' 'Ị' 'Ò' 'Ó' 'Ỏ' 'Õ' 'Ọ' 'Ồ' 'Ố' 'Ổ' 'Ỗ' 'Ộ' 'Ô' 'Ờ' 'Ớ' 'Ở' 'Ỡ' 'Ợ' 'Ơ' 'Ù' 'Ú' 'Ủ' 'Ũ' 'Ụ' 'Ừ' 'Ứ' 'Ử' 'Ữ' 'Ự' 'Ư' 'Ỳ' 'Ý' 'Ỷ' 'Ỹ' 'Ỵ' 'Đ' 'à' 'á' 'ả' 'ã' 'ạ' 'ằ' 'ắ' 'ẳ' 'ẵ' 'ặ' 'ă' 'ầ' 'ấ' 'ẩ' 'ẫ' 'ậ' 'â' 'è' 'é' 'ẻ' 'ẽ' 'ẹ' 'ề' 'ế' 'ể' 'ễ' 'ệ' 'ê' 'ì' 'í' 'ỉ' 'ĩ' 'ị' 'ò' 'ó' 'ỏ' 'õ' 'ọ' 'ồ' 'ố' 'ổ' 'ỗ' 'ộ' 'ô' 'ờ' 'ớ' 'ở' 'ỡ' 'ợ' 'ơ' 'ù' 'ú' 'ủ' 'ũ' 'ụ' 'ừ' 'ứ' 'ử' 'ữ' 'ự' 'ư' 'ỳ' 'ý' 'ỷ' 'ỹ' 'ỵ' 'đ')

#Usage: convertTo charsetName id
function convertTo() {
  printf "${convertibles[$2]}" | uvconv -f UTF-8 -t $1 | hexdump -e '1/1 "%02X"'
  }

#Usage: makeTable charsetName