hellerbarde

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

1wErt3r

;SMBDIS.ASM - A COMPREHENSIVE SUPER MARIO BROS. DISASSEMBLY
;by doppelganger (doppelheathen@gmail.com)

;This file is provided for your own use as-is.  It will require the character rom data
;and an iNES file header to get it to work.

;There are so many people I have to thank for this, that taking all the credit for
;myself would be an unforgivable act of arrogance. Without their help this would
;probably not be possible.  So I thank all the peeps in the nesdev scene whose insight into
;the 6502 and the NES helped me learn how it works (you guys know who you are, there's no 

bellbind

/*
 * capturing from UVC cam
 * requires: libjpeg-dev
 * build: gcc -std=c99 capture.c -ljpeg -o capture
 */

#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

irees

Transitland Frequency Visualization

Accompanies blog post: Transit dimensions: Transitland Schedule API

The frequency.py script:

• Fetches all trips on a given date, between a start time and end time, inside of a bounding box
• Calculates the number of connections between every stop
• Uses a colormap and line width to show more frequent service
• Outputs a GeoJSON map as output.geojson

mminer

import Foundation

class MyService: NSObject, MyServiceProtocol {
    func upperCaseString(_ string: String, withReply reply: @escaping (String) -> Void) {
        let response = string.uppercased()
        reply(response)
    }
}

rmhsilva

A collection of information about accessing raw MultiTouch events on MacOS.

Useful URLS

• http://www.makeitgo.ws/articles/fingermgmt/
• https://github.com/fajran/tongseng/blob/master/Makefile
• https://github.com/calftrail/TrackMagic/blob/master/MultitouchSupport.h
• https://encyclopediaofdaniel.com/blog/making-the-magic-trackpad-work/
• https://github.com/calftrail/Touch/blob/master/TouchSynthesis/MultitouchSupport.h

AkdM

On Linux

Installing mkisofs

apt-get install mkisofs

Editing ISO image

mkdir /tmp/custom_iso

dive

;;; package --- Fix permissions for Emacs.app on macOS Catalina
;;; Author: Artem Loenko
;;; Mail-To: <artyom.loenko@mac.com>
;;; Commentary:
;;; Code:

(defconst _default-emacs-app-plist-path "/Applications/Emacs.app/Contents/Info.plist")
(defconst _temp-buffer-name "*fixing Emacs permissions*")
(defconst _temp-buffer (get-buffer-create _temp-buffer-name))
(with-current-buffer _temp-buffer (erase-buffer))

soffes

// From https://stackoverflow.com/a/58985069/118631

@available(macOS 10.15, *)
func canRecordScreen() -> Bool {
	let runningApplication = NSRunningApplication.current
	let processIdentifier = runningApplication.processIdentifier

	guard let windows = CGWindowListCopyWindowInfo([.optionOnScreenOnly], kCGNullWindowID)
		as? [[String: AnyObject]] else
	{

melaniehoff

Always Already Programming

Everyone who interacts with computers has in important ways always already been programming them.

Every time you make a folder or rename a file on your computer, the actions you take through moving your mouse and clicking on buttons, translate into text-based commands or scripts which eventually translate into binary.

Why are the common conceptions of programmer and user so divorced from each other? The distinction between programmer and user is reinforced and maintained by a tech industry that benefits from a population rendered computationally passive. If we accept and adopt the role of less agency, we then make it harder for ourselves to come into more agency.

We've unpacked the "user" a little, now let's look at the "programmer." When a programmer is writing javascript, they are using prewritten, packaged functions and variables in order to carry out the actions they want their code to do. In this way, the programmer is also the user. Why is using pre-made scripts seen