joestump

San Francisco by Foot

• You can start anywhere in the Castro, Mission (home of the burrito), or downtown. I'd recommend starting at Chow at Market & Church or The Pork Store on 16th at Valencia. If you wanted to go upscale on the weekend, Maverick at 17th and Mission is a fantastic brunch. Another option is to start in Chinatown (just north of Union Squre) for dim sum.
• From Castro take one of the N, J, etc. trains (every light rail train route in the city intersects at Church and Market) down to the Powell Street station. From the Mission you can take BART a couple of stops up to Powell Street.
• Once at Powell Street hop on the Powell Street trolley. A quintessential SF experience.
• Take the trolley up through the city where it will eventually stop at Lombard Street, which is known as the most crooked street in the world. Walk down the hill, take a few pictures and laugh at the tourists trying to drive down the damn thing.
• Once at the bottom of the hill, turn left. You'll be walking towards the w

lelandbatey

Description

This simple script will take a picture of a whiteboard and use parts of the ImageMagick library with sane defaults to clean it up tremendously.

The script is here:

#!/bin/bash
convert "$1" -morphology Convolve DoG:15,100,0 -negate -normalize -blur 0x1 -channel RBG -level 60%,91%,0.1 "$2"

Results

max-mapper

note: I converted this script into the much easier to install joinopenwifi module on NPM

see https://github.com/maxogden/joinopenwifi#joinopenwifi for installation instructions

max-mapper

var gpio = require("gpio")
var gpio22, intervalTimer

// Flashing lights if LED connected to GPIO22
gpio22 = gpio.export(22, {
  ready: blinkLED
})

function blinkLED() {
  intervalTimer = setInterval(function() {

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

visualmotive

// Python equivalent:
// string[start:end]
function tt_str_slice($string, $start=NULL, $end=NULL) {
    $length = strlen($string);

    if ($start === NULL) {
        $start = 0;
    } else if ($start < 0) {
        $start = $length + $start;
        if ($start < 0) {