rhaberkorn

⍝ Left rotate ⍺ bit
Rot8 ← {2⊥⍺⌽(8⍴2)⊤⍵}
⍝ Addition and subtraction in finite field GF(2)
Add2 ← {⍺ ⊤≠ ⍵}
⍝ Multiplication in GF(2) [x]/(x8 + x4 + x3 + x + 1)
Mul2 ← {⊤≠/({⍵,$FF ⊤∧ ($11B×$80≤¯1↑⍵) ⊤≠ 2ׯ1↑⍵}⍣7 ⍺) × ⌽(8⍴2)⊤⍵}

⍝ Multiplicative inverse, calculated by brute force
Mul2Inv ← {$FF ⊤∧ 1⍳⍨⍵ Mul2¨⍳255}
SBox    ← {⊤≠/$63,(1-⍨⍳5) Rot8¨Mul2Inv ⍵}¨1-⍨⍳256

samoshkin

bind -T root F12  \
  set prefix None \;\
  set key-table off \;\
  set status-style "fg=$color_status_text,bg=$color_window_off_status_bg" \;\
  set window-status-current-format "#[fg=$color_window_off_status_bg,bg=$color_window_off_status_current_bg]$separator_powerline_right#[default] #I:#W# #[fg=$color_window_off_status_current_bg,bg=$color_window_off_status_bg]$separator_powerline_right#[default]" \;\
  set window-status-current-style "fg=$color_dark,bold,bg=$color_window_off_status_current_bg" \;\
  if -F '#{pane_in_mode}' 'send-keys -X cancel' \;\
  refresh-client -S \;\

bind -T off F12 \

marcan

#!/bin/sh
# Brainfuck interpreter implemented in pure POSIX sh builtins only (except I/O)
# Tested in bash and busybox ash (getchar uses a bash-specific read)

# === I/O ===
getchar() {
    # bashism
    IFS= read -rN 1 a
    if [ -z "$a" ]; then
        echo $th

lydell

// By Simon Lydell 2015.
// This file is in the public domain.

var stdin   = require("get-stdin")
var tools   = require("text-frequencies-analysis")
var helpers = require("text-frequencies-analysis/lib/helpers")

stdin(function(text) {
  process.stdout.write(tools.jsonStringifyRow(convert(JSON.parse(text))))
})

ijansch

<?php

// Issue 1, empty associative arrays (dictionaries) become regular arrays.

$dictionary = array('key' => 'value');
var_dump(json_encode($dictionary)); // gives '{"key":"value"}';

unset($dictionary['key']);

var_dump(json_encode($dictionary)); // Gives '[]' -> json dictionary turned into array

aras-p

// Just before switching jobs:
// Add one of these.
// Preferably into the same commit where you do a large merge.
//
// This started as a tweet with a joke of "C++ pro-tip: #define private public",
// and then it quickly escalated into more and more evil suggestions.
// I've tried to capture interesting suggestions here.
//
// Contributors: @r2d2rigo, @joeldevahl, @msinilo, @_Humus_,
// @YuriyODonnell, @rygorous, @cmuratori, @mike_acton, @grumpygiant,

willurd

Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000

eirikbacker

//addEventListener polyfill 1.0 / Eirik Backer / MIT Licence
(function(win, doc){
	if(win.addEventListener)return;		//No need to polyfill

	function docHijack(p){var old = doc[p];doc[p] = function(v){return addListen(old(v))}}
	function addEvent(on, fn, self){
		return (self = this).attachEvent('on' + on, function(e){
			var e = e || win.event;
			e.preventDefault  = e.preventDefault  || function(){e.returnValue = false}
			e.stopPropagation = e.stopPropagation || function(){e.cancelBubble = true}

xmms2addcover.pl

#!/usr/bin/perl
# Add cover images to XMMS2 medialib entries from file.
use strict;
use Audio::XMMSClient;

sub fold(&@) {
  my $f = shift;
  local ($a,$b) = (shift,undef);
  $a = $f->($a, $b) while defined ($b = shift);
  return $a;