gsauthof

// source: http://unix.stackexchange.com/a/163115/1131
// GS, 2016-01-27, simplify the code a little bit

#include <QApplication>
#include <QTimer>
#include <QClipboard>
#include <QMimeData>
#include <QDebug>
#include <string>
#include <iostream>

gsauthof

/*

Illustrate how the & operator can be omitted when getting a function pointer.

In reply to: https://www.youtube.com/watch?v=z-kUhwANrIw

2016, Georg Sauthoff

 */

gsauthof

// in reply to http://verse.systems/blog/post/2016-07-18-Software-Engineering-Teaching/

unsigned fibonacci(unsigned n) {
    unsigned a = 0, b = 1;
    unsigned sum = 0;
    for ( ; n > 0; --n) {
        unsigned t = b;
        b += a;
        a = t;
        sum += a;

gsauthof

% curl -L -o signature.png \
%  'https://upload.wikimedia.org/wikipedia/commons/thumb/6/62/Beethoven_Signature.svg/150px-Beethoven_Signature.svg.png'
% compile twice: pdflatex sig_overlay.tex
\documentclass{article}
\usepackage{blindtext}
\usepackage{graphicx}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}[remember picture,overlay]
  \node [xshift=150mm,yshift=-80mm]

gsauthof

// re: http://stackoverflow.com/questions/28489153/how-to-portably-compute-a-sha1-hash-in-c/39833022#39833022

#include <boost/uuid/sha1.hpp>
#include <boost/detail/endian.hpp>
#include <boost/algorithm/hex.hpp>
#include <boost/range/iterator_range_core.hpp>
#include <boost/endian/conversion.hpp>
#include <iostream>
#include <stdio.h>
using namespace std;

gsauthof

/* For illustrating how orphaned children aren't necessarily adopted
   by PID 1.

   See also: http://stackoverflow.com/questions/284325/how-to-make-child-process-die-after-parent-exits/36945270#36945270

   2016, Georg Sauthoff <mail@georg.so>
*/


#include <unistd.h>

gsauthof

# in reply to: https://groups.google.com/d/msg/django-developers/6mm42rrQXww/Yee5KJjVBQAJ
# (pull request: write feeds with ordered attributes)
# cf. https://github.com/django/django/pull/8044
#
# Results:
# - generating one feed: ~ 0.01 s (current Laptop, i7, SSD)
# - sorting + OrderedDict() in SimpleXMLGenerator::startElement(): + ~ 27 %
# - sorting + OrderedDict() iff there are attributes: + ~ 18 %
# - replacing {} with [] for attributes in feedgenerator: + ~ 7 %

gsauthof

class Last_Lines:
  def __init__(self, n, binary=True):
    self.n = n
    self.binary = binary
    self.lines = []
    # asyncssh calls fstat() on fileno() and checks if it is a regular file
    # thus we open any regular file to fake it ...
    self.dev_null = open('/etc/resolv.conf')
  def write(self, s):
    lines = s.splitlines(True)

gsauthof

#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>

int main()
{
    int pid = vfork();
    if (pid == 0) {
        _exit(0);
    }

gsauthof

/* Demonstrate how to overwrite the original value of
   an environment variable in the original environment vector
   that is easily observable from other processes
   (with sufficient permissions, i.e. same user or root).
 */

/** {{{ MIT No Attribution

Copyright 2019 Georg Sauthoff <mail@georg.so>