Ivan Poddubny ipoddubny

I recently happened upon a very interesting implementation of popen() (different API, same idea) called popen-noshell using clone(2), and so I opened an issue requesting use of vfork(2) or posix_spawn() for portability. It turns out that on Linux there's an important advantage to using clone(2). I think I should capture the things I wrote there in a better place. A gist, a blog, whatever.

This is not a paper. I assume reader familiarity with fork() in particular and Unix in general, though, of course, I link to relevant wiki pages, so if the unfamiliar reader is willing to go down the rabbit hole, they should be able to come ou

Список #FollowFriday от 2015-07-10 по версии @jsunderhood

Ещё один энтузиаст React. Великолепно, что опыты Дэна @dan_abramov делают счастливыми не только его, но и нас.

Вячеслав @vslinko экспериментирует с React и не пишет в твиттер всяких глупостей. Только JS, только хардкор!

Любознательный разработчик Алексей @alexeyraspopov и его гитхаб https://github.com/alexeyraspopov

Ингвар @RReverser рассказывает по-английски про инструменты разработки JS-программиста

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

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

TLDR:

Please stop overvaluing your time at the expense of your users. It is easy to get caught up in a features pissing contest with that other startup down the road, but don't lose sight of your mission. Take one problem that people have and solve it. Well. All of it. All of the time.

Last year I read the wonderfully concise essay Half, Not Half-Assed by the 37 Signals team.

It took me more than five minutes to figure it out, but the time spent thinking was definitely worth it. Talking with coworkers, friends, or conference attendees about those handful of paragraphs reinforces this.

A slightly updated version of this doc is here on my website.

Why I Like Go

I visited with PagerDuty yesterday for a little Friday beer and pizza. While there I got started talking about Go. I was asked by Alex, their CEO, why I liked it. Several other people have asked me the same question recently, so I figured it was worth posting.

Goroutines

The first 1/2 of Go's concurrency story. Lightweight, concurrent function execution. You can spawn tons of these if needed and the Go runtime multiplexes them onto the configured number of CPUs/Threads as needed. They start with a super small stack that can grow (and shrink) via dynamic allocation (and freeing). They are as simple as go f(x), where f() is a function.

	#include <stdio.h>
	#include <stdlib.h>
	#include <stdint.h>
	#ifdef _MSC_VER
	#include <intrin.h> /* for rdtscp and clflush */
	#pragma optimize("gt",on)
	#else
	#include <x86intrin.h> /* for rdtscp and clflush */
	#endif

	#include <stdio.h>
	#include <stdlib.h>
	#include <stdint.h>
	#ifdef _MSC_VER
	#include <intrin.h> /* for rdtscp and clflush */
	#pragma optimize("gt",on)
	#else
	#include <x86intrin.h> /* for rdtscp and clflush */
	#endif

	#!/bin/bash

	# This is a modification of gitlab-gc.sh script created by Peter Bábics (pbabics/gitlab-gc.sh)

	# Improvements
	# - Searching in all BASE_PATH, not fixing the search to a depth of 2
	# - Directories without valid tags or revisions directories won't be processed (to avoid unexpected issues)
	# - Logging in case there's nothing to delete
	# - running registry-garbage-collect only when something has been deleted

	# Utilities for quickly accessing frequently used directories in bash.

	# Usage:
	# $ cd /path/to/project/src/
	# $ mark code # Will create a new shortcut.
	# # Becomes interactive if a shortcut already exists
	# # m is an alias for mark. You can also `m code`
	#
	# $ code # From now on, running this anywhere in the shell
	# # will put you in /path/to/project/src/code