bzerangue

find . -name "*.ht*" | while read i; do pandoc -f html -t markdown "$i" -o "${i%.*}.md"; done

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

sergeimuller

Note 1: The following CQ curl commands assumes a admin:admin username and password.
Note 2: For Windows/Powershell users: use two "" when doing a -F cURL command.
        Example: -F"":operation=delete""
Note 3: Quotes around name of package (or name of zip file, or jar) should be included.

Uninstall a bundle (use http://localhost:4505/system/console/bundles to access the Apache Felix web console)
        curl -u admin:admin -daction=uninstall http://localhost:4505/system/console/bundles/"name of bundle"

Install a bundle
        curl -u admin:admin -F action=install -F bundlestartlevel=20 -F 

monperrus

import java.io.*;
import java.util.*;

/** The class encapsulates an implementation of the Apriori algorithm
 * to compute frequent itemsets.
 * 
 * Datasets contains integers (>=0) separated by spaces, one transaction by line, e.g.
 * 1 2 3
 * 0 9
 * 1 9

obstschale

Octave CheatSheet

GNU Octave is a high-level interpreted language, primarily intended for numerical computations.
(via GNU Octave)

Hint: I also mad an octave docset for Dash: https://github.com/obstschale/octave-docset

Basics

wernight

#!/usr/bin/env python
"""Use inotify to watch a directory and execute a command on file change.

Watch for any file change below current directory (using inotify via pyinotify)
and execute the given command on file change.

Just using inotify-tools `while inotifywait -r -e close_write .; do something; done`
has many issues which are fixed by this tools:
 * If your editor creates a backup before writing the file, it'll trigger multiple times.
 * If your directory structure is deep, it'll have to reinitialize inotify after each change.

tsiege

ANNOUNCEMENT

I have moved this over to the Tech Interview Cheat Sheet Repo and has been expanded and even has code challenges you can run and practice against!






\

dz

DZSlack

What is this?

The following files add some view keybindings and other functional and styling changes to Slack when used inside of a Fluid app.

Specifically:

1. <cmd>-number will bring you to the respective starred channel. For example, if you have 4 starred channels, <cmd-1> will bring you to the first starred channel, <cmd-2> to the second, etc.

sephiroth74

git log --all --numstat --pretty="%H" --author="author" --since=1.year | awk 'NF==3 {plus+=$1; minus+=$2} NF==1 {total++} END {printf("lines added: +%d\nlines deleted: -%d\ntotal commits: %d\n", plus, minus, total)}'

indiesquidge

Homebrew

How To

Homebrew is a package management system for OS X. You can read more about it here, or simply run

ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

to install it.