larsmans

#!/usr/bin/python
#
# K-means clustering using Lloyd's algorithm in pure Python.
# Written by Lars Buitinck. This code is in the public domain.
#
# The main program runs the clustering algorithm on a bunch of text documents
# specified as command-line arguments. These documents are first converted to
# sparse vectors, represented as lists of (index, value) pairs.

from collections import defaultdict

tausen

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <pthread.h>
#include <unistd.h>
#include <semaphore.h>

sem_t semaphore;

void threadfunc() {

jdeoliveira

/Library/PostgreSQL/9.1/bin/pg_dump --host localhost --port 5432 --username <USERNAME> -b -c -E UTF-8 --no-owner --no-privileges --no-tablespaces --clean --schema public -F c -Z 9 -f <BACKUPFILENAME> <DATABASENAME>
/Library/PostgreSQL/9.1/bin/pg_restore --host localhost --port 5432 --username <USERNAME> --dbname <DATABASENAME> --no-owner --no-privileges --no-tablespaces --clean --schema public "<BACKUPFILENAME>"

seberg

def rolling_window(array, window=(0,), asteps=None, wsteps=None, axes=None, toend=True):
    """Create a view of `array` which for every point gives the n-dimensional
    neighbourhood of size window. New dimensions are added at the end of
    `array` or after the corresponding original dimension.
    
    Parameters
    ----------
    array : array_like
        Array to which the rolling window is applied.
    window : int or tuple

afair

==========================================          ==========================================
             TMUX COMMAND                                        WINDOW (TAB)
==========================================          ==========================================

List    tmux ls                                     List         ^b w
New          new -s <session>                       Create       ^b c
Attach       att -t <session>                       Rename       ^b , <name>
Rename       rename-session -t <old> <new>          Last         ^b l               (lower-L)
Kill         kill-session -t <session>              Close        ^b &

yorickvP

ifdef VERBOSE
        Q =
        E = @true 
else
        Q = @
        E = @echo 
endif

CFILES := $(shell find src -mindepth 1 -maxdepth 4 -name "*.c")
CXXFILES := $(shell find src -mindepth 1 -maxdepth 4 -name "*.cpp")

cowboy

#!/bin/bash

# Might as well ask for password up-front, right?
sudo -v

# Keep-alive: update existing sudo time stamp if set, otherwise do nothing.
while true; do sudo -n true; sleep 60; kill -0 "$$" || exit; done 2>/dev/null &

# Example: do stuff over the next 30+ mins that requires sudo here or there.
function wait() {

matthewlehner

#!/bin/bash
#
# PostgreSQL Backup Script Ver 1.0
# http://autopgsqlbackup.frozenpc.net
# Copyright (c) 2005 Aaron Axelsen <axelseaa@amadmax.com>
#
# This script is based of the AutoMySQLBackup Script Ver 2.2
# It can be found at http://sourceforge.net/projects/automysqlbackup/
#
# The PostgreSQL changes are based on a patch agaisnt AutoMySQLBackup 1.9

andreyvit

tmux cheat sheet

(C-x means ctrl+x, M-x means alt+x)

Prefix key

The default prefix is C-b. If you (or your muscle memory) prefer C-a, you need to add this to ~/.tmux.conf:

remap prefix to Control + a

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