daltonhuynh

// simple map and fold left/right implementations 
// in scala using pattern matching for List[Int]

def map(list:List[Int], f:(Int) => Int):List[Int] = {
  list match {
    case Nil => Nil
    case head::tail => f(head)::map(tail, f)
  }
}

MohamedAlaa

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

ibeex

A warning occurred (42 apples)
An error occurred

sshtmc

#!/bin/bash

HOST=$(hostname)

function install_postfix() {
echo | sudo debconf-set-selections <<__EOF
postfix	postfix/root_address	string	
postfix	postfix/rfc1035_violation	boolean	false
postfix	postfix/mydomain_warning	boolean	
postfix	postfix/mynetworks	string	127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128

nicolashery

Elasticsearch: updating the mappings and settings of an existing index

Note: This was written using elasticsearch 0.9.

Elasticsearch will automatically create an index (with basic settings and mappings) for you if you post a first document:

$ curl -X POST 'http://localhost:9200/thegame/weapons/1' -d \
'{
  "_id": 1,

sloria

The Best of the Best Practices (BOBP) Guide for Python

A "Best of the Best Practices" (BOBP) guide to developing in Python.

In General

Values

• "Build tools for others that you want to be built for you." - Kenneth Reitz
• "Simplicity is alway better than functionality." - Pieter Hintjens

abn

"""
An asynchronous task manager.

This is a simple implementation for background task handing. No guarentees are
provided for task execution.

This was developed in the course of the work don for the victims project and 
that version is available at 
https://github.com/victims/victims-web/blob/master/src/victims_web/handlers/task.py

hofmannsven

MySQL

Getting started

• http://www.sqlteaching.com/
• https://www.codecademy.com/learn/learn-sql
• https://www.codecademy.com/catalog/language/sql

Related tutorials

• MySQL-CLI
• Analyzing Business Metrics

Kartones

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

• -E: will describe the underlaying queries of the \ commands (cool for learning!)
• -l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

earldouglas

Real-World Functional Programming

May 28, 2014

This code is a companion to the APIcon presentation Real-World Functional Programming by @jearldouglas and @kelleyrobinson. The slides are available here.

In this code, we compare imperative and functional implementations of a withdraw function that might be used in a banking ATM.

Imperative transactions