Leon Lee leonlee

Install Python

$ brew install readline sqlite gdbm
$ brew install python --universal --framework
$ python --version
Python 2.7

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The introduction to Reactive Programming you've been missing

(by @andrestaltz)

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

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Templates in C++ vs Generics in Java

Templates and generics allow us to achieve very similar results using very similar code syntax in C++ and Java respectively. But despite that, the implementation of these two features and their semantics are vastly different under the hood.

Syntax and Usage

Templates

Let us consider first the case of a template called Pair in C++.

	## Configure eth0
	#
	# vi /etc/sysconfig/network-scripts/ifcfg-eth0

	DEVICE="eth0"
	NM_CONTROLLED="yes"
	ONBOOT=yes
	HWADDR=A4:BA:DB:37:F1:04
	TYPE=Ethernet
	BOOTPROTO=static

	package pt.impresa.iweb.filters.request;

	import java.io.IOException;
	import java.text.Normalizer;
	import java.util.Collections;
	import java.util.Enumeration;
	import java.util.HashMap;
	import java.util.Map;
	import java.util.Set;
	import java.util.regex.Pattern;

	global
	log 127.0.0.1 local0
	log 127.0.0.1 local1 notice
	maxconn 4096
	uid 99
	gid 99
	daemon

	defaults
	log global

	#!/bin/bash

	# options:
	# remove stopped containers and untagged images
	# $ dkcleanup
	# remove all stopped\|running containers and untagged images
	# $ dkcleanup --reset
	# remove containers\|images\|tags matching {repository\|image\|repository\image\|tag\|image:tag}
	# pattern and untagged images
	# $ dkcleanup --purge {image}

	# Start the old vagrant
	$ vagrant init centos-6.3
	$ vagrant up

	# You should see a message like:
	# [default] The guest additions on this VM do not match the install version of
	# VirtualBox! This may cause things such as forwarded ports, shared
	# folders, and more to not work properly. If any of those things fail on
	# this machine, please update the guest additions and repackage the
	# box.