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def changed(l):
    l.append("a")  #  change the original object

def unchanged(l):
    l = l + ["a"]  # l + ["a"] will create a new list, instead of changing the original object

l1 = []
changed(l1)
# l1 == ["a"]

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# simple iteration
a = []
for x in range(10):
    a.append(x*2)
# a == [0, 2, 4, 6, 8, 10, 12, 14, 16, 18]

# list comprehension
a = [x*2 for x in range(10)]

# dict comprehension

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# create virtual env
virtualenv --no-site-packages --python=python3.2 ./venv

# activate virtual env
source ./venv/bin/activate
# install requirements
pip install -r requirements.txt

#.....
# update requirements

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# 计算列表内所有元素的和, 包括基本loop方式，sum函数方式，以及使用reduce函数

# the basic way
s = 0
for x in range(10):
    s += x

# the right way
s = sum(range(10))

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def memoize(f):
    memo = {}  #  将结果缓存在memo字典对象中，key是参数，value是结果。
    def helper(x):
        if x not in memo:            
            memo[x] = f(x)
        return memo[x]
    return helper

# 修饰fib函数，任何fib函数的调用，将首先察看是否已经有缓存的结果
@memoize

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def argument_test_natural_number(f):
    def helper(x):
        if type(x) == int and x > 0:
            return f(x)
        else:
            raise Exception("Argument is not an integer")
    return helper
    
@argument_test_natural_number
def faculty(n):

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// node.js proxy server example for adding CORS headers to any existing http services.
// yes, i know this is super basic, that's why it's here. use this to help understand how http-proxy works with express if you need future routing capabilities
 
var httpProxy = require('http-proxy'),
    express = require('express');
		
var proxy = new httpProxy.RoutingProxy();
 
var proxyOptions = {
    host: 'ats.borqs.com',

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#!/usr/bin/env python
# -*- coding: utf-8 -*-

"""
"""

import jsonrpclib
import os
import urllib2
import subprocess

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import bottle
from wsgiproxy.app import WSGIProxyApp

# Remove "hop-by-hop" headers (as defined by RFC2613, Section 13)
# since they are not allowed by the WSGI standard.
FILTER_HEADERS = [
    'Connection',
    'Keep-Alive',
    'Proxy-Authenticate',
    'Proxy-Authorization',

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// Source: https://groups.google.com/forum/#!topic/angular/hVrkvaHGOfc
// jsFiddle: http://jsfiddle.net/pkozlowski_opensource/PxdSP/14/
// author: Pawel Kozlowski

var myApp = angular.module('myApp', []);

//service style, probably the simplest one
myApp.service('helloWorldFromService', function() {
    this.sayHello = function() {
        return "Hello, World!"