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:+1: | |
:-1: | |
:airplane: | |
:art: | |
:bear: | |
:beer: | |
:bike: | |
:bomb: | |
:book: | |
:bulb: |
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 |
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#!/usr/bin/env python | |
#-*- coding:utf-8 -*- | |
"""The login CLI for Shenzhen University IPv6. | |
""" | |
import argparse | |
import urllib | |
import getpass | |
import sys |
Attention: the list was moved to
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This page is not maintained anymore, please update your bookmarks.
# 单行注释 | |
""" 多行字符串可以用 | |
三个引号包裹,不过这也可以被当做 | |
多行注释 | |
""" | |
#################################################### | |
## 1. 原始数据类型和操作符 | |
#################################################### |
WARNING: If you're reading this in 2021 or later, you're likely better served by reading:
(This gist was created in 2013 and targeted the legacy GOPATH mode.)
$ ssh -A vm
$ git config --global url."[email protected]:".insteadOf "https://github.com/"
# taken from http://www.piware.de/2011/01/creating-an-https-server-in-python/ | |
# generate server.xml with the following command: | |
# openssl req -new -x509 -keyout server.pem -out server.pem -days 365 -nodes | |
# run as follows: | |
# python simple-https-server.py | |
# then in your browser, visit: | |
# https://localhost:4443 | |
import BaseHTTPServer, SimpleHTTPServer | |
import ssl |
(by @andrestaltz)
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.