Chợ Tết

Dải mây trắng đỏ dần trên đỉnh núi
Sương hồng lam ôm ấp nóc nhà gianh
Trên con đường viền trắng mép đồi xanh
Người các ấp tưng bừng ra chợ Tết,
Họ vui vẻ kéo hàng trên cỏ biếc
Những thằng cu áo đỏ chạy lon xon
Vài cụ già chống gậy bước lom khom
Cô yếm thắm che môi cười lặng lẽ
...

Google Hacks

Foreword

When we started Google, it was hard to predict how big it would become. That our search engine would someday serve as a catalyst for so many important web developments was a distant dream. We are honored by the growing interest in Google and offer many thanks to those who created this book - the largest and most comprehensive report on Google search technology that has yet to be published

Search is an amazing field of study, because it offers infinite possibilities for how we might find and make information avaiable to people. We join with the authors in encouraging readers to approach this book with a view toward discovering and creating new ways to search. Google's mission is to organize the world's information and make it universally accessible and useful, and we welcome any contribution you make toward achieving this goal.

PHP (Hypertext Preprocessor)

1. Các ngôn ngữ thường dùng trong thiết kế website
2. Giới thiệu về PHP
3. Chương trình PHP đơn giản
4. Biến và các kiểu dữ liệu
5. Các cấu trúc điều khiển
6. Xử lý xâu, flat file và liên kết đến file ngoài
7. Liên kết với cơ sở dữ liệu MySQL
8. Kết luận chung

Với một độ dài vừa phải, bài viết này không thể coi như một quyển sách về thiết kế website, bài viết chỉ nhằm mục đích tổng quát những công việc phải làm khi thiết kế một website bằng ngôn ngữ PHP. Bài viết sẽ giới thiệu từ ngôn ngữ cơ bản nhất không thể thiếu khi viết một trang web là ngôn ngữ HTML, tiếp đến là ngôn ngữ lập trình phía máy khách (client-side) Javascript và cuối cùng là phần chính của bài viết: ngôn ngữ lập trình phía máy chủ (server-side) PHP có kết hợp cơ sở dữ liệu MySQL. Hy vọng rằng sau khi đọc hết bài viết ngắn này, bạn sẽ có được cái nhìn tổng quát về các ngôn ngữ thường dùng khi thiết kế một website, trên cơ sở đó bạn có thể đọc những tài liệu chi tiết hơn về từng ngôn ngữ.
... ... ...

A Plan for Spam

I think it's possible to stop spam, and that content-based filters are the way to do it. The Achilles heel of the spammers is their message. They can circumvent any other barrier you set up. They have so far, at least. But they have to deliver their message, whatever it is. If we can write software that recognizes their messages, there is no way they can get around that.

To the recipient, spam is easily recognizable. If you hired someone to read your mail and discard the spam, they would have little trouble doing it. How much do we have to do, short of AI, to automate this process?

I think we will be able to solve the problem with fairly simple algorithms. In fact, I've found that you can filter present-day spam acceptably well using nothing more than a Bayesian combination of the spam probabilities of individual words. Using a slightly tweaked (as described below) Bayesian filter, we now miss less than 5 per 1000 spams, with 0 false positives.
... ... ...

A Tutorial for C/C++ Programming on Linux

Basic Checks

To start programming on Linux, you need a Linux installation, which has development packages installed. If you are not familiar with Linux installation, I would recommend getting help from friends/teachers or PLUG members.

Following example illustrates how to check existence of development tools. You should get a similar output.
$which gcc
/usr/bin/gcc
$which g++
/usr/bin/g++
$which make
/usr/bin/make
$which vi
/usr/bin/vi
$which pico
/usr/bin/pico
If you have afore-mentioned tools available, you are set to start. The last two, vi and pico are text editors. You can do with any text editor of your choice. However if you don't know where to look for, above are two very basic choices. Personally, I use kedit which is bundled with KDE.

C/C++ Compiler

The C compiler on Linux is a part of compiler suite, known as GCC(GNU Compiler Collection). This suite offers compilers for several languages. Following is a list of typical ones offered.

Unix Programming Tools

Introduction

This article explains the overall edit-compile-link-debug programming cycle and introduces several common Unix programming tools -- gcc, make, gdb, emacs, and the Unix shell. The goal is to describe the major features and typical uses of the tools and show how they fit together with enough detail for simple projects. We've used a version of this article at Stanford to help students get started with Unix.

Contents

Introduction — the compile-link process
The gcc compiler/linker
The make project utility
The gdb debugger
The emacs editor
Summary of Unix shell commands

Lionel Messi, pictured here on January 9, was awarded the 2011 FIFA Ballon d'Or at a star-studded ceremony in Zurich, the third consecutive year that he has won the prestigious award for the world's outstanding footballer. (AFP Photo/Franck Fife)