thuandt

#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""Chương trình chuyển đổi từ Tiếng Việt có dấu sang Tiếng Việt không dấu
Chỉnh sửa từ mã nguồn của anh NamNT
http://www.vithon.org/2009/06/14/x%E1%BB%AD-ly-ti%E1%BA%BFng-vi%E1%BB%87t-trong-python
"""

import re

INTAB = "ạảãàáâậầấẩẫăắằặẳẵóòọõỏôộổỗồốơờớợởỡéèẻẹẽêếềệểễúùụủũưựữửừứíìịỉĩýỳỷỵỹđẠẢÃÀÁÂẬẦẤẨẪĂẮẰẶẲẴÓÒỌÕỎÔỘỔỖỒỐƠỜỚỢỞỠÉÈẺẸẼÊẾỀỆỂỄÚÙỤỦŨƯỰỮỬỪỨÍÌỊỈĨÝỲỶỴỸĐ"

thuandt

#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
#      Filename:  prime.py
#
#   Description:  Tìm số nguyên tố lớn nhất có 9 chữ số khác nhau
#
#       Created:  12/09/2012 06:32:33 AM
# Last Modified:  12/09/2012 06:40:49 AM

thuandt

One of the most common tasks that requires random action is selecting one item from a group, be it a character from a string, unicode, or buffer, a byte from a bytearray, or an item from a list, tuple, or xrange. It’s also common to want a sample of more than one item.

Don’t do this when randomly selecting an element

A naive approach to these tasks involves something like the following; to select a single item, you would use randrange (or randint) from the random module, which generates a pseudo-random integer from the range indicated by its arguments:

import random
 
items = ['here', 'are', 'some', 'strings', 'of',

thuandt

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

thuandt

import sys


def gcd(a, b):
    t = b
    b = a % b
    if b == 0:
        return t
    else:
        return gcd(t, b)

thuandt

#include <GL/gl.h>
#include <GL/glut.h>

GLubyte rasters[24] = { 0x00, 0x00,
                        0x06, 0x00,
                        0x06, 0x00,
                        0x06, 0x00,
                        0x06, 0x00,
                        0x06, 0x00,
                        0x06, 0x00,

thuandt

#include <GL/gl.h>
#include <GL/glut.h>
#include <cmath>

static GLfloat spin = 0.0;

void init(void)
{
    glClearColor(0.0, 0.0, 0.0, 0.0);
    glShadeModel(GL_FLAT);

thuandt

Umask 	Created Files 		Created Directories
-------------------------------------------------------------
000 	666 (rw-rw-rw-) 	777 	(rwxrwxrwx)
002 	664 (rw-rw-r--) 	775 	(rwxrwxr-x)
022 	644 (rw-r--r--) 	755 	(rwxr-xr-x)
027 	640 (rw-r-----) 	750 	(rwxr-x---)
077 	600 (rw-------) 	700 	(rwx------)
277 	400 (r--------) 	500 	(r-x------)

thuandt

Ctrl + A    Go to the beginning of the line you are currently typing on
Ctrl + E    Go to the end of the line you are currently typing on
Ctrl + L    Clears the Screen, similar to the clear command
Ctrl + U    Clears the line before the cursor position. If you are at the end of the line, clears the entire line.
Ctrl + H    Same as backspace
Ctrl + R    Let’s you search through previously used commands
Ctrl + C    Kill whatever you are running
Ctrl + D    Exit the current shell
Ctrl + Z    Puts whatever you are running into a suspended background process. fg restores it.
Ctrl + W    Delete the word before the cursor

thuandt

Instructions for switching to RAID 1 for XenServer 6.2 with GPT

• Create new partition for Local Storage

# gdisk /dev/sda

• Check /dev/sda partition table