Original address: http://blog.csdn.net/ypist/article/details/8571032
1. Basic knowledge:
SurfaceView inherits from View. View is responsible for updating the animation in the ma
Tag: Day
DAY-08 file operation
Three kinds of strings span> 1. Ordinary string: u’Using characters as output unit’
print(u’abc’) < span style="color: #008000;"># for display 2. Binary character string: b’Binary character
Day41 – numeric type, integrity constraint
day41 Numeric type Integer type
mysql> create table t1(id tinyint); # The default is signed, that is, there is a sign before the number Unsigned setting mysql> create table t1(id tinyint uns
PostgreSQL – the inconsistency between the month, Japanese and seconds of the interval data type
I understand why postgresql uses month, day and second fields to represent the sql interval data type. If it involves daylight saving time adjustments, the length of a month is not always the same.
Day24_2014 days of the 24th day – object-oriented three major features, duck types, class constraints, depth analysis of Super
day24 Three Object-Oriented Features Inheritance, encapsulation, polymorphism Encapsulation: Put a bunch of things (code, data) in one place (space), and you can use it
class Student: def __
day 26
Contents
transmission control protocol, transmission control protocol
TCP is a streaming protocol
Three handshake, four waves:
Three handshake to establish a connection
<
Day – 85 Reptile (Part 2: Selenium)
crawler 03 selenium module summary One: installation and use of selenium module< /span>
01: Introduction to selenium
What is selenium? Selenium is a third-party library of Python. The interf