This article is from NetEase cloud community.
Author: Zhu Rui
This article is based on Zhu Rui’s 7,000-word transcript of a shared story in the Salon, a Netease practitioner.
Good afternoon. I’m very glad to be able to talk with you about some operation today.
Today, the theme I share is called deep feeling.
The reason for choosing this theme is that we often share a variety of good activities in the circle of friends, work groups and so on, all kinds of screen H5. When you see these cases, you will analyze these cases as well as what H5 is good for. If you see it, yo...
Header file stdio.h
stdlib.h
sting.h
Learn the first three header files first.
1： stdio.h This header file contains various functions of the program interacting with external data.
To put it plainly, it is used to process input / output.
2：stdlib.h Standard library standard library header file
Contains some functions that deal with the system.
3：string.h Contains some character processing functions.
Since it is a character, the basic unit of processing...
The frequent use of C++ and the systematic learning of C have led to a sense of chaos in writing C recently.
First of all, it is not clear about what standard header files are C.
Secondly: Some functions of C belong to which header file, the principle behind this function implementation more can not be clarified
Therefore, it is necessary to relearn C systematically.
Title Description
T The company found n bugs in a software it developed and issued a batch of M patches for the software. Every patch has its own environment, and a patch can only be used if it contains some errors in the software without others. A patch inWhile eliminating certain mistakes, other mistakes are often added.
In other words, for each patch i, there are two corresponding error sets B1 [i] and B2 [i], making it possible to use patch I only if the software contains all the errors in B1 [i] and not any errors in B2 [i]. Patch I will be repairedSome errors in complex software F1[i] a...
Supplement: there is no introduction to the usage of with open in this book.
If you have a dream, you need to realize his “Python file read and write, and then use the with open statement”.
Reading and writing files is the most common IO operation. Python has built-in functions for reading and writing files, and its usage is compatible with C.
Before we read and write files, we must understand that the function of reading and writing files on disk is provided by the operating system. Modern operating systems do not allow ordinary programs to operate disk directly. So, rea...
Just take the big brothers and get it ready.
Rollen Holt 《About Python file operation “
AllenW 《PythonRead and write files
—————————————Rollen Holt—————————————
pythonThe operation of files and folders (file operation functions) involves OS modules and shutil modules.
Gets the current working directory, the directory path of the current Python script: os.getcwd ()
Returns all files and directory names in the sp...
One: plug-in storage engine
cThe terminal is connected to the s server through connectors.
Framework
SHOW ENGINES; View supported engine
SHOW table status where Engine=’InnoDB ’; Display table status information
SHOW table status\G View table status information
InnoDB Storage engine
Data are stored in table space with 2 storage formats.
1 Data and indexes of all tables of InnoDB type are stored in the same table space named ibdata1, but this approach does not support the advanced capabilities of InnoDB
2 In the configuration of asking price that...
Section 1 overview of database management system
You can see the ranking of databases in www.db-engines.com/en/ website.
The database is divided into:
Relational database:
mysql——mariaDB
oracle
Non relational database
nosql
Data management system: a more efficient data management system on disk storage mechanism.
For relational databases: Store data in tables, each table may have a correlation
Its core components: libraries, tables, indexes, views, sql, storage engines, storage functions, triggers, event schedulers
Constraints:
The p...
