1. What is GCD?
The full name is Grand Central Dispatch
Pure C language provides many powerful functions
2. Advantages of GCD
GCD is Apple's solution for multi-core parallel computing
GCD will automatically utilize more CPU cores (such as dual core and quad core)
GCD automatical ...
Added by anushka on Sat, 13 Jun 2020 10:46:25 +0300
List is the most frequently used data type in Python. List can complete the data structure implementation of most collection classes.The list is identified with "". python is the most common composite data type, which supports characters, numbers, strings and even lists (so-called nesting).The value division in the list ...
Added by Tatara on Sun, 31 May 2020 15:02:17 +0300
Note the following points when removing comments in the code
First, comments have multiple or single line comments from "/ *" to "* /"
Second, there is a single line comment of "/ /"
Also note that characters in double and single quotation marks are not included in comments
So I designe ...
Added by PHPeter on Thu, 21 May 2020 17:44:02 +0300
Compared with other programming languages, Python has more diversified operation types.
In particular, the asterisk (*), which is a widely used operator in Python, is not only used in the multiplication of two numbers. In this article, we will discuss the various uses of asterisks.
The application scenarios of four kinds of asterisks are su ...
Added by hours12 on Mon, 13 Apr 2020 13:06:12 +0300
Match string begins, Match object is returned successfully, None is returned unsuccessfully, only one is matched.
searchSearching in a string (not limited to the beginning), returning the Match object successfully, and returning None failed, matching only one.
Find all grou ...
I created a database, such as'mydb'.
CREATE DATABASE mydb CHARACTER SET utf8 COLLATE utf8_bin;
CREATE USER 'myuser'@'%' IDENTIFIED BY PASSWORD '*HASH';
GRANT ALL ON mydb.* TO 'myuser'@'%';
GRANT ALL ON mydb TO 'myuser'@'%';
GRANT CREATE ON mydb TO 'myuser'@'%';
Now I can log in to the database from anywhere, but I can't ...
Added by doforumda on Sun, 05 Jan 2020 23:38:02 +0200
By default, Python 3 source files are encoded in UTF-8, and all strings are unicode strings.
Identifier: The first character must be an alphabet or underscore. The other parts are composed of letters, numbers and underscores. They are ...
Added by vandalite on Fri, 23 Aug 2019 10:19:18 +0300
There are three functions of Iterator: one is to provide a unified and simple access interface for various data structures; the other is to enable members of the data structure to be arranged in a certain order; the third is that ES6 creates a new traversal command for...of lo ...
Added by gmartin1215 on Fri, 26 Jul 2019 11:20:51 +0300
RabbitMQ was actually the first MQ framework that I came into contact with. I remember that I went to the library to see it by myself when I was in college. Since the English of RabbitMQ website was not too difficult, it was also learned by referencing the website. There were six chapters, which were developed by Node at that time, a ...
Added by !Mikey on Fri, 17 May 2019 20:00:04 +0300