1. Through the declare and typeset commands
2, declare parameters are as follows
3. Example: p> Example 1: Declare as immutable, declare -r
$ var=hello
$ var=world
$ e
Category: OS
Operating System (Operating System, referred to as OS) is a computer program that manages and controls computer hardware and software resources. It is the most basic system software that runs directly on the “bare metal”. Any other software must be supported by the operating system to run .
Regular expression – how to search for words or plural versions [copy]
See the English answer> Regex search and replace with optional plural 4
I am trying to make a simple regular expression, what I want to do is to match the strange part of a word, Whether it has an
Regular expression – how to modify IP: PORT regular expressions?
I have normal expressions
match = re.findall(r'[0-9]+(? :\.[0-9]+){3}’, source) It can get content similar to 192.168.1.1 from the source string.
How do I modify this regular expression to ma
Examples of using shells to process and send mail
Implementing functions
1. Obsolete processing
Call and execute php in a shell script. If php cannot be completed within 300 seconds, The execution ends
2. Email sending
Send
Detailed DECLARE Method
shell array and declare usage Usage description The declare command is a built-in command of bash, which can be used to declare shell variables and set the attributes of variables (Declare va
MATPLOTLIB supports Chinese (Windows + Linux)
Windows supports Chinese: Install Chinese fonts—Configure in the code–Chinese can be displayed
Font download: https://pan.baidu.com/s/13IXLXm1gE4UIRtG31pVM6w Extract code :u5cy
# Sup
Regular expression – delete comments using Perl
Is there any regular expression that can remove all comments in a given C program // and / ** / var from perl?
Given a multi-line program, it should use regular expressions to remove comments
Shell script prints rectangles
Shell script printing rectangle #!/bin/bash
for ((i=1;i<= 9;i++)) do for ((j=1;j<=9;j++)) do echo -n "*" done echo done
#!/bin/bash
for ((i=1;i<= 9;i++)) do for ((j=1;j<=9;j++)) do echo -n "*" done echo done
WeChat payment interface docking document
Create a sub-package demo, create a controller package, domain package, and service package in the demo Directory structure:
xmlns:xsi=”http://www.w3.org/2001/XMLSchema-instance” xsi:sche
Regular expressions for combining numbers
I have a series of numbers as follows. I want to combine the numbers into 4 groups. Can someone give vim regular expressions?
Input: 1234 56 7890 1234
The output should be: 1234 5678 90