The shell script prints the nine-nine-nine multiplication table #!/bin/bash
for i in {1..9}
do
for j in {1..9}
do
if [$j -le $i]
then
echo -n “${j}X${i}= $(($i*$j)) ”
fi
done
Regular expression – how to match two values, not depending on their corresponding position in the string
I am looking for the best way to match two values at the same time.
If both values are in the string, I want to get a true value, But I don’t know the order in which they appear in the st
User mode and kernel mode (from MSDN)
A processor in a computer running Windows has two different modes: user mode and kernel mode. The processor switches between the two modes depending on what type of code is running on the processor
RPM and YUM
rpm is an open software package management system, the original full name is red hat package management
rpm -i package name install software -ivh display the installation process
rpm -e
MacOS – How to add the parameters of the OSX LaunchD PLIST to the pipe output to the log file?
I have tried many different changes, but I can’t make it work.
I have a plist file:
Regular expression is an unstressed HTML tag
Does anyone have a regular expression to match unclosed HTML tags? For example, the regular expression will match the . and the second , but not the first or first closing tag:
testing Is th
Regular expression – how to determine which alternative items in the Perl regular expression mode?
I have a list of regular expressions (about 10-15) and I need to match some text. Matching them one by one in a loop is too slow. However, I did not write my own state machine To match all regular
authority management
Linux users and user groups (authority management) user management useradd create users
-c — Specify user description -d—specify home directory, default home directory /home under the sam
Regular expression extraction part URL
I’m lazy tonight and don’t want to figure this out. I need a regular expression to match’jeremy.miller’ and’scottgu’ in the following input:
http://codebetter.com/blogs/jeremy.miller/archive/
Regular expression – Assess postal code input to Perl array
I have an array containing the first 2 characters of the postal code area in Perl, as shown below:
@acceptedPostcodes = (“CV”, “LE”, “CM”, “CB”, “EN”, “SG”, “NN”, “MK”, ”LU”, “PE”, “ST”, ”