3. Text processing three swordsmen
The grep command mainly filters the (regular expression) lines of text based on patternssed: stream editor, text editing toolawk: implementation gawk on Linux, text report generator
3.1 grep of three swordsmen in text processing
grep: Global search REgular expression and Print out the line
Function: a text ...
Posted on Thu, 14 Oct 2021 19:50:43 -0400 by Neotropic
12, Regular expression
1. Introduction to regular expressions
Regular expressions are a form of text pattern matching, including ordinary characters (for example, letters between a and z) and special characters (called "metacharacters"). It is a pattern of string matching, which can be used to check whether a string contains a subst ...
Posted on Tue, 28 Sep 2021 06:47:08 -0400 by rross46
SHELL script - text three swordsman
optiondescribesupplement-EExtended regular (ERE)–extended–regexp-PBuilt in regularPerl-iignore case–ignore–case-nPrint line number–line–number-oPrint only matching content–only–matching-cPrint only the number of lines that match each file–count-BPrint the first few lines that match–befo ...
Posted on Mon, 20 Sep 2021 20:54:24 -0400 by dapuxter
1. sed concept
sed is a stream editor that edits a stream based on a set of pre-provided rules before the editor processes the data. The sed editor can process data in a data stream based on commands that are either entered from the command line or stored in a command text file.
2. sed's Workflow
sed's workflow mainly consist ...
Posted on Tue, 14 Sep 2021 12:09:42 -0400 by varun8211
Understand the role of regular expressions
Master the use of regular expressions
Create regular expressions
Regular expression composition Boundary character Character class Regular test
Regular expression overview
1. What is a regular expression
Regular Expression is a pattern used to match character combinations in a string. In ...
Posted on Sun, 05 Sep 2021 02:55:54 -0400 by moneytree