Learning and Practicing This article describes commands related to text processing in Shell programming, such as grep, sed, and awk grep: <span>grep is a text search tool used to search for lines in files that match one or more regular expressions.</span> <span>It is fast, flexible, and the standard tool for text searching.</span> <span>grep supports various … Read more
(Click the public account above to quickly follow) Source: ggjucheng Link: http://www.cnblogs.com/ggjucheng/archive/2013/01/13/2858470.html Introduction Awk is a powerful text analysis tool. Compared to grep for searching and sed for editing, awk is particularly powerful in data analysis and report generation. In simple terms, awk reads files line by line, slicing each line using space as the … Read more
(Click the public account above to quickly follow) Source: ggjucheng Link: http://www.cnblogs.com/ggjucheng/archive/2013/01/13/2858470.html Introduction awk is a powerful text analysis tool. Compared to grep for searching and sed for editing, awk is particularly powerful in data analysis and report generation. In simple terms, awk reads files line by line, slicing each line using space as the … Read more
1. Overview of AWK Basics # Basic Structure awk 'BEGIN{preprocessing} {line processing} END{postprocessing}' filename # Common Variables NR: line number | NF: number of fields | $0: entire line content | $1: first column 2. High-Frequency Practical Scenarios 1. Data Deduplication Example: Retaining Unique Lines # Deduplicate entire lines (keep the first occurrence) awk '!seen[$0]++' … Read more
Regular Expressions Basic regular expression ( ^, s, ., [], *) metacharacters Linux regular expressions are tools used for processing large amounts of strings, defining a set of rules and methods to match specific text patterns. Regular expressions consist of ordinary characters (such as letters a to z) and special characters (also known as metacharacters) … Read more
In the fiercely competitive global market for mobile, consumer, and automotive electronic systems, low power consumption, high performance, and high reliability are critical factors for product success. To manage these conflicting demands, design teams need to consider a variety of options comprehensively, such as adopting advanced process technology nodes, particularly FinFET-based devices. These advanced technology … Read more