Effective Awk Programming 4e

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Effective Awk Programming

Author : Arnold Robbins
ISBN : 9781491904978
Genre : Computers
File Size : 39.82 MB
Format : PDF, ePub
Download : 369
Read : 692

When processing text files, the awk language is ideal for handling data extraction, reporting, and data-reformatting jobs. This practical guide serves as both a reference and tutorial for POSIX-standard awk and for the GNU implementation, called gawk. This book is useful for novices and awk experts alike. In this thoroughly revised edition, author and gawk lead developer Arnold Robbins describes the awk language and gawk program in detail, shows you how to use awk and gawk for problem solving, and then dives into specific features of gawk. System administrators, programmers, webmasters, and other power users will find everything they need to know about awk and gawk. You will learn how to: Format text and use regular expressions in awk and gawk Process data using awk's operators and built-in functions Manage data relationships using associative arrays Define your own functions "Think in awk" with two full chapters of sample functions and programs Take advantage of gawk's many advanced features Debug awk programs with the gawk built-in debugger Extend gawk by writing new functions in C or C++ This book is published under the terms of the GNU Free Documentation License. You have the freedom to copy and modify this GNU manual. Royalties from the sales of this book go to the Free Software Foundation and to the author.
Category: Computers

Bash Cookbook

Author : Carl Albing
ISBN : 9781491975305
Genre : Computers
File Size : 43.15 MB
Format : PDF, Kindle
Download : 245
Read : 314

For system administrators, programmers, and end users, shell command or carefully crafted shell script can save you time and effort, or facilitate consistency and repeatability for a variety of common tasks. This cookbook provides more than 300 practical recipes for using bash, the popular Unix shell that enables you to harness and customize the power of any Unix or Linux system. Ideal for new and experienced users alike—including proficient Windows users and sysadmins—this updated second edition helps you solve a wide range of problems. You’ll learn ways to handle input/output, file manipulation, program execution, administrative tasks, and many other challenges. Each recipe includes one or more scripting examples and a discussion of why the solution works. You’ll find recipes for problems including: Standard output and input, and executing commands Shell variables, shell logic, and arithmetic Intermediate shell tools and advanced scripting Searching for files with find, locate, and slocate Working with dates and times Creating shell scripts for various end-user tasks Working with tasks that require parsing Writing secure shell scripts Configuring and customizing bash
Category: Computers

Bash Pocket Reference

Author : Arnold Robbins
ISBN : 9781491941560
Genre : Computers
File Size : 40.23 MB
Format : PDF, Docs
Download : 623
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It’s simple: if you want to interact deeply with Mac OS X, Linux, and other Unix-like systems, you need to know how to work with the Bash shell. This concise little book puts all of the essential information about Bash right at your fingertips. You’ll quickly find answers to the annoying questions that generally come up when you’re writing shell scripts: What characters do you need to quote? How do you get variable substitution to do exactly what you want? How do you use arrays? Updated for Bash version 4.4, this book has the answers to these and other problems in a format that makes browsing quick and easy. Topics include: Invoking the shell Syntax Functions and variables Arithmetic expressions Command history Programmable completion Job control Shell options Command execution Coprocesses Restricted shells Built-in commands
Category: Computers

Chromatography A Century Of Discovery 1900 2000 The Bridge To The Sciences Technology

Author :
ISBN : 0080476503
Genre : Science
File Size : 39.73 MB
Format : PDF, Kindle
Download : 575
Read : 511

Chromatography - A Century of Discovery 1900-2000 represents the combined thinking and contributions of many chromatographers. It includes several in-depth feature chapters covering the Beginnings of Chromatography, which highlights M.S. Tswett, the inventor of chromatography, and several other early pioneers. Included are the contributions of several Nobel Laureates,and 125 Chromatography Award Winners and contributors, an extensive bibliography of publications on the History of the Evolution of Chromatography; a presentation of Major International Symposia supporting chromatography and as a bridge to selected sciences. Special chapters are written by well-known Chromatographers on Support and Stationary Phases, and Separations followed by a chapter on Milestones and Paradigm Shifts in Science. New discoveries in the life sciences and medicine, agriculture, the environment and separations technology in the 21st century will rely immeasurably on the 20th century research tools in chromatography and those yet to be developed.
Category: Science