Title
sed & awk: UNIX Power Tools,New
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sed & awk describes two text processing programs that are mainstays of the UNIX programmer's toolbox. sed is a 'stream editor' for editing streams of text that might be too large to edit as a single file, or that might be generated on the fly as part of a larger data processing step. The most common operation done with sed is substitution, replacing one block of text with another. awk is a complete programming language. Unlike many conventional languages, awk is 'data driven' you specify what kind of data you are interested in and the operations to be performed when that data is found. awk does many things for you, including automatically opening and closing data files, reading records, breaking the records up into fields, and counting the records. While awk provides the features of most conventional programming languages, it also includes some unconventional features, such as extended regular expression matching and associative arrays. sed & awk describes both programs in detail and includes a chapter of example sed and awk scripts. This edition covers features of sed and awk that are mandated by the POSIX standard. This most notably affects awk, where POSIX standardized a new variable, CONVFMT, and new functions, toupper() and tolower(). The CONVFMT variable specifies the conversion format to use when converting numbers to strings (awk used to use OFMT for this purpose). The toupper() and tolower() functions each take a (presumably mixed case) string argument and return a new version of the string with all letters translated to the corresponding case. In addition, this edition covers GNU sed, newly available since the first edition. It also updates the first edition coverage of Bell Labs nawk and GNU awk (gawk), covers mawk, an additional freely available implementation of awk, and briefly discusses three commercial versions of awk, MKS awk, Thompson Automation awk (tawk), and Videosoft (VSAwk).
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Shipping & Returns
Shipping
We ship your order within 2–3 business days for USA deliveries and 5–8 business days for international shipments. Once your package has been dispatched from our warehouse, you'll receive an email confirmation with a tracking number, allowing you to track the status of your delivery.
Returns
To facilitate a smooth return process, a Return Authorization (RA) Number is required for all returns. Returns without a valid RA number will be declined and may incur additional fees. You can request an RA number within 15 days of the original delivery date. For more details, please refer to our Return & Refund Policy page.
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Warranty
We provide a 2-year limited warranty, from the date of purchase for all our products.
If you believe you have received a defective product, or are experiencing any problems with your product, please contact us.
This warranty strictly does not cover damages that arose from negligence, misuse, wear and tear, or not in accordance with product instructions (dropping the product, etc.).
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Frequently Asked Questions
- Q: What is the main focus of the book 'sed & awk (Nutshell Handbooks)'? A: The book primarily focuses on two text processing programs, sed and awk, which are essential tools for UNIX programmers. It provides detailed descriptions, usage examples, and features of both programs.
- Q: Who is the author of 'sed & awk (Nutshell Handbooks)'? A: The author of the book is Dale Dougherty.
- Q: What is the publication date of this edition of 'sed & awk'? A: This edition was published on April 8, 1997.
- Q: Is 'sed & awk (Nutshell Handbooks)' suitable for beginners? A: Yes, the book is suitable for beginners as it includes detailed explanations and examples that help readers understand how to use sed and awk effectively.
- Q: What are some key features of sed as described in the book? A: The book explains that sed is a stream editor used for editing large streams of text, with the most common operation being substitution of text blocks.
- Q: What programming language is introduced in this book alongside sed? A: The book introduces awk, which is a complete programming language that is data-driven and automates many data processing tasks.
- Q: Does the book cover POSIX standards for awk? A: Yes, the book discusses features of awk that are mandated by the POSIX standard, including the CONVFMT variable and new functions like toupper() and tolower().
- Q: What type of condition is 'sed & awk (Nutshell Handbooks)' in? A: The book is listed as 'New' condition.
- Q: How many pages does 'sed & awk (Nutshell Handbooks)' have? A: The book contains 432 pages.
- Q: What is the binding type of 'sed & awk (Nutshell Handbooks)'? A: The book is available in paperback binding.