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sed & awk [NOOK Book]

Overview

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 ...

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sed & awk

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Overview

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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Product Details

  • ISBN-13: 9781449396602
  • Publisher: O'Reilly Media, Incorporated
  • Publication date: 3/1/1997
  • Series: Nutshell Handbooks
  • Sold by: Barnes & Noble
  • Format: eBook
  • Edition number: 2
  • Pages: 434
  • Sales rank: 387,602
  • File size: 3 MB

Customer Reviews

Average Rating 4.5
( 40 )
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See All Sort by: Showing 1 – 20 of 40 Customer Reviews
  • Anonymous

    Posted June 25, 2012

    Barksripe

    "Thank you" the tabby warrior says as he heads towards the warriors den.

    1 out of 1 people found this review helpful.

    Was this review helpful? Yes  No   Report this review
  • Anonymous

    Posted July 6, 2014

    A border collie

    She raced in.

    Was this review helpful? Yes  No   Report this review
  • Anonymous

    Posted July 6, 2014

    Sable

    But you stand here for a reason.

    Was this review helpful? Yes  No   Report this review
  • Anonymous

    Posted July 6, 2014

    Hope

    "Do we look like them? I think I have two eyes. Not one."

    Was this review helpful? Yes  No   Report this review
  • Anonymous

    Posted July 6, 2014

    Jinx

    Yawneses.

    Was this review helpful? Yes  No   Report this review
  • Anonymous

    Posted July 6, 2014

    Zach to hope

    Theres a cyclops ahead. Problaby 305 millinea old heading this way.

    Was this review helpful? Yes  No   Report this review
  • Anonymous

    Posted July 6, 2014

    To all!

    Move to 'borgias'! Asher is locked out!

    Was this review helpful? Yes  No   Report this review
  • Anonymous

    Posted July 5, 2014

    Asher

    "Pfff did you actually think I would keep you?" I blink innocently, "Aaaaanyway, make yourself at home. Or not. Idc" I shrug and walk over to the tables, sitting down and taking a gulp of my protein-enriched fruit smoothie

    Was this review helpful? Yes  No   Report this review
  • Anonymous

    Posted July 5, 2014

    The giant squid

    The giant squid flew off to the sign that says "WELCOME TO CAMP HALF BLOOD" And flew to her baby squids in the middle of the hill, "MY BABIES IVE MISSED YOU SO MUCH, IVE CAME ACROSS THE CAMPS AND WOODS TO GET TO YOU GUYS" as the baby squids roared at her mama happy with joy, the mama squid sat with her babies on the middle of the "welcome to camp half blood" sign hill, as they all roared loudly with joy.

    Was this review helpful? Yes  No   Report this review
  • Anonymous

    Posted July 6, 2014

    Marlin

    He yawned and decided to call it a night. He went to the Apollo Cabin to get some sleep. ((Gtgtb bbt))

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  • Anonymous

    Posted July 5, 2014

    Red

    -.-

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  • Anonymous

    Posted July 6, 2014

    Um......

    Asher is locked out. Move to borgias sometime soon.

    Was this review helpful? Yes  No   Report this review
  • Anonymous

    Posted July 6, 2014

    Leon

    He finished off the last cyclops, pulling a splinter from his arm, and sheathed his sword. He walked over to the group.p, staying in the shadows.

    Was this review helpful? Yes  No   Report this review
  • Anonymous

    Posted July 6, 2014

    Herb

    He leaned against a nearby tree, calmly breathing. He tiredly twirled his dagger, the tip of the blade gently pushing into his left hand. <p>

    [Do we move now? And if so, someone needs to go post their post first, because my results are different and I don't know where main camp there is.]

    Was this review helpful? Yes  No   Report this review
  • Anonymous

    Posted July 6, 2014

    Sara TO ALL: PLEASE READ

    [Guys, Asher really is locked out. That's why he hasn't been posting. In fact, in another RP, he told me so...Move to 'borgias' result one for Main Camp. I've already posted there. Res two is bios, etc. Jasmine, someone else has posted the rules and landmarks for you. Now I have to make a cabin...which is always forgotten...-_-]

    Was this review helpful? Yes  No   Report this review
  • Anonymous

    Posted July 5, 2014

    AnnaSophia

    (He just told me to tell y'all that.)

    Was this review helpful? Yes  No   Report this review
  • Anonymous

    Posted July 5, 2014

    Heather

    "Um, I need to go to bed. Good night" she said, still with a grin on her face. She waved goodnight to him and everyone else, and started walking to her cabin.
    ((Gtgtb. Goodnight everyone!))

    Was this review helpful? Yes  No   Report this review
  • Anonymous

    Posted April 26, 2013

    Good Book

    Does what it says helps you learn sed and awk. Also helps you learn regualr expressioins

    Was this review helpful? Yes  No   Report this review
  • Anonymous

    Posted November 19, 2012

    Hello Maplestar

    Can i please join Treeclan
    My name is maplestream but if maplestar i can be oaktail and i want to be a med cat or med cat apprentice
    PLEASE answer
    Reply to maplestream
    P.S reply in mistystars omen

    0 out of 1 people found this review helpful.

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  • Anonymous

    Posted July 30, 2012

    Woodpasays screw this stupid clan i wil find abetter one

    Screw this stupid clan i will find a brtter onw

    0 out of 1 people found this review helpful.

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