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Full Discussion: Gsub function in awk
Top Forums Shell Programming and Scripting Gsub function in awk Post 302831677 by yifangt on Thursday 11th of July 2013 01:16:43 PM
Old 07-11-2013
Gsub function in awk

Hello, I had some difficulty to understand the gsub function and maybe the regex in this script to remove all the punctuations:
Code:
awk  'gsub(/[^a-zA-Z0-9_ \t]/, " ", $0)'  text.txt

File text.txt:
Code:
This is a test for gsub
I typed this random text file
which contains punctuation like ,.;!'"?/\ etc.
The script should remove all the punctuations

The output is only one line:
Code:
which contains punctuation like        etc

What did I miss with gsub or the regex? Thanks a lot!

Last edited by yifangt; 07-11-2013 at 04:32 PM..
 

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COLORS(3)						   libbash colors Library Manual						 COLORS(3)

NAME
colors -- libbash library for setting tty colors. SYNOPSIS
colorSet <color> colorReset colorPrint [<indent>] <color> <text> colorPrintN [<indent>] <color> <text> DESCRIPTION
General colors is a collection of functions that make it very easy to put colored text on tty. The function list: colorSet Sets the color of the prints to the tty to COLOR colorReset Resets current tty color back to normal colorPrint Prints TEXT in the color COLOR indented by INDENT (without adding a newline) colorPrintN The same as colorPrint, but trailing newline is added Detailed interface description follows. Available colors: Green Red Yellow White The color parameter is non-case-sensitive (i.e. RED, red, ReD, and all the other forms are valid and are the same as Red). FUNCTIONS DESCRIPTIONS
colorSet <color> Sets the current printing color to color. colorReset Resets current tty color back to normal. colorPrint [<indent>] <color> Prints text using the color color indented by indent (without adding a newline). Parameters: <indent> The column to move to before start printing. This parameter is optional. If ommitted - start output from current cursor position. <color> The color to use. <color> The text to print. colorPrintN [<indent>] <color> The same as colorPrint, except a trailing newline is added. EXAMPLES
Printing a green 'Hello World' with a newline: Using colorSet: $ colorSet green $ echo 'Hello World' $ colorReset Using colorPrint: $ colorPrint 'Hello World'; echo Using colorPrintN: $ colorPrintN 'Hello World' AUTHORS
Hai Zaar <haizaar@haizaar.com> Gil Ran <gil@ran4.net> SEE ALSO
ldbash(1), libbash(1) Linux Epoch Linux
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