Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: sed newbie scripting assistance
Top Forums Shell Programming and Scripting sed newbie scripting assistance Post 302686019 by agama on Monday 13th of August 2012 09:55:01 PM
Old 08-13-2012
It's not trying to load the whole file in memory. It caches one copy of the first bits of a new line (things up to "fruit") and the list of 'items' that follow. When the first bits change, the record, with the summary of items, is written and the caching/list starts anew (list = ""). So, the only significant amount of "stuff" that is ever held in memory is the list of items.


Now, if that list is huge, then the programme could be amended to write them out as it finds them. My assumption was that the list wasn't going to be more than 1 or 2 K.

---------- Post updated at 21:55 ---------- Previous update was at 21:42 ----------

Turns out that printing the list as we go is a simpler programme; just didn't see it that way the other night.


Code:
awk '
    {
        x = $0;
        sub( "fruit.*", "", x );
        gsub( ".*fruit ", "", $0 );
         if( x != last )       # if first bits are different, print newline (if needed) and the current line
            printf( "%s%sfruit %s", NR > 1 ? "\n" : "", x, $0 );
         else         # first bits are the same, print just what is after fruit
            printf( "%s%s", NR > 1 ? ", " : "", $0 );
        last = x;
    }
     END { printf( "\n" );  }     # must have final newline
' input-file

 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Scripting Newbie

Seems simple but I am having difficulty with this one: I am trying to write a single command line argument (which will be a path) - the program should print out the owner of the path. I can not get anything I write to run. Please help. (5 Replies)
Discussion started by: Kymmers7
5 Replies

2. Shell Programming and Scripting

scripting newbie... some help please?

hi all, i am just getting in to bash scripting, so don't be too harsh... i've created this little backup script, and it's just awfull... ugly, doesn't work like I want it to, the works. anyways, i was hoping some of you might help me improve it and learn a little in the process. what i... (13 Replies)
Discussion started by: jmd9qs
13 Replies

3. Shell Programming and Scripting

Scripting neophyte needs file manipulation assistance

I need to write two shell scripts for an rsync backup solution. The first script will copy all backed up files into a folder named after the original folder, plus a date stamp (so e.g. if the original folder name is 'foo' and is backed up on the 10th of September, then the backup folder will be... (0 Replies)
Discussion started by: LambdaCalculus
0 Replies

4. Shell Programming and Scripting

Assistance in Perl scripting

PFA file "color.txt". Note : There is no newline character in the file. I have manually inserted the newline char to make it easy to understand. I am expecting out in the form as specified in second file "out.txt" I need a perl script to perform the task. Thanks in advance. (2 Replies)
Discussion started by: deo_kaustubh
2 Replies

5. Shell Programming and Scripting

Need assistance with sed

Hi All, I need your assistance, I would like to replace all lines beginning with the word "begin" with the below text: Device | IPMB0-A | IPMB0-B Board Address |Sent SentErr %Errr |Sent SentErr ... (9 Replies)
Discussion started by: Dendany83
9 Replies

6. UNIX for Advanced & Expert Users

Need assistance with sed

Hi All, I need your assistance, I would like to replace all lines beginning with the word "begin" with the below text: Device | IPMB0-A | IPMB0-B Board Address |Sent SentErr %Errr |Sent SentErr ... (10 Replies)
Discussion started by: Dendany83
10 Replies

7. Shell Programming and Scripting

Using ii for irc chat - scripting assistance?

I am using ii for irc on my pogoplug... hxxp://hg.suckless.org/ii/file/d163c8917af7/FAQ If you look at the bottom of there, it states 31 What other fancy stuff can I do with ii? 32 ---------------------------------------- 33 It is very easy to write irc bots in ii: 34... (3 Replies)
Discussion started by: spartan2006
3 Replies

8. Shell Programming and Scripting

Dhcp.config file scripting assistance

Hello everyone! I am brand new at this forum thing and wanted to thank all of you for your time and help in advance for helping me troubleshoot my issue. I am fairly new to shell scripting and scoured the entire internet to find a solution for my issue to no avail and hope you're able to help. ... (2 Replies)
Discussion started by: sedrocks
2 Replies

9. Shell Programming and Scripting

Noob to scripting needs some assistance

Hello, I am in a Unix class and have been out of town. I have been tasked to generate a couple of scripts and ahve never done it before. I have a virtual machine running Ubuntu. The task is below Prompt the system administrator for all valid input parameters Generate a menu to ask which... (1 Reply)
Discussion started by: jkeeton81
1 Replies

10. Shell Programming and Scripting

sed assistance

Hello everyone. I am trying to replace sprintf(buffer, "{\"id\":1,\"method\":\"mining.update_block\",\"params\":}\n", coinid, blockhash); with sprintf(buffer, "{\"id\":1,\"method\":\"mining.update_block\",\"params\":}\n", coinid, blockhash); this is the code I was trying but is... (9 Replies)
Discussion started by: crombiecrunch
9 Replies

LEARN ABOUT CENTOS

abrtd

ABRTD(8)							    ABRT Manual 							  ABRTD(8)

NAME

       abrtd - automated bug reporting tool's daemon.

SYNOPSIS

       abrtd [-dsv[v]...]

DESCRIPTION

       abrtd is a daemon that watches for application crashes. When a crash occurs, it collects the problem data (core file, application's command
       line etc.) and takes action according to the type of application that crashed and according to the configuration in the abrt.conf config
       file. There are plugins for various actions: for example to report the crash to Bugzilla, to mail the report, or to transfer the report via
       FTP or SCP. See the manual pages for the respective plugins.

OPTIONS

       -v
	   Log more detailed debugging information.

       -d
	   Stay in the foreground and log to standard error.

       -s
	   Log to system log even with option -d.

       -t NUM
	   Exit after NUM seconds of inactivity.

       -p
	   Add program names to log.

CAVEATS

       When you use some other crash-catching tool specific for an application or an application type (for example BugBuddy for GNOME
       applications), crashes of this type will be handled by that tool and not by abrtd. If you want abrtd to handle these crashes, turn off the
       higher-level crash-catching tool.

AUTHORS

       o   ABRT team

SEE ALSO

       abrt.conf(5)

abrt 2.1.11							    06/18/2014								  ABRTD(8)
All times are GMT -4. The time now is 02:10 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy