Sponsored Content
Top Forums Shell Programming and Scripting Limitations of awk? Good idea? Bad idea? Post 74266 by vgersh99 on Wednesday 8th of June 2005 05:05:19 PM
Old 06-08-2005
It's somewhat difficult to follow the thread, but.... I think I understand what you're after.

Usually you don't to store ALL the records, but rather one record per key - where the 'key' is your 'unique identifier' for the type of a record.

Awk has a notion of the 'associative arrays' - very similar to perl's hashes. You can store by a 'key', update by a 'key' and lookup by a 'key'.

You can process your CSV once, store the relative pieces of a file in the array, manipulate the array cells as you go AND post-process the content of the array in the awk's 'END' session [by iterating through the array: for( i in array)].

The associative arrays are dynamic in nature and their size is bound only by the available memory. Seems like you don't have huge files to process - you should be ok.
 

8 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Dual Boot a good idea?

I was just wondering if it would be alright to dual boot a machine with both UNIX using XTERM for the interface and windows 98 or if people consider this a bad idea? if you consider it bad do tell me some possible alternatives..also would it be better to get linux over pure unix? I'd like a visual... (8 Replies)
Discussion started by: PravusMentis
8 Replies

2. UNIX for Dummies Questions & Answers

Why is it Bad Idea to insert "." (Dot) to PATH ?

I was told that it's a Bad Idea (especially for root ) to Add To the Variable $PATH in unix the ":." (dot), In order to execute programs in my current directory without typing ./program For example: PATH=$PATH:$HOME/bin:. Does someone know why is it a Bad Idea? (2 Replies)
Discussion started by: amitbern
2 Replies

3. Shell Programming and Scripting

any good idea on this?

txt file like this, 1 2 3 4456 a bb c d 3 f e 1 k 32 d m f e 123 m 2 k every line contains 3 or more columns, all the columns are separated by space, and every column includes 1 to 3 character. what I wanna do is deleting the first three columns, and keep the rest no matter how long... (7 Replies)
Discussion started by: fedora
7 Replies

4. Shell Programming and Scripting

using case to do this might be a bad idea?

Reading this file. I want to read all 4 fields. If 2 is populated with a p, I want to set $TYPEP to "Printers", if not should be empty. If 3 is populated with an r, I want to set $TYPER to "REQ Printers" if not should be empty. If 4 is populated with letter o, I want to set $TYPEO to... (12 Replies)
Discussion started by: Skyybugg
12 Replies

5. OS X (Apple)

Deleting a recursive symbolic link was a very bad idea

Well i was tidying up some files in a very important directory on our development server and somehow some plank had put a recursive sybmolic link in it. Which I the even bigger plank tried to delete from my FTP client. My FTP client then thought it would be OK to delete not only the sybmolic link... (0 Replies)
Discussion started by: timgolding
0 Replies

6. UNIX for Advanced & Expert Users

echo 1 > /proc/sys/vm/drop_caches a good idea?

Hi folks. I work with several production servers, and I have seen in some Kernel Cache using most of the memory. See this pic: http://i51.tinypic.com/301nb6c.jpg Do you think this is a smart choice? Remember these are productions servers and it is extremely necesary this does not... (6 Replies)
Discussion started by: erick_tuk
6 Replies

7. Red Hat

Is overlapping two RAID5 arrays on same drives a bad idea ??

is placing two RAID5 arrays on disk as shown below Is advisable? Will this create performance problems? sda-(500GB) sdb-(1TB) sdc-(1TB) sdd-(1TB) (250MB)----------(250MB) ---------unused------------unused------->(/dev/md0) RAID1 ... (6 Replies)
Discussion started by: Saed
6 Replies

8. Shell Programming and Scripting

Compact script with array - Good idea?

Hi, I have a shell script where a lot of the code is repeated. I wanted to make the code much more compact so I spoke to a guy and he suggested using arrays, like follows: #!/bin/bash readonly -a nginx=('nginx' '--prefix=/opt' '-j 4' 'http://nginx.org/download/nginx-1.2.2.tar.gz' )... (2 Replies)
Discussion started by: Spadez
2 Replies
XkbKeySymEntry(3)						   XKB FUNCTIONS						 XkbKeySymEntry(3)

NAME
XkbKeySymEntry - Returns the keysym corresponding to shift level shift and group grp from the two-dimensional array of keysyms for the key corresponding to keycode SYNOPSIS
KeySym XkbKeySymEntry macro ( xkb, keycode, shift, grp ) XkbDescPtr xkb; KeyCode keycode; int shift; int grp; ARGUMENTS
- xkb Xkb description of interest - keycode keycode of interest - shift shift level of interest - grp group of interest DESCRIPTION
The key width and number of groups associated with a key are used to form a small two-dimensional array of KeySyms for a key. This array may be different sizes for different keys. The array for a single key is stored as a linear list, in row-major order. The arrays for all of the keys are stored in the syms field of the client map. There is one row for each group associated with a key and one column for each level. The index corresponding to a given group and shift level is computed as: idx = group_index * key_width + shift_level The offset field of the key_sym_map entry for a key is used to access the beginning of the array. XkbKeySymEntry returns the keysym corresponding to shift level shift and group grp from the two-dimensional array of keysyms for the key corresponding to keycode. X Version 11 libX11 1.2.1 XkbKeySymEntry(3)
All times are GMT -4. The time now is 04:30 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy