Sponsored Content
Full Discussion: extract a field by logic
Top Forums UNIX for Dummies Questions & Answers extract a field by logic Post 302280717 by ChicagoBlues on Tuesday 27th of January 2009 12:42:53 PM
Old 01-27-2009
extract a field by logic

below are the contents of file 'tmp.out':

2|34|534|
1|355|54|
1|443|34|
3|43|768|
3|7|887|
1|9|990|

How do I extract the 2nd and 3rd columns of file 'tmp.out' only when the first column equals '1'.

Note that this file will be huge; atleast 5million+ rows, so I want to avoid looping over this file.

Thanks,

- CB
 

7 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

logic needed to extract lines

Hi All, Are there any logic to extract the only lines between first two *TM* (which is marked in blue)? VOL1HST99 0 HDR1A999999S 999999HST99 HDR2F001200012001 UHL1 0729609000001 000000 *TM*^^^^^^^^^^^^^^^^^^^^^^ 01012610252171017301805000... (2 Replies)
Discussion started by: ganapati
2 Replies

2. Shell Programming and Scripting

how to extract last occurence of the field

path = /first/second/third/fourth. i want to extract /first/second/third from path.my program something like this .... path=/first/second/third/fourth noc=`echo $path|tr '/' '\n'|wc -w` var='echo $noc|cut -d'/' -f 1-$noc --> is giving error. why $noc is not working here.any other... (3 Replies)
Discussion started by: kcp_pavan
3 Replies

3. UNIX Desktop Questions & Answers

Extract third field of third line

Hi, how do I extract the third field of the first line? I know how to get the first line or the third field of a file, but I can't get the single entry. awk 'NR==1' file.txt awk '{print $3}' file.txt Please tell me how to combine these. And how do I set this value into a variable? ... (1 Reply)
Discussion started by: etownbetty
1 Replies

4. UNIX for Dummies Questions & Answers

Extract a certain field from a CSV?

EDIT: This problem has been solved thanks to the help of scottn. Okay, so I have a CSV. Let's say it has the following entries in it: Jackie Chan,1954,M Chuck Norris,1930,M Bruce Lee,1940,M How would I, for example, extract the gender out of a certain person, maybe based on the year of... (12 Replies)
Discussion started by: chickeneaterguy
12 Replies

5. Shell Programming and Scripting

Extract Field from a file

I have an input file with content like : 18:51:18 | 217863|Acct 0110855565|RC 17608| 16 Subs| 1596 UsgRecs| 2 Secs| 430 CPUms| prmis2:26213 <MoveUsage d aemon needs to run on this account before it can be billed.> 23:03:30 | 896529|Acct 2063947620|RC 17608| 8 Subs| 148 UsgRecs| ... (9 Replies)
Discussion started by: Rajesh Putnala
9 Replies

6. Shell Programming and Scripting

Extract lines whose third field is 0

Hi, I have a file with colon separated values like below. How can i get those lines whose third field is 0 (zero). In the below example, lines starting with stapler and tempo has its third field as 0 $ cat list.txt galaxy:b:5:world stapler:a:0:hello abc:a:4:stomper kepler:uic:5:jam... (8 Replies)
Discussion started by: John K
8 Replies

7. UNIX for Dummies Questions & Answers

Ps output field extract

This is the output from ps -ef cmd . I have to extract the fourth (C) and the seventh (TIME) field root 3932344 3801216 Apr 08 - 0:00 /usr/sbin/rsct/bin/ERrmd root 3997836 1 0 Apr 08 - 0:00 /usr/sbin/uprintfd root 4128894 3801216 0 Apr 08 - 0:09... (3 Replies)
Discussion started by: Anu_1
3 Replies
PHAR.EXTRACTTO(3)							 1							 PHAR.EXTRACTTO(3)

Phar::extractTo - Extract the contents of a phar archive to a directory

SYNOPSIS
public bool Phar::extractTo (string $pathto, [string|array $files], [bool $overwrite = false]) DESCRIPTION
Note This method requires the php.ini setting phar.readonly to be set to 0 in order to work for Phar objects. Otherwise, a PharException will be thrown. Extract all files within a phar archive to disk. Extracted files and directories preserve permissions as stored in the archive. The optional parameters allow optional control over which files are extracted, and whether existing files on disk can be overwritten. The sec- ond parameter files can be either the name of a file or directory to extract, or an array of names of files and directories to extract. By default, this method will not overwrite existing files, the third parameter can be set to true to enable overwriting of files. This method is similar to ZipArchive.extractTo(3). PARAMETERS
o $pathto - Path within an archive to the file to delete. o $files - The name of a file or directory to extract, or an array of files/directories to extract o $overwrite - Set to TRUE to enable overwriting existing files RETURN VALUES
returns TRUE on success, but it is better to check for thrown exception, and assume success if none is thrown. ERRORS
/EXCEPTIONS Throws PharException if errors occur while flushing changes to disk. EXAMPLES
Example #1 A Phar.extractTo(3) example <?php try { $phar = new Phar('myphar.phar'); $phar->extractTo('/full/path'); // extract all files $phar->extractTo('/another/path', 'file.txt'); // extract only file.txt $phar->extractTo('/this/path', array('file1.txt', 'file2.txt')); // extract 2 files only $phar->extractTo('/third/path', null, true); // extract all files, and overwrite } catch (Exception $e) { // handle errors } ?> SEE ALSO
PharData.extractTo(3). PHP Documentation Group PHAR.EXTRACTTO(3)
All times are GMT -4. The time now is 03:06 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy