Sponsored Content
Operating Systems Linux Fedora Help with controlling string elements Post 302504229 by mirni on Monday 14th of March 2011 05:12:36 AM
Old 03-14-2011
@pawannoel:
This kind of substitution may come in handy also:
Code:
  $ var=kofoo23.txt
 $ echo ${var/foo/bar}
kobar23.txt

Can also be done with nested vars:
Code:
  $ str=BAR
  $ echo ${var/foo/$str}
koBAR23.txt

For details look at 'man bash' , and search for 'parameter expansion'

@ctsgnb:
Which shell (and version) are you using? I can't seem to find the
echo ${a##?}
echo ${a#?}
expansions in 'man bash' on my system (GNU bash, version 4.1.5(1)-release (i486-pc-linux-gnu)), although it seems to work on CL. What do these do?
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

controlling screen display

How can I control the screen output when trying to read a large file onto the screen x number of lines at a time. I'm trying to use this is a bourne shell script. I want to display 10 lines of a file, pause the screen so that a user can read the file, and then display the next 10 lines of the file,... (6 Replies)
Discussion started by: jrdnoland1
6 Replies

2. UNIX for Dummies Questions & Answers

Controlling logfiles

I support an app that outputs alert and audit messages to one log file (vendor says they can't be separated). The script that I have written takes a copy (mv cmd) of the file to do the separation and reformatting. I have a problem that I loose records (messages are being written constantly, upto 3+... (5 Replies)
Discussion started by: nhatch
5 Replies

3. Programming

controlling terminal

What is controlling terminal in the case of daemon process? (2 Replies)
Discussion started by: Madhu Babu
2 Replies

4. Filesystems, Disks and Memory

Controlling I/O

Hi guys, Can anyone please tell me how I can control the I/O on my hardware devices in Suse Linux 8.1. I find that everytime I am reading a CD, or copying from a CD, I am unable to listen to music of watch a movie. Maybe this is intended to be like so, for the current high street technolgy... (1 Reply)
Discussion started by: bionicfysh
1 Replies

5. Shell Programming and Scripting

ps: no controlling terminal

Any one know the below means : ps: no controlling terminal I had run a script in background : nohup ./benchmark.sh & and shutdown my windows system from where i connected through SSH I am using bash: The above script perfoms various tasks of Benchmarking Repositories Today the... (3 Replies)
Discussion started by: sriram003
3 Replies

6. Shell Programming and Scripting

Search array elements as file for a matching string

I would like to find a list of files in a directory less than 2 days old and put them into an array variable. And then search for each file in the array for a matching string say "Return-code= 0". If it matches, then display the array element with a message as "OK". Your help will be greatly... (1 Reply)
Discussion started by: mkbaral
1 Replies

7. Shell Programming and Scripting

Array with String Elements

How can I get my array to understand the double-quotes I'm passing into it are to separate text strings and not part of an element? here's what I'm working with... db2 -v connect to foo db2 -x "select '\"' || stats_command || '\",' from db2law1.parallel_runstats where tabname = 'BAZ'" set... (4 Replies)
Discussion started by: djschmitt
4 Replies

8. UNIX for Dummies Questions & Answers

Help with counting string elements

Hi All, I hv several files which have hundreds of lines each for example>XYZ.abc01 NNNTCGGTNNNNNCCACACACMYACACACCCACACCCACSCARCAC I'd like to exculde the first line beginning with ">" and then for the rest of the lines get a count for each string element. So for the above example I would like... (8 Replies)
Discussion started by: pawannoel
8 Replies

9. UNIX for Dummies Questions & Answers

Help with editing string elements

Hi All I have a question. I would like to edit some string characters by replacing with characters of choice located in another file. For example in sample file>S5_SK1.chr01 NNNNNNNNNNNNNNNNNNNCAGCATGCAATAAGGTGACATAGATATACCCACACACCACACCCTAACACTAACCCTAATCTAACCCTGGCCAACCTGTTT... (9 Replies)
Discussion started by: pawannoel
9 Replies

10. Red Hat

"rhgb quiet" controlling the display of commands in single user mode ?"rhgb quiet" controlling the d

Why does removing "rhgb quiet" from the kernel boot parameters control whether or not the commands I enter are displayed in single user mode ? For instance, if I do not remove "rhgb quiet", when I am in single user mode, whatever command I type will not be displayed on the screen. The... (0 Replies)
Discussion started by: Hijanoqu
0 Replies
PARSE_STR(3)								 1							      PARSE_STR(3)

parse_str - Parses the string into variables

SYNOPSIS
void parse_str (string $str, [array &$arr]) DESCRIPTION
Parses $str as if it were the query string passed via a URL and sets variables in the current scope. Note To get the current QUERY_STRING, you may use the variable $_SERVER['QUERY_STRING']. Also, you may want to read the section on vari- ables from external sources. Note The magic_quotes_gpc setting affects the output of this function, as parse_str(3) uses the same mechanism that PHP uses to populate the $_GET, $_POST, etc. variables. PARAMETERS
o $str - The input string. o $arr - If the second parameter $arr is present, variables are stored in this variable as array elements instead. RETURN VALUES
No value is returned. EXAMPLES
Example #1 Using parse_str(3) <?php $str = "first=value&arr[]=foo+bar&arr[]=baz"; parse_str($str); echo $first; // value echo $arr[0]; // foo bar echo $arr[1]; // baz parse_str($str, $output); echo $output['first']; // value echo $output['arr'][0]; // foo bar echo $output['arr'][1]; // baz ?> SEE ALSO
parse_url(3), pathinfo(3), http_build_query(3), get_magic_quotes_gpc(3), urldecode(3). PHP Documentation Group PARSE_STR(3)
All times are GMT -4. The time now is 02:15 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy