There is probably more to this than you are saying, but this will do what you are asking for.
Read up on backreferences in regular expressions if this seems somehow magical.
This is Perl s/// syntax; sed wants backslashes in different places. (On the other hand, Perl prefers $1 over \1 on the substitution side. If you "use strict" it will complain about this.)
Could someone tell me the single character wildcard for SED?
I have the file below:
$ more input2
AAA /A/B/C BBB /D/E/F
CCC /G/H/I DDD
I want to remove all strings which contain forward slashs "/" to get the below:
AAA BBB
CCC
I tried to do it in SED by the command below but I... (8 Replies)
Hi,
Here is what I want to do
I want to search local directory and its sub directory, all the files which contain any string like _12345, then remove this string.
String is a combination of _ plus a random integer number.
For example, here is one line in a file before
<properties... (1 Reply)
Hi
I would like to batch delete the "note" entry from bib files. The start would be defined by "note ={" and the end by "}." (see example bib entry below).
I tried the following command which does not have any effect:
cat input.bib| sed -e 's/note = {.*}.//' > output.bib
Any help would... (2 Replies)
I have a number of strings that I want to remove:
<b>Task: 100</b>
<b>Task: 1100 </b>
<b>Task: 2200 </b>
But the numbers in them can vary from 4, 5 8, digits in length. But, no alpha chars.
I tried this:
sed '/Task:/,//d' $file > tmpfile ; mv tmpfile $file
But it removed additional text on... (5 Replies)
Hello,
I am fairly new to Linux in general and I am trying to use SED to make some replacements in a file. Below is sample of what the file is like.
<Grouping id="024"><Source>ABC</Source><GroupingKey>000000000816</GroupingKey></Grouping><Grouping... (9 Replies)
Hello,
I apologize for asking what is probably a simple question but I have been unable to understand the other posts on the topic. I have a file that has the following several lines:
ABC DEF GH:IJKLMNOP_QRS_TUV_11112012_ABCL5
ABC DEF GH:IJKLMNOP_QRS_TUV_11112013_ABCL4
ABC DEF... (4 Replies)
Hi Folks,
I had a requirement to replace a pattern a.*a with 'a' alone. I'm writing a sed command to do that. But I'm not able to work this out. Pls help me.
echo 'a123a456a789' | sed 's/a.*a/a/'
Expected o/p : a456a789
But actual o/p is a789. :confused:
how can write that... (6 Replies)
I'm trying to use Larry Wall's rename (prename) tool to rename multiple files:
$ ls -1
blar.m4mp3
BLAH.mpmp3
bar foo.m4mp3
foo bar.mpmp3
I'm trying to fix the extensions so they're all .mp3:
rename 's/m?mp3/mp3/' *mp3
I expect m?mp3 to match the extensions,... (3 Replies)
Hello,
I have some data that looks like the following,
> <SALTDATA> (OVS0199262)
HCl
> <IDNUMBER> (OVS0199262)
OVS0199262
> <SUPPLIER> (OVS0199262)
TimTec
> <EMAIL> (OVS0199262)
info@timtec.net
> <WEBSITE> (OVS0199262)
http://www.timtec.net
I need to remove the data in... (3 Replies)
Discussion started by: LMHmedchem
3 Replies
LEARN ABOUT OPENDARWIN
subst
subst(n) Tcl Built-In Commands subst(n)
__________________________________________________________________________________________________________________________________________________NAME
subst - Perform backslash, command, and variable substitutions
SYNOPSIS
subst ?-nobackslashes? ?-nocommands? ?-novariables? string
_________________________________________________________________DESCRIPTION
This command performs variable substitutions, command substitutions, and backslash substitutions on its string argument and returns the
fully-substituted result. The substitutions are performed in exactly the same way as for Tcl commands. As a result, the string argument
is actually substituted twice, once by the Tcl parser in the usual fashion for Tcl commands, and again by the subst command.
If any of the -nobackslashes, -nocommands, or -novariables are specified, then the corresponding substitutions are not performed. For
example, if -nocommands is specified, command substitution is not performed: open and close brackets are treated as ordinary characters
with no special interpretation.
Note that the substitution of one kind can include substitution of other kinds. For example, even when the -novariables option is speci- |
fied, command substitution is performed without restriction. This means that any variable substitution necessary to complete the command |
substitution will still take place. Likewise, any command substitution necessary to complete a variable substitution will take place, even |
when -nocommands is specified. See the EXAMPLES below. |
If an error occurs during substitution, then subst will return that error. If a break exception occurs during command or variable substi- |
tution, the result of the whole substitution will be the string (as substituted) up to the start of the substitution that raised the excep- |
tion. If a continue exception occurs during the evaluation of a command or variable substitution, an empty string will be substituted for |
that entire command or variable substitution (as long as it is well-formed Tcl.) If a return exception occurs, or any other return code is |
returned during command or variable substitution, then the returned value is substituted for that substitution. See the EXAMPLES below. |
In this way, all exceptional return codes are ``caught'' by subst. The subst command itself will either return an error, or will complete |
successfully.
EXAMPLES
When it performs its substitutions, subst does not give any special treatment to double quotes or curly braces (except within command sub-
stitutions) so the script
set a 44
subst {xyz {$a}}
returns ``xyz {44}'', not ``xyz {$a}'' and the script |
set a "p} q {r" |
subst {xyz {$a}} |
return ``xyz {p} q {r}'', not ``xyz {p} q {r}''. |
When command substitution is performed, it includes any variable substitution necessary to evaluate the script. |
set a 44 |
subst -novariables {$a [format $a]} |
returns ``$a 44'', not ``$a $a''. Similarly, when variable substitution is performed, it includes any command substitution necessary to |
retrieve the value of the variable. |
proc b {} {return c} |
array set a {c c [b] tricky} |
subst -nocommands {[b] $a([b])} |
returns ``[b] c'', not ``[b] tricky''. |
The continue and break exceptions allow command substitutions to prevent substitution of the rest of the command substitution and the rest |
of string respectively, giving script authors more options when processing text using subst. For example, the script |
subst {abc,[break],def} |
returns ``abc,'', not ``abc,,def'' and the script |
subst {abc,[continue;expr 1+2],def} |
returns ``abc,,def'', not ``abc,3,def''. |
Other exceptional return codes substitute the returned value |
subst {abc,[return foo;expr 1+2],def} |
returns ``abc,foo,def'', not ``abc,3,def'' and |
subst {abc,[return -code 10 foo;expr 1+2],def} |
also returns ``abc,foo,def'', not ``abc,3,def''.
SEE ALSO
Tcl(n), eval(n), break(n), continue(n)
KEYWORDS
backslash substitution, command substitution, variable substitution
Tcl 7.4 subst(n)