12-20-2006
Yes you can do that as well. With -- you can unset the variables $1 et al. The difference appears when you want to unset the variables.
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hello
I'm using command "set" to count number of word in file .
But I don't know how to get number of lines in file using commnad "set " ?.
Please Help.
#!/bin/sh
set -- `cat $1`
echo " $# words " # wc -w $1 (4 Replies)
Discussion started by: scotty_123
4 Replies
2. Shell Programming and Scripting
i have a script in which i go to a particular dir and list all its file
------------------------------------------------------------------------
#!/bin/ksh
if test -d systemProperties
then
set --`cd systemProperties`
for i in *
do
echo "$i" >> lastm2.txt
done
fi... (2 Replies)
Discussion started by: ali560045
2 Replies
3. Shell Programming and Scripting
Hi,
I am new to unix and trying to learn shell scripting. I am using Redhat linux instead of unix and using Bash shell.
I typed some code which consist of "set" command. I got the code from a book.
The code is,
set 'who am i'
echo $name
Actually the... (3 Replies)
Discussion started by: saravanakumar
3 Replies
4. UNIX for Dummies Questions & Answers
I have heard the following command and seen people using it at shell but I don't know what it is for and when it is used. I will appreciate any comment regarding the use of this command.
set -o vi (2 Replies)
Discussion started by: agasamapetilon
2 Replies
5. Shell Programming and Scripting
hi all,
Please tell all the uses of set -x command.
Also can you tell about other options which can be used with set command.
Thanks:)
sumit (3 Replies)
Discussion started by: sumit207
3 Replies
6. Shell Programming and Scripting
Hi,
I have following scenario..
set -e
eval Command 1
eval Command 2
eval Command 3
gmake realclean
but now the problem is I want to print an error message, advising user to run gmake realclean after resolving errors if any of the Command1/2/3 failed. I know I can use trap to do... (0 Replies)
Discussion started by: Shribigb
0 Replies
7. UNIX for Dummies Questions & Answers
Hi all,
Some clarification regarding the unix set command for ksh env.
I read up the man pages, but ended up more blur. Eg.
- Turns off -x and -v flags and stops examining argu-
ments for flags.
- Does not change any of the flags. This option is
... (1 Reply)
Discussion started by: srage
1 Replies
8. HP-UX
Hi,
I am using hp unix
i want to know the use of the following commands
set --
set - variable
thanks (4 Replies)
Discussion started by: gomathi
4 Replies
9. UNIX for Dummies Questions & Answers
I'm reading about debugging aids in bash and have come across the set command. It says in my little book that an addition to typing
set
you can also use them "on the command line when running a script..." and it lists this in a small table:
set -o option Command Line... (5 Replies)
Discussion started by: Straitsfan
5 Replies
10. UNIX for Dummies Questions & Answers
Hi Guys,
I like to output every command executed in the script to a file.
I have tried set -x which does the same.
But it is not giving the logs of the child script which is being called from my script.
Is there any parameters in the Set command or someother way where i can see the log... (2 Replies)
Discussion started by: mac4rfree
2 Replies
unset(n) Tcl Built-In Commands unset(n)
__________________________________________________________________________________________________________________________________________________
NAME
unset - Delete variables
SYNOPSIS
unset ?-nocomplain? ?--? ?name name name ...?
_________________________________________________________________
DESCRIPTION
This command removes one or more variables. Each name is a variable name, specified in any of the ways acceptable to the set command. If
a name refers to an element of an array then that element is removed without affecting the rest of the array. If a name consists of an
array name with no parenthesized index, then the entire array is deleted. The unset command returns an empty string as result. If -nocom-
plain is specified as the first argument, any possible errors are suppressed. The option may not be abbreviated, in order to disambiguate
it from possible variable names. The option -- indicates the end of the options, and should be used if you wish to remove a variable with
the same name as any of the options. If an error occurs, any variables after the named one causing the error not deleted. An error can
occur when the named variable does not exist, or the name refers to an array element but the variable is a scalar, or the name refers to a
variable in a non-existent namespace.
EXAMPLE
Create an array containing a mapping from some numbers to their squares and remove the array elements for non-prime numbers:
array set squares {
1 1 6 36
2 4 7 49
3 9 8 64
4 16 9 81
5 25 10 100
}
puts "The squares are:"
parray squares
unset squares(1) squares(4) squares(6)
unset squares(8) squares(9) squares(10)
puts "The prime squares are:"
parray squares
SEE ALSO
set(n), trace(n), upvar(n)
KEYWORDS
remove, variable
Tcl 8.4 unset(n)