What is known as variable substitution is your friend for such cases, you substitue a default value rather then ending with a variable not set.
Syntax:
Addendum:
Sorry I should have read to the end - Did not see you were in perl...
Hi everyone, and thank you for your help with this. I am VERY new with perl so all of your help is appreciated. I have tried google but as I don't know the proper terms to search for and could be daunting for a newbie scripter... I know this is very easy for most of you! Thanks!
I have a... (4 Replies)
I need a way to extract data from
X 4T Solution 21 OCT 2011 37 .00
to account 12345678 User1 user2
X 4T Solution Solution Unlimited 11 Sep 2009 248 .00
to account 87654321 user3 user4
I need it to extract 'X' '37.00' and account number 12345678.
I have extracted above stuff... (3 Replies)
I am completely new to perl programming. My father is helping me learn said programming language. However, I am stuck on one of the assignments he has given me, and I can't find very much help with it via google, either because I have a tiny attention span, or because I can be very very dense.
... (4 Replies)
hi
i am writing a hangman script and am having trouble checking the correct letters against the word
i need the script to compare the word against the letters guessed that are correct so once all the letters within the word have been guessed it will alow me to create a wining senario
eg
... (3 Replies)
Dear Perl users,
Could somebody help me how to fix my code so I can get my desired output.
Here is the data:
Pattern Gabriel
halo1
halo2
end
Pattern Andreas
halo1
halo2
endI want to grep multiple lines between the pattern /Pattern Gabriel / and /end/.
Then I will store the output into... (6 Replies)
Hi All,
i have a requirement where i have to run a script with at least 25 arguements and position of arguements can also change. the unapropriate way is like below. can we achieve this in more good and precise way??
#!/bin/ksh
##script is sample.ksh
age=$1
gender=$2
class=$3
.
.
.... (3 Replies)
Hello,
I would like to ask for help with csh script.
An example of an input in .txt file is below, the number of lines varies from file to file and I have 2 or 3 columns with values. I would like to read all the values (probably one by one) and set them to independent unique variables that... (7 Replies)
Hi All,
I need to read values of 10 columns from oracle query and assign the same to 10 unix variables. The query will return only one record(row).
I tried to append all these columns using a delimiter(;) in the select query and assign the same to a single variable(V) in unix. I thought I... (3 Replies)
I have reviewed many examples on-line about running another process (either PERL or shell command or a program), but do not find any usefull for my needs way. (Reviewed and not useful the system(), 'back ticks', exec() and open())
I would like to run another PERL-script from first one, not... (1 Reply)
Discussion started by: alex_5161
1 Replies
LEARN ABOUT OPENDARWIN
tcl_substobj
Tcl_SubstObj(3) Tcl Library Procedures Tcl_SubstObj(3)__________________________________________________________________________________________________________________________________________________NAME
Tcl_SubstObj - perform substitutions on Tcl objects
SYNOPSIS
#include <tcl.h>
Tcl_Obj *
Tcl_SubstObj(interp, objPtr, flags)
ARGUMENTS
Tcl_Interp *interp (in) Interpreter in which to execute Tcl scripts and lookup variables. If an error occurs, the inter-
preter's result is modified to hold an error message.
Tcl_Obj *objPtr (in) A Tcl object containing the string to perform substitutions on.
int flags (in) ORed combination of flag bits that specify which substitutions to perform. The flags TCL_SUBST_COM-
MANDS, TCL_SUBST_VARIABLES and TCL_SUBST_BACKSLASHES are currently supported, and TCL_SUBST_ALL is pro-
vided as a convenience for the common case where all substitutions are desired.
_________________________________________________________________DESCRIPTION
The Tcl_SubstObj function is used to perform substitutions on strings in the fashion of the subst command. It gets the value of the string
contained in objPtr and scans it, copying characters and performing the chosen substitutions as it goes to an output object which is
returned as the result of the function. In the event of an error occurring during the execution of a command or variable substitution, the
function returns NULL and an error message is left in interp's result.
Three kinds of substitutions are supported. When the TCL_SUBST_BACKSLASHES bit is set in flags, sequences that look like backslash substi-
tutions for Tcl commands are replaced by their corresponding character.
When the TCL_SUBST_VARIABLES bit is set in flags, sequences that look like variable substitutions for Tcl commands are replaced by the con-
tents of the named variable.
When th TCL_SUBST_COMMANDS bit is set in flags, sequences that look like command substitutions for Tcl commands are replaced by the result
of evaluating that script. Where an uncaught continue exception occurs during the evaluation of a command substitution, an empty string is
substituted for the command. Where an uncaught break exception occurs during the evaluation of a command substitution, the result of the
whole substitution on objPtr will be truncated at the point immediately before the start of the command substitution, and no characters
will be added to the result or substitutions performed after that point.
SEE ALSO
subst(n)
KEYWORDS
backslash substitution, command substitution, variable substitution
Tcl 8.4 Tcl_SubstObj(3)