#!/usr/bin/ksh
echo Please enter
while read n
do
echo $n >> datafile
done
question:
How can I enject an if statement that if the users enter 0 (zero) the program will exit?
this is what I have but not working
#!/usr/bin/ksh
echo Please enter number
while read n
do
if $n=0
then... (2 Replies)
Hi all,
How can i use the below unix command in AWK . Can any one please suggest me how i can use.
sed -e "s/which first.sh/which \$0/g" $shell > $shell.sal
where $0=current program name(say current.sh)
$shell=second.sh (1 Reply)
I need to pass a DDL statement into a ksh script & parse the statement.
What is the best way to pass a DDL statement into a KSH script.
---------- Post updated at 09:28 AM ---------- Previous update was at 07:35 AM ----------
if the name of the script is test.ksh
test.ksh "ALTER TABLE... (12 Replies)
Hi,
I'm doing a small shellscript which is going to take each line in a "queue file" and do stuff to them. I can do the script easily, but I'd like this one to be a bit prettier.
Consider the following perl statement:
...
foreach my $line (@filedata) {
my ($a, $b, $c) = split(/\t/,... (4 Replies)
Hey guys,
a=`cat abc | wc -l`
b=`cat def | wc -l`
if $a== $b
then
echo "a"
else
echo "b"
fi
I want the if condition to retry itself , untill a==b.
I can't use goto statemt.
Please help.
Thanx in advance.
Please use next time code tags for your code and data (5 Replies)
Hi all.
This is my first post on this forum. I've previously found great help in the huge knowledgebase that is here, but this time I have not been able to find a solution to my problem.
I have a large text file that looks like this:
typedef struct ABC_struct_nbr1_ {
char attr1; /*... (0 Replies)
I have the following scenario where I need to use a header record from a file and generate a DML based off of it...
E.g.: The header can change periodically with an additional column in between or remove a col....
Sample header : (head -1 sample.txt)... (17 Replies)
Hi,
I'm a rookie who is trying to learn this stuff. What I need help with is putting together a non complicated "while" loop within the below "if" statement. I also need the while loop to keep looping until the user types a key to end the loop. Please reveal the proper insertion points. Thank... (4 Replies)
Hi,
Can we use 3 statements convert in a single statement.
First statement output using the second statement and the second statement output using the third statement please let me know the syntax so that I can able to merge all the three statement. (2 Replies)
Hi folks,
I have a scenario to convert the update statements into insert statements using shell script (awk, sed...) or in database using regex.
I have a bunch of update statements with all columns in a file which I need to convert into insert statements.
UPDATE TABLE_A SET COL1=1 WHERE... (0 Replies)
Discussion started by: dev123
0 Replies
LEARN ABOUT MOJAVE
update
update(n) Tcl Built-In Commands update(n)
__________________________________________________________________________________________________________________________________________________NAME
update - Process pending events and idle callbacks
SYNOPSIS
update ?idletasks?
_________________________________________________________________DESCRIPTION
This command is used to bring the application "up to date" by entering the event loop repeatedly until all pending events (including idle
callbacks) have been processed.
If the idletasks keyword is specified as an argument to the command, then no new events or errors are processed; only idle callbacks are
invoked. This causes operations that are normally deferred, such as display updates and window layout calculations, to be performed imme-
diately.
The update idletasks command is useful in scripts where changes have been made to the application's state and you want those changes to
appear on the display immediately, rather than waiting for the script to complete. Most display updates are performed as idle callbacks,
so update idletasks will cause them to run. However, there are some kinds of updates that only happen in response to events, such as those
triggered by window size changes; these updates will not occur in update idletasks.
The update command with no options is useful in scripts where you are performing a long-running computation but you still want the applica-
tion to respond to events such as user interactions; if you occasionally call update then user input will be processed during the next
call to update.
EXAMPLE
Run computations for about a second and then finish:
set x 1000
set done 0
after 1000 set done 1
while {!$done} {
# A very silly example!
set x [expr {log($x) ** 2.8}]
# Test to see if our time-limit has been hit. This would
# also give a chance for serving network sockets and, if
# the Tk package is loaded, updating a user interface.
update
}
SEE ALSO
after(n), interp(n)
KEYWORDS
event, flush, handler, idle, update
Tcl 7.5 update(n)