Careful, you don't have it right:
Try to echo the $startpoint. You will not have the backticks there. It's because the backticks mean "output of this command" when in weak (double) quotes. So the shell is trying to execute command "HOOOP" and inserting the output (empty) in the var $startpoint.
What you want, is to escape the backticks:
The 'w' command of sed will write the block to tmp.sql. Watch the spaces, as any extra space will be considered as part of the filename:
Will create a file named 'tmp.sql '.
Is there any way to delete the Junk Characters(Invalid Characters like ^,',",),(,&,# etc.,) at the end of each record in a file?
I want to do this using a single line script.
Thanks to all in advance!!! (5 Replies)
Hi, I've got a file where in the middle of the record is a $ end of line character, visible only when I open the file in vi and do :set list. How to I get rid of the character in the middle and keep it at the end. The middle $ character always appears after SW, so that can be used to tag it.... (3 Replies)
Hi All
i need to delete a recurring word from point "n" till end of the file. there are other words in this file so i cannot use `dG`, can anyone help me out?
Kind regards
Brian (4 Replies)
I have a text file with two coulmn
first column is just used in to show the line number, these line number are not there in the real file.
I want to delete the line 16(in this file) here, even tough there is no data inside it . this empty line is causing me a problem by throwing me garbage... (12 Replies)
does any one know how to turn the equivalent of this command:
awk '/2011 John Doe 8344/,0' /tmp/ops.log | egrep -c "received request"
to
something that would use egrep instead of awk?
What the awk command does is, it searches the ops.log file for "2011 John Doe 8344". When it finds it,... (4 Replies)
Hi Guys,
I have a quetion which was already discussed in the forum, but for some reason all approches suggested fail for me.
I have a file which have blank lines at the body of the text as well as at the end. I need to delete ONLY blank lines at the end. Unfortunatly the approach below does not... (5 Replies)
My server got messed up and the names of my files were not completely processed. As results I ended up getting a bunch of files with the following names:
I need to remove the underscore and everything before it. Thus, the files will be renamed to something like this:
Any help will be greatly... (3 Replies)
hi,
I would like to ask or is it possible to dump a hex using dd from starting point to end point just like the "xxd -s 512 -l 512 <bin file>"
I know the redirect hexdump -C but i can't figure it out the combination options of dd.
Hope someone can share their knowledge..
Thanks in... (3 Replies)
Hi,
I am trying to remove lines once a string is found till another string is found including the start string and end string. I want to basically grab all the lines starting with color (closing bracket). PS: The line after the closing bracket for color could be anything (currently 'more').... (1 Reply)
Discussion started by: Dabheeruz
1 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)