| Author |
how to suppress set command output ??
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| nishit.gupta@st.com 2007-04-25, 7:07 pm |
| Hi all,
i am new to tcl and having problem with set command.
Normally whenever one uses set command to initialize a variable its
value is also shown on console
i.e.
set temp_var [read $file]
--> all the content of the file will be listed out here now (which i
want to suppress)
my file consists of around 300000 lines which i do not want to listed
out because
i am using this command in a console of a tool (simvision) and after
running this command to
read complete file in a temp variable my console is getting hung.
Is their any way so that i can suppress the output of set command
thanx in advance
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| Helmut Giese 2007-04-25, 7:07 pm |
| On 25 Apr 2007 07:01:45 -0700, nishit.gupta@st.com wrote:
>Hi all,
>i am new to tcl and having problem with set command.
>Normally whenever one uses set command to initialize a variable its
>value is also shown on console
>i.e.
>set temp_var [read $file]
>--> all the content of the file will be listed out here now (which i
>want to suppress)
>my file consists of around 300000 lines which i do not want to listed
>out because
>i am using this command in a console of a tool (simvision) and after
>running this command to
>read complete file in a temp variable my console is getting hung.
>Is their any way so that i can suppress the output of set command
>thanx in advance
Hi,
just follow it with a comand which prints nothing like
set temp_var [read $file] ; puts ""
or maybe even
set temp_var [read $file] ; puts [string range $temp_var 80]
which shows you the first 80 characters from the file you just read.
HTH
Helmut Giese
| |
| Bryan Oakley 2007-04-25, 7:07 pm |
| Helmut Giese wrote:
> On 25 Apr 2007 07:01:45 -0700, nishit.gupta@st.com wrote:
>
> Hi,
> just follow it with a comand which prints nothing like
> set temp_var [read $file] ; puts ""
> or maybe even
> set temp_var [read $file] ; puts [string range $temp_var 80]
> which shows you the first 80 characters from the file you just read.
> HTH
> Helmut Giese
When I'm in a similar situation I sometimes do something like this:
% string length [set temp_var [read $file]]
You could also define your own silent set command:
proc sset {varname value} {
uplevel [list set $varname $value]
return ""
}
--
Bryan Oakley
http://www.tclscripting.com
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| mpc.janssen@gmail.com 2007-04-25, 7:07 pm |
| On 25 Apr 2007 07:01:45 -0700, nishit.gupta@st.com wrote:
>Hi all,
>i am new to tcl and having problem with set command.
>Normally whenever one uses set command to initialize a variable its
>value is also shown on console
>i.e.
>set temp_var [read $file]
>--> all the content of the file will be listed out here now (which i
>want to suppress)
>my file consists of around 300000 lines which i do not want to listed
>out because
>i am using this command in a console of a tool (simvision) and after
>running this command to
>read complete file in a temp variable my console is getting hung.
>Is their any way so that i can suppress the output of set command
>thanx in advance
The last result is always shown in the console when using it
interactively. The trick is therefore to not make that read the last
result. You could use:
set temp_var [read $file] ; puts ok
This will show ok and not the contents of the tempvar.
Mark
| |
| Helmut Giese 2007-04-25, 7:07 pm |
| On Wed, 25 Apr 2007 14:20:36 GMT, Bryan Oakley
<oakley@bardo.clearlight.com> wrote:
>When I'm in a similar situation I sometimes do something like this:
>
>% string length [set temp_var [read $file]]
Hey, that's cute - could convey some useful information.
| |
| suchenwi 2007-04-26, 4:16 am |
| The most simplest way I know is:
set data [read $f]; list
as [list] with no arguments returns "" :^)
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| Larry W. Virden 2007-04-26, 7:08 pm |
| On Apr 25, 10:01 am, nishit.gu...@st.com wrote:
..
> Normally whenever one uses set command to initialize a variable its
> value is also shown on console
For someone wandering by, this behavior only occurs when one is
interactively working with tcl. Executing the commands within a file
do not have this behavior.
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