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As the title says i am looking for a way to search through stackoverflow.com using only the command line specifically bash in linux.
Things I need to accomplish :
I just need to get the top 10 answers for my question or even top 5.
Plain Text Output , i.e. strip
HTML out if possible.
Also I would prefer if you didnt give a answer that required elinks or something similar.
here's a rough script to run from command line that does the job
wget 'http://stackoverflow.com/feeds/tag?tagnames=command-line&sort=newest' -qO - | perl -nle ' print $1 if /\<title[^>]+\>([^<]*)/;'|head
It grabs RSS output for a given tag (command-line here) and sort of parses it.
To be done properly one would probably want to parse XML in a better way or use some perl rss parser.
Related
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I use a bash script (konsole-name.sh) to change a terminal name, like this:
#!/usr/bin/bash
echo -en "\e]30;$1\a"
and I wanted to use the same method from a perl script that I use to check the GPU temperature, so that it updates periodically the window title.
Yet I didnt find a way.
I tried both this:
$comm='echo -en "\e]30;T=$t\a"';
`$comm`;
and this, using my bash script:
$comm="konsole-name.sh T=$t";
`$comm`;
there is some way to do it?
The console escape sequences work by printing text to the terminal. In your case, the backticks gobble up the output of the script.
Most likely you just want print "\e]30;$1\a"; from within Perl:
my $title = "Fancy terminal title";
print "\e]30;${title}\a";
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In zsh, I can execute them.
$ sleep 1
$ echo !$ # !$ equals 1
$ echo !! # !! equals sleep 1
But I can't execute them in fish shell.
Could tell me why and where the zsh documentation is?
This is history expansion, which has a lot more to it then those simple examples.
Fish supports none of it (and probably never will). The usual workaround is to use keybindings. By default, alt-up and alt-down should go through the history token-wise, so you can press alt-up once to get what is effectively !$.
If you wish to prepend something to a command from history, recall that command, go to the beginning (e.g. with ctrl-a) and insert what you want.
Other possibilities are functions to bind e.g. !! to something to insert the previous command or to make a command called !!.
This is still discussed in fish issue #288, though concensus seems to be against adding history expansion.
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Sorry for asking this question.I know Perl operators are very importance while writing Perl script.Can any one provide me all Perl operators with examples or else give any links for my case
See perlop. If you have Perl installed, you can read this from the command line with perldoc perlop (unless you have one of those idiotic distributions Linux distros that removed the perldoc program).
To learn more about Perl in general, start reading perldoc perltoc (table of contents) for Perl and perldoc perlintro.
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I want to write some notes in the draft of a LaTeX document, and at a later point I want to compile the document without them. I saw someone doing something like the following (but I forgot what he did). Write notes as {\scriptsize some_text}, and in the end replace all {\scriptsize ...} with {} with a \newcommand. But I can't figure out how to write a \newcommand to replace all {\scriptsize some_text} occurrences by empty strings. I can then just comment or uncomment the \newcommand line.
Declare in the beginning of your file
\somevariabletrue
%\somevariablefalse
so you can quickly uncomment one and comment second, and in the later part of your code:
\ifsomevariable
...
\else
...
\fi
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is there any pgp key dumping program like http://www.pgpdump.net/ that also shows the MPI values as well as the other information? the linked website's program will print out ... for the long MPI, which is perfectly logical, but I want to see the values since my program is for some reason getting all but one part right (reading an elgamal public key), and its messing with everything that comes afterwards. i want to see where im off by a few bits
gpg --list-packets --debug-all should show MPI values.
pgpdump.net links to the source code of pgpdump. Perhaps you could find the part where ... is written and change it in a local copy of the program.