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I have a problem to cd into my usb drive (F:) using PowerShell and I can't use variables becouse I am starting PowerShell with Start-Process. I tried using
cd (Get-Volume -FileSystemLabel NameOfUsb).DriveLetter:
and it almost works but "F" has a space after it and ":" is in new line so it spits out error.
Is there any way to do it? It don't have to be using that method
You really should include the full Start-Process line you are trying to run. However, this should do what you want.
cd "$((Get-Volume -FileSystemLabel NameOfUsb).DriveLetter):\"
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I think I run something incorrectly trying to add a directory to PATH in fish. Perhaps it was this:
set -g PATH my_foobar_directory "$PATH"
From fish tutorial I now understand that I shouldn't have added the double-quotes.
Better yet, should've used fish_add_path my_foobar_directory.
Lesson learned; however, the change has persisted somewhere, and nothing I try seems to recover the previous state. I also cannot find the previous PATH value — the console logs with it were washed away by copious fish: Unknown command: python etc, from fish_prompt bells & whistles.
Falling back to bash gives me bogus PATH as well — even after set -e PATH.
What do? How do I start over?
So for myself, I solved it like this.
In the process tree, I found a sufficiently long-running process. In my case, cinnamon-session worked — though any not-so-distant fish parent would do.
The idea being that in that process's environment, the previous PATH value could still be intact. It was.
Then basically — let's say the pid was 661 — print environment of pid 661 in fish format:
/bin/tr \0 ' ' < /proc/661/environ
# copy output
Then just pick that output, and feed it into the "universal" variant (fish-specific) of the PATH variable, taking care to erase all other variants:
set -e PATH
set -eg PATH
set -Ux PATH <paste>
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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 Windows 7, I need to use Maple to export the Tex code into a text file.
In Command-line Maple, I type latex(LambertW(x), "C:/Users/Bravo/Desktop/out.txt"); to do this, but the result is:
{\rm W} \left(x\right)
That is not right, why does it happen ? Is there any method to solve this problem ?
Yeah, that is a bug in Maple. You can try latex(subs(LambertW=lambertW,erf=Erf,arctanh=Artanh,LambertW(x)));
Reference: http://www.mapleprimes.com/questions/201975-Maple-Error-Using-Latex-Command-How-To-Resolve#comment207767
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I am trying to run this code, but have reached a dead end due to my inexperience.
http://dde.binghamton.edu/download/camera_fingerprint/
The code is trying to call the Cpp fucntion mdwt in MATLAB, and that gives error. I changed the function call in MATLAB to coder.ceval but that gives the error "Too many output arguments." I would be grateful to anyone who would point out what I am doing wrong in implementing this code. Thanks in advance!
These files are source code for mex functions, which can be compiled using the mex command. The compile.m from the zip file contains the necessary commands to compile the mex files.
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I have a program reading one file and I want to read multiple files so I wrote a script to read those files and send them to the program (args in main) but some how it is not getting the input. I wanted to know the possible ways that I can send info to args(1).
Instead of piping the files to Java (via |) you should simply invoke your Scala program with the JPG argument appended. (I'm assuming Scala since that's what you have tagged your question with.)
Something like:
scala YourScalaProgram tmp.jpg
assuming that all necessary jars, etc., are on your CLASSPATH.