The rvm help command output looks strange [closed] - ruby

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When I type in ubuntu terminal:
$ rvm help use
The command output looks like:
M-bM-^HM-4 rvm use [ruby-string]
Setup current shell to use a specific ruby version.
...
What are the M-bM-^HM-4 characters? Should I use a special command to read the help?

This are unicode characters:
∴ rvm list

I see it too. Looks like it's just some weird characters that the documenter typed in before every instance of the term "rvm".
Likely on their console, it highlights the term, or something similar.

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How to write a file in ruby without a terminating newline [closed]

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For debugging purposes, I want to alter a rake test so as not to end a saved file with a newline.
I don't know ruby. How do I do this? (file.print doesn't seem to work.)
Not clear what you are doing, but since you tried file.print, it looks like you have access to what is to be printed. Let's say this is string. My guess is that string already has a newline character. Then do:
file.print(string.chomp)

How do I get Stack Overflow answers inside a terminal? [closed]

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Is there a way to query Stack Overflow directly from the command line and get back the most upvoted answer to the first question that comes up for that query?
I really mislike having to open up my browser whenever I want to brush up on my knowledge of writing RegExes for matching XHTML tags.
Yes, it is possible! Try out Benjamin Gleitzman's excellent tool howdoi.
It works like this:
$ howdoi get stackoverflow answers inside a terminal
and the program will query StackOverflow for keywords "get stackoverflow answers inside a terminal", find the question that best matches these terms and return the code from the best answer to that question.
You can also add the -a option to get the full answer, not just the code. So to get an answer for your example query, you would do:
$ howdoi -a RegEx match XHTML tags
Installation
If you have Python & pip installed, you can get it from the Cheese shop.
$ pip install howdoi
More help
Enter howdoi -h for complete usage instructions.

How to write a path with LaTeX? [closed]

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How can I write a path with LaTeX? I want something like this:
C:\\Program Files\\My Program\\my file.txt
I have to use double slashes, not single ones.
Found this:
How does one insert a backslash or a tilde into Latex
The Comprehensive LaTeX Symbol List is your friend. \textbackslash and \textasciitilde are found in Table 2 of the list
So you should try
C:\textbackslash\textbackslash Program Files\textbackslash\textbackslash My Program\textbackslash\textbackslash my file.txt

Identifying and adapting unix-"isms" to the Windows command prompt [closed]

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In the Python Pyramid tutorial, I encountered this phrase:
"Windows users will need to adapt the Unix-isms below to match their environment."
It appears to relate to the "Export" command, but I am not entirely sure. The question therefore, is how do others go about this process of identifying and adapting "Unix-isms"? My only method so far is to see what isn't recognized, and obviously that could be due to different reasons.
Regarding research, I may have found a paywalled explanation for export specifically, but I'm sure there are better resources for adapting these commands.
Thank you!
The $ symbol is a Unix prompt
The ; is a command separator
export sets sets an environment variable, similar to setx
PATH=/path/to/tutorial_workspace/venv/bin:$PATH is modifying the PATH environment variable, similar to PATH=/path/to/tutorial_workspace/venv/bin;%PATH%
which searches the PATH for a program and returns its location.

unset path in windows [closed]

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how can I remove enry from the PATH in windows, to set path I need to use SET PATH command but I can't find what do I need to do remove some entry from the path (UNSET PATH is not working), thanks in advance
P.S. from command line in windows
You can't remove an individual item from an environment variable. You have to read in the current value, parse it, remove what you want to remove, and then reset the variable.
If you aren't doing this in code then I can recommend Rapid Environment Editor as an excellent tool to make this work easy.

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