Hi there!

Usually, sed can be used in different ways, but most of the time we use it to match lines in a file against a fixed regexp. Some examples:

This replaces ocurrences of regexp for "foo":

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sed 's/regexp/foo/g' < myfile

  

This prints all lines that have "foo", but will change the first "o" in the line for an "a":

 undefined

    
sed -n '/foo/s/o/a/p' < myfile

  

and so on...

But I tried to do a different thing, with no success: can I pass to sed a file with a bunch of regular expressions and test them against a fixed string? I tried to play with pattern space, hold space, with no success. It just seems impossible to use them (which would be the closest to "variables") in search commands.

I know sed is Turing complete, but using it that way would maybe require to implement a regexp engine from scratch?

Thanks!

After a long time I'm in a situation where I sometimes work on a temporary system without my individual setup. Now whenever I might add a new custom (nushell) command that abstracts the usage of CLI tools, I think about the loss of muscle memory/knowledge for these tools and how much time I waste looking them up without my individual setup. No, that's not a huge amount of time, but just out of curiosity I'd like to know how I can minimize this problem as much as possible.

Do you have some tips and solutions to handle this dilemma? I try to shadow and wrap existing commands, whenever it's possible, but that's often not the case. Abbreviations in fish are optimal for this problem in some cases, but I don't think going back to fish as my main shell for this single reason would be worth it.

I'm hosting mirrors of these at my domain.

• Bash Hacker's Wiki
• Zsh Manual
• Zsh Guide

I want to interactively query nix pkgs using the nix-search command provided by nix-search-cli

Not really experiaenced in cli tools any ideas to make this work ?

The document itself is paywalled like all the POSIX specifications, so here are some highlights courtesy of some comments at HackerNews, especially from a-french-anon.

• readlink and realpath
• find -print0, xargs -0 and read -d
• find -iname
• sed -E
• set -o pipefail
• $' ' strings

At the moment, I am stuck with using single-precision float, and double-precision float. So, the maximum represent-able value for single is 1<<24 while for double, it is 1<<53.

Because of this, I made the following script here - https://gist.github.com/Reptorian1125/71e3eec41e44e2e3d896a10f2a51448e .

Allow me to clarify on the script above. On the first part, rep_bin2dec does is to return the converted values into the status. So, when I do ${} or variable=${rep_bin2dec\ ???}, I get the status string.

On the second part, rep_bin2dec_base is the basis for getting rep_bin2dec to work. _rep_bin2dec_base prints the base_10M array into a string.

So, how does rep_bin2dec_base converts a big binary into big decimal?

1. If the binary image is less than dimension of 54, then the script will use 0b{} which allows me to directly convert binary to decimal, and 0b is a binary literal much in the same way that Python and C++ does it. From this point, it's pretty obvious

https://discord.gg/JT6RMMfP

I've written small bash scripts before, but I bit off a little more this time, and I'm trying to program a little terminal game.

Anyway, I've run into a weird behavior. I have a function that, among other things, writes values to an array and returns either 0 or 1.

If I write echo "${name_of_array[@]}" inside the function, I see the contents of the array printed to standard output.

If I write echo "${name_of_array[@]}" outside the function immediately after executing the function, I see the contents of the array printed to standard output. (So, clearly the array is being treated as a global variable.)

But if I write the following, regardless of which value the function returns, nothing is printed to standard output but an empty line.

 undefined

    
if ! name_of_function ; then
 echo "${name_of_array[@]}"
fi

  

Why is that the case? Doesn't name_of_function get executed when evaluating the if statement? Is this some special case where all variables become local?

I realize I could just

Hello! I love broot. It's not my own project, but this blog post is, so feel free to send any questions or insults my way.

Previews:

• Drill down to change folder
• Complete a partially typed argument with a path filter
• Complete with a file-content filter

Looks like v0.90 was skipped on nushell blog, so expect minor changes from these release notes

This release of fish includes a number of improvements over fish 3.6.4, detailed below. Although work continues on the porting of fish internals to the Rust programming language, that work is not included in this release. fish 3.7.0 and any future releases in the 3.7 series remain C++ programs.

Notable improvements and fixes

• Improvements to the history pager, including:
• The history pager will now also attempt subsequence matches (#9476), so you can find a command line like git log 3.6.1..Integration_3.7.0 by searching for gitInt.
• Opening the history pager will now fill the search field with a search string if you’re already in a search (#10005). This makes it nicer to search something with ↑ and then later decide to switch to the full pager.
• Closing the history pager with enter will now copy the search text to the commandline if there was no match, so you can continue editing the command you tried to find right away (#9934).
• Performance improvements for comman