The leading '(stdin)=' messes the pattern being fed to 'grep'.
Yes, I've read http://partmaps.org/era/unix/award.html#cat . The output of sha1sum already contains a trailing '-' which is something I wanted to feed into 'grep' using command substitution, so that 'grep' can now just accept the input stream from 'stdin'. Now, how do you feed the input to grep via 'stdin' if you don't want to use 'cat'?
If you look where we started ( http://news.ycombinator.com/item?id=4076559 ), I'm not trying to feed the regex pattern to grep via stdin, but I'm trying to feed the input stream to be searched for the pattern to grep via stdin.
No, he is trying to demonstrate how to use 'xargs node -e'.
Are you even reading this discussion properly or are you just searching for some shell snippets and ridicule them as soon as you get a chance? This is what it looks like from your history: http://news.ycombinator.com/threads?id=uselessuseof
Yeah I'm aware of http://partmaps.org/era/unix/award.html#cat and choose to continue writing my scripts this way. My commands look more symmetric at the prompt, and are easier to manipulate.
dups is indeed a little helper of mine. Like uniq it only handles sorted input. Update: I see you edited your answer to include uniq -d. I wasn't aware of the option, thanks. Now I can simplify the implementation of dups. But I find the name valuable, and I think it's perverse to say uniq when you mean its opposite.
Each pipe stage reads from the left and writes to the right. The eye goes left to see the input and right to see the output if it's redirected to file.
The input file is reliably the second word, so C-A M-f gets me to it if I want to operate on a different file. !!:1 gets me the file if I want to use it in a new command.
I'm not sure what you're suggesting. I'm supposed to echo |cut ...? But I have a whole file, not just one line. So I have to cat ... |cut ... -- which is what I did. So what's your point?
I could keep the file first by saying:
$ < combo_not.txt cut -c7-40 |sort |dups |wc -l
To which I reply, "Yuck!"
Perhaps we should stop here. You seem to have made this account just a few hours ago for the express purpose of poking at people's code fragments in this thread. You're making stylistic nitpicks (they don't affect correctness, do they?) and you're making them in a tone that I'm not sure I would take from Randal Schwartz himself (you actually edited http://news.ycombinator.com/item?id=4076556 to be ruder than the original). It's a drag, man.
