commandlinefu.com is the place to record those command-line gems that you return to again and again.
Delete that bloated snippets file you've been using and share your personal repository with the world. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.
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Wow, didn't really expect you to read this far down. The latest iteration of the site is in open beta. It's a gentle open beta-- not in prime-time just yet. It's being hosted over at UpGuard (link) and you are more than welcome to give it a shot. Couple things:
Same functionality without using bash functions.
POSIX compliant arithmetic evaluation.
This is an "argument calculator" funktion. The precision is set to 4 and you can use dot (.) or comma (,) as decimal mark (which is great for german users with a comma on the numpad).
This opens a python command line. You can use math and random and float-division is enabled (without appending .0 to integers). I just don't know how to specify a standard precision.
use python as calculator, press ctrl+d to exit
reminder: when doing factions add atleast one decimal number like so
22.0/7 or 22/7.0
works with fractions like 1/3.5
terms inclosing '()' must be enclosed by "" (soft quotes)
bash variables must be referenced: b $x/$y
ugly bracket checking (balanced, fractions...)
default precision 2
defines a handy function for quick calculations from cli.