I'm working on modernizing Rosetta Code's infrastructure. Starting with communications. Please accept this time-limited open invite to RC's Slack.. --Michael Mol (talk) 20:59, 30 May 2020 (UTC)

Talk:Brace expansion using ranges

From Rosetta Code

Out of curiosity – stepped Alpha seen working in the (unix shell) wild ?[edit]

There is a reference to stepped alpha expansions in the increment section of the reference to which I linked in the task description (https://wiki.bash-hackers.org/syntax/expansion/brace#increment) (referred to without elaboration as an 'interesting feature').

The only reason that haven't implemented it myself (in the current draft of the JS reference implementation) is that it didn't match what I was seeing (macOS Catalina) either in the default zsh command line or in a script with the preamble #!/bin/bash, neither of which expand {a..z..3} to anything other than itself.

I don't think that's a good reason to discourage implementing stepped alpha brace ranges here – they seem a good idea, and we do have that reference – but I wondered (idly) if anyone has actually seen stepped alpha expansions work in the wild (where wild is defined as a shell prompt or shell script). Hout (talk) 17:57, 26 August 2020 (UTC)

Ah. Got it. It's because the macOS Catalina distribution of Bash turns out to be 3.2, rather than 4. Hout (talk) 18:06, 26 August 2020 (UTC)