CIAvash

Website of Siavash Askari Nasr

Programming : Programming

How to write Raku's trans routine/operator in Go

By CIAvash •

I was looking for a way to transliterate(translate) English numbers to Persian numbers in Go. Such functionality is usually found in programming languages, but I wasn't expecting too much from Go. It's very easy to do in Raku: say 567.trans: '0'..'9' => '۰'..'۹' =output ۵۶۷␤ say TR/0..9/۰..۹/ given 567 =output ۵۶۷␤ For Go I found xstrings module which has a Translate function. But the solution I came up with was using NewReplacer function from Go's internal strings module:

T - Easy way of writing test assertions which output good test descriptions and error messages in Raku

By CIAvash •

After I finished watching Daniel Sockwell's FOSDEM 2022 Raku presentation, I thought this is a good opportunity to play with Raku's slangs, something I hadn't done before. What is Daniel's talk(and upcoming module) and my module going to solve? Write less but more readable test code Get a useful test description and failure message If you use cmp-ok, you get a good error message; but without a test description it's sometimes hard to understand.

Raku, Go, Chroma, Germanium, Hugo and my blog

By CIAvash •

When I created my Raku programming language website with Hugo static site generator, I had to manually create the syntax highlighted html files for code examples shown in the front page, because Hugo used Chroma(written in Go and uses a mostly similar API to Pygments) for syntax highlighting which didn't support Raku. So I opened an issue on Chroma, the discussion showed that you cannot just convert the Raku lexer from Pygments to Chroma; You would need to create some functions manually, and Chroma needed a new Emitter interface which would take the LexerState as an argument, because Raku has some complex syntax; the Raku lexer in Pygments had functions for finding closing brackets matching the opening brackets, and for regex nesting in tokens, regexes and rules.