rr is a great debugging tool. it records a trace of a program's execution, as well as the results of
any syscalls it executes, so that you can "rewind" while you debug, and get deterministic forward and reverse
instrumented playback. it works with rust, but by default if you try it out, it could be pretty ugly when you
inspect variables. if this bothers you, configure gdb to use a rust pretty-printer
rr is probably in your system's package manager.
| This work, excluding the Arch Linux logo, is made available under CC0: https://creativecommons.org/publicdomain/zero/1.0/ |
I've been working on a parser for a Haskell-like syntax called Duet. In the implementation I've taken particular care to make an awesome tokenizer and parser that is super helpful to learners.
Jasper Van der Jeugt made a talk about producing good error messages recently, which coincides nicely with my parallel work on this. So I thought I'd also share my
| E017 DO YOU EXPECT ME TO FIGURE THIS OUT? | |
| E079 PROGRAMMER IS INSUFFICIENTLY POLITE | |
| E099 PROGRAMMER IS OVERLY POLITE | |
| E111 COMMUNIST PLOT DETECTED, COMPILER IS SUICIDING | |
| E123 PROGRAM HAS DISAPPEARED INTO THE BLACK LAGOON | |
| E127 SAYING ’ABRACADABRA’ WITHOUT A MAGIC WAND WON’T DO YOU ANY GOOD | |
| E129 PROGRAM HAS GOTTEN LOST | |
| E139 I WASN’T PLANNING TO GO THERE ANYWAY | |
| E182 YOU MUST LIKE THIS LABEL A LOT! | |
| E197 SO! 65535 LABELS AREN’T ENOUGH FOR YOU? |
These are things that I found annoying writing a complex library in Kotlin. While I am also a Scala developer, these should not necessarily be juxtaposed w/ Scala (even if I reference Scala) as some of my annoyances are with features that Scala doesn't even have. This is also not trying to be opinionated on whether Kotlin is good/bad (for the record, I think it's good). I have numbered them for easy reference. I can give examples for anything I am talking about below upon request. I'm sure there are good reasons for all of them.
| # GIT heart FZF | |
| # ------------- | |
| is_in_git_repo() { | |
| git rev-parse HEAD > /dev/null 2>&1 | |
| } | |
| gf() { | |
| is_in_git_repo || return | |
| git -c color.status=always status --short | |
| -- LICENSE | |
| -- | |
| -- This software is dual-licensed to the public domain and under the following | |
| -- license: you are granted a perpetual, irrevocable license to copy, modify, | |
| -- publish, and distribute this file as you see fit. | |
| -- VERSION 0.1.0 | |
| -- Author: Forrest Smith (github.com/forrestthewoods/lib_fts) | |
| -- Translated to Lua by Blake Mealey (github.com/blake-mealey) |
|  | |
|  |
| -- script.lua | |
| -- Receives a table, returns the sum of its components. | |
| io.write("The table the script received has:\n"); | |
| x = 0 | |
| for i = 1, #foo do | |
| print(i, foo[i]) | |
| x = x + foo[i] | |
| end | |
| io.write("Returning data back to C\n"); | |
| return x |
| {-# LANGUAGE | |
| LambdaCase, GADTs, TypeOperators, TypeFamilies, DataKinds #-} | |
| data Type = TInt | TBool | Type :=> Type | |
| -- Needs GHC >= 7.8 | |
| type family Interp (t :: Type) where | |
| Interp TInt = Int | |
| Interp TBool = Bool | |
| Interp (a :=> b) = Interp a -> Interp b |