samth changed the topic of #racket to: Racket v7.9 has been released: https://blog.racket-lang.org/2020/11/racket-v7-9.html -- Racket -- https://racket-lang.org -- https://pkgs.racket-lang.org -- Paste at http://pasterack.org
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<dzoe> samth: Will you, please, ping Asumu to update the PPA as well? (Sorry to bother you, but I remember it was you who managed to contact him last time).
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<cybersyn> hi y'all, i'm using Racket to work through SICP with #lang sicp. if I want to start using the unicode λ instead of (lambda ) is there a quick way to import it?
<ecraven> not sure whether Racket brings anything with it, but you might be able to use `define-syntax'
<ecraven> I just use Emacs, which can *display* a nice λ, but still leaves it "lambda" underneath
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<cybersyn> ecraven: thanks! yeah, I'm using emacs as well. the issue is that the #lang sicp /doesnt/ include unicode. i'll check out define-syntax though, thanks!
<cybersyn> oohh, i get what you're saying
<cybersyn> whats the trick for making that happen?
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<ecraven> there are better packages for this, but this will work: http://ix.io/2Pq5
<ecraven> just call that function to enable it (for every buffer)
<ecraven> for example (add-hook 'scheme-mode-hook #'pretty-lambdas)
<ecraven> you can do it for anything else you want too, I also have pretty-lameds ;)
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<cybersyn> ecraven: thank you!
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<XorSwap> I have an expression like (func1 (func2 (func3 (func4 value)))), is there a way to write that nicer, without the )))) ?
<dzoe> XorSwap: Like (add1 (add1 (add1 (add1 4)))) to ((compose add1 add1 add1 add1) 4) ?
<dzoe> (Not a very useful example, but it shows the pattern).
<dzoe> And if you care about performance, then compose1 is your friend - see https://docs.racket-lang.org/reference/procedures.html?q=compose%2B#%28def._%28%28lib._racket%2Fprivate%2Flist..rkt%29._compose%29%29
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