#ruby on 2025-03-02 — irc logs at libera.irclog.whitequark.org

2025-02-14 21:39 havenwood changed the topic of #ruby to: Ruby 3.4.2, 3.3.7 https://www.ruby-lang.org | Log https://libera.irclog.whitequark.org/ruby

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01:35 <leftylink> hello friends is it possible to syntax sugar factorial?

01:35 <leftylink> I guess the best we can do is something like defining _!

01:36 <leftylink> pandabot: rb using(Module.new { refine(Integer) { def _! = (1..self).reduce(1, :*) }}); 5._!

01:36 <pandabot> 120 - https://carc.in/#/r/hqsj

01:36 <leftylink> if there's a better way I am eager to hear about it

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06:19 <havenwood> leftylink: You could use a unary method for `!5` syntax, which seems factorialish.

06:20 <havenwood> class Integer def !@ = (1..self).reduce(:*) || 1 end

06:21 <havenwood> or rather: class Integer def !@ = (1..self).reduce(1, :*) end

06:21 <havenwood> But yeah, `def ~@` is the best I can think of and it seems nice.

06:21 <havenwood> `def !@` I mean.

06:22 <havenwood> I think it's a reasonable refinement.

06:33 <havenwood> leftylink: See https://gist.github.com/havenwood/55439b0b4666e4f1ea59eb0a3837209b

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15:51 <gr33n7007h> /fset

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18:11 <kyber> havenwood: that's cool

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21:41 <o0x1eef> +1 havenwood

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