Is anyone aware of any public repo with a Poleen book, so that I can understand what’s the best way to structure the sources and info.rkt?

@pocmatos here is a handful:

https://github.com/otherjoel/try-pollen

https://github.com/otherjoel/thenotepad

https://github.com/malcolmstill/mstill.io

https://github.com/mbutterick/pollen-tfl

@githree that’s great, thanks. Strangely github found no repos, based on pollen keyword.

no problem

https://github.com/halla/mindonmaps-book

https://github.com/sanchom/sanchom.github.io

is the current Racket version for new builds correct? (e.g. 6.90.0.17—2018–03–01)

(not that this is important, just seems many versions ahead of 6.12, hahaha)

Yes, that’s as intended. “6.90.x” means “pre–7.0”.

what is the difference between pollen and Scribble, besides surface syntax?

eh ill ask the mailing list

why is today a special date for Racket? (based on the loading splash image when I spin up DrRacket)

http://www.on-this-day.com/cgi-bin/otd/statesotd/otdTX.pl

(a guess)

ahh that would explain the prominent star in the splash image

Hi, is it a known issue that typed/racket/base/no-check is slower than racket/base? For a program that simply (displayln "hello"), typed/racket/base/no-check consistently takes 0.4s while racket/base takes 0.1s

@sorawee there has been effort to reduce startup overhead with Typed Racket… I’m not sure if it has been observed/noted that in particular the typed/racket/base/no-check variant also has startup overhead. (It seems like it should be able to avoid most of it after the files are expanded… @samth could better answer this for sure)

Is that with or without running raco make first?

(I observed it after making the two modules)

➜ raco make example1.rkt
➜ raco make example2.rkt
➜ time racket example1.rkt
hello
racket example1.rkt  0.04s user 0.02s system 92% cpu 0.068 total
➜ time racket example2.rkt
hello
racket example2.rkt  0.29s user 0.10s system 97% cpu 0.403 total

cool!

@mflatt Interestingly enough, the fix you pushed doesn’t seem to work if the variable is specifically called version:

#lang racket/base

(define version 42)

(module M racket/base
  (provide (all-defined-out))
  (define version 42))
(require 'M)

(or any other variable defined in racket/base.

@leif Thanks for the example! I think I have a repair for the case that a require shadows the initial language require, and I’ll push if a rebuild and further tests work.

@mflatt Okay cool. Thanks. :slightly_smiling_face:

@mflatt It looks like video compiles again with the new expander. Thanks. ^.^