racket/htdp

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Stars: 112
Forks: 73
Open beginner issues: 0
Indexed issues: 50
Avg merge: 9h 41m
Merged PRs (30d): 1

Dominant language: Racket
License: No license data
Last GitHub push: Sep 18, 2026
Latest indexed: Sep 19, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: good first issue

Beginner friendly Everything

Open All

50 open issues indexed

XML boxes have not provided user-facing error messages for BSL Open

enhancement

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

racket/htdp#265 · Opened Sep 3, 2026
Support type-annotated `struct` definitions Open

signature

Difficulty 5/5 Over a week Newbie friendliness 38/100

racket/htdp#259 · 5 comments · Opened Mar 25, 2026
Signature definitions without `signature` Open

signature

Difficulty 4/5 3-5 days Newbie friendliness 48/100

racket/htdp#256 · 3 comments · Opened Mar 25, 2026
Alias `mixed` as `one-of` Open

signature

Difficulty 2/5 1-3 hours Newbie friendliness 64/100

racket/htdp#255 · 3 comments · Opened Mar 25, 2026
Stepper loops on Omega Open

bug stepper

Difficulty 4/5 3-5 days Newbie friendliness 45/100

racket/htdp#254 · 4 comments · Opened Feb 18, 2026
Problem With Algebraic Stepper Scrolling To Top? Open

stepper

racket/htdp#250 · 4 comments · 1 assignee · Opened Nov 24, 2025
Allow for removing the inset in 2htdp/universe Open

enhancement teachpack

Difficulty 4/5 3-5 days Newbie friendliness 35/100

racket/htdp#235 · 1 comment · 1 reaction · Opened Dec 11, 2024
`port-writes-special?` ⊂"running under Dr Racket" Open

test engine

Difficulty 5/5 Over a week Newbie friendliness 25/100

racket/htdp#234 · 2 comments · Opened Dec 7, 2024
Stepper does not step for `check-satisfied` Open

enhancement stepper test engine

racket/htdp#232 · 4 comments · 1 assignee · Opened Nov 16, 2024
HTDP Signatures - missing Image type in BSL Open

signature

Difficulty 3/5 1-2 days Newbie friendliness 45/100

racket/htdp#202 · 7 comments · Opened Sep 23, 2023
test coverage false negative in #lang htdp/bsl Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

racket/htdp#200 · 21 comments · Opened Sep 18, 2023
Make *test-object* in test-engine a parameter Open

test engine

Difficulty 3/5 1-2 days Newbie friendliness 45/100

racket/htdp#199 · 6 comments · Opened Aug 13, 2023
#; not fading correctly in the menu languages(htdp) Open

wontfix

Difficulty 3/5 1-2 days Newbie friendliness 35/100

racket/htdp#179 · 4 comments · Opened Oct 2, 2022
Support for transparent overlays Open

teachpack

Difficulty 5/5 Over a week Newbie friendliness 30/100

racket/htdp#175 · 3 comments · Opened Sep 12, 2022
Warn when tracing is enabled with big-bang? Open

teachpack

Difficulty 4/5 3-5 days Newbie friendliness 38/100

racket/htdp#170 · Opened Apr 6, 2022
Using stepper on template Open

stepper

racket/htdp#168 · 8 comments · 1 assignee · Opened Feb 19, 2022
Expose image=? from BSL Open

teachpack

Difficulty 3/5 1-2 days Newbie friendliness 35/100

racket/htdp#164 · 4 comments · Opened Dec 16, 2021
[ASL] Value of `set!` Open

bug enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

racket/htdp#162 · 1 comment · Opened Nov 12, 2021
Support for flipping text? for emojis Open

good first issue teachpack

Difficulty 4/5 3-5 days Newbie friendliness 35/100

racket/htdp#161 · 3 comments · 1 reaction · Opened Oct 15, 2021
stepper fails for unbound id in test position of check-expect Open

stepper test engine

Difficulty 3/5 1-2 days Newbie friendliness 35/100

racket/htdp#153 · 26 comments · Opened Jul 15, 2021
Race Condition in the Test Engine When There are Multiple Files Open

test engine

Difficulty 4/5 3-5 days Newbie friendliness 35/100

racket/htdp#150 · Opened May 10, 2021
color-list->bitmap doc vs. DrRacket rendering Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

racket/htdp#148 · 11 comments · Opened Apr 28, 2021
Docking of test window appears not to work with stepper window Open

stepper

Difficulty 4/5 3-5 days Newbie friendliness 25/100

racket/htdp#147 · Opened Apr 28, 2021
BSL decimal number values paste as non-textual Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

racket/htdp#134 · 6 comments · 2 reactions · Opened Feb 12, 2021
stepper doesn't handle check-error with 1 arg correctly Open

bug stepper

racket/htdp#131 · 1 assignee · Opened Jan 25, 2021
new check-expect output with large values is hard to read Open

test engine

racket/htdp#122 · 2 comments · 1 assignee · Opened Nov 25, 2020
package compatibility fallout from recent changes Open

racket/htdp#121 · 10 comments · 1 assignee · Opened Nov 11, 2020
Problems with very large images Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

racket/htdp#105 · 8 comments · Opened Aug 24, 2020
Program by design site has broken link to draft of 2nd ed of htdp Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

racket/htdp#104 · Opened Jun 17, 2020
freeze doesn't rewrite arity errors Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

racket/htdp#100 · Opened Jun 5, 2020
Jump-to-selected-expression doesn't work for many locations Open

stepper

racket/htdp#93 · 1 assignee · Opened Jan 25, 2020
Need check-random-within Open

enhancement teachpack

Difficulty 5/5 Over a week Newbie friendliness 35/100

racket/htdp#88 · 1 comment · Opened Dec 9, 2019
Stepper shows different error than "Run" for use-before-definition Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

racket/htdp#71 · Opened Oct 25, 2018
stepper scrolling behavior still not really right Open

stepper

racket/htdp#70 · 1 assignee · Opened Oct 23, 2018
stepper + big bang broken since 2014, sigh. Open

enhancement stepper teachpack

racket/htdp#69 · 5 comments · 1 assignee · Opened Sep 12, 2018
image composition functions (overlay, beside, above) inconsistent with arithmetic (+) in ISL Open

enhancement teachpack

Difficulty 3/5 1-2 days Newbie friendliness 35/100

racket/htdp#68 · 2 reactions · Opened Sep 6, 2018
The documentation of 2htdpimage should have illustrations for each option Open

teachpack

Difficulty 3/5 1-2 days Newbie friendliness 35/100

racket/htdp#183 · 3 comments · Opened Jul 12, 2018
Large Matrix's overflow into next expression. Open

Difficulty 3/5 1-2 days Newbie friendliness 32/100

racket/htdp#54 · Opened May 23, 2018
Placeholders break function calls in interactions window Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

racket/htdp#47 · 7 comments · Opened Nov 15, 2017
tracing+define-struct causes `syntax-original?` error Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

racket/htdp#44 · 1 comment · Opened Oct 30, 2017
Provide better string operations in *SL Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

racket/htdp#197 · 1 comment · Opened Oct 16, 2017
Universe canvas is partly hidden by Windows task bar, can't move or resize it Open

teachpack

Difficulty 4/5 3-5 days Newbie friendliness 35/100

racket/htdp#31 · Opened Mar 15, 2017
dc<%> error for (make-circle 8675309) Open

enhancement teachpack

Difficulty 4/5 3-5 days Newbie friendliness 35/100

racket/htdp#24 · 1 comment · Opened Sep 28, 2016
in ASL `(void)` doesn't print as `(void)` Open

bug enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

racket/htdp#21 · 10 comments · Opened Mar 8, 2016
Stepper doesn't show steps for some programs Open

stepper

racket/htdp#20 · 9 comments · 1 assignee · Opened Feb 15, 2016
Keys in Steppers Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 42/100

racket/htdp#18 · Opened Dec 18, 2015
Documentation on KeyEvent is unclear on what shift+a produces. Open

good first issue

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

racket/htdp#10 · 3 comments · Opened Sep 13, 2015
Random last image in animated gifs Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

racket/htdp#9 · Opened Jul 26, 2015
Canvas window cannot be closed with keyboard on OS X Open

good first issue

Difficulty 3/5 1-2 days Newbie friendliness 35/100

racket/htdp#5 · 2 comments · Opened Jun 1, 2015
Why is 2htdp/planetcute so complicated? Open

teachpack

Difficulty 5/5 Over a week Newbie friendliness 25/100

racket/htdp#2 · 5 comments · Opened Feb 28, 2015

racket/htdp

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