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LispPad Go is a similar tool focusing on scheme R7RS. It’s been great for writing little scripts. Been using it for a few years now. Racket would be compelling

LispPad Go is a similar tool focusing on scheme R7RS. It’s been great for writing little scripts. Been using it for a few years now. Racket would be compelling though because of the number of libraries. https://apps.apple.com/us/app/lisppad-go/id1565747728 https://apps.apple.com/us/app/lisppad-go/id1565747728

s20n 6mo ago
I just tried this out, this is amazing! It does actually have a lot of R7RS support (like #!fold-case) however it doesn't seem to work with polar complex numbers (e.g; 2@1.5) or complex numbers with infnan (e.g; 3+inf.0i or +inf.0+3i). more about the implementation: https://www.lisppad.app/applications/language https://www.lisppad.app/applications/language
- objecthub 6mo ago
  Author from LispPad here... Polar complex number literals are actually not part of R7RS and (make-polar ...) would need to be used for writing portable code. Complex number literals with infinite parts are supported, but I noticed that LispPad might behave differently as it does apply mathematical equivalences that are being ignored in other Scheme implementations. Let me know if you see a behavior that violates the R7RS spec. Thanks!
  - s20n 6mo ago
    Thanks for working on LispPad, I'm really enjoying using it. > Polar complex number literals are actually not part of R7RS I actually thought they were part of the spec. Specifically, I am referring to the last paragraph from section 6.2.5 of R7RS small <https://small.r7rs.org/attachment/r7rs.pdf https://small.r7rs.org/attachment/r7rs.pdf> This is the excerpt from the pdf: 6.2.5. Syntax of numerical constants ... There are two notations provided for non-real complex numbers: the rectangular notation a+bi, where a is the real part and b is the imaginary part; and the polar no- tation r@θ, where r is the magnitude and θ is the phase (angle) in radians. These are related by the equation a + bi = r cos θ + (r sin θ)i. All of a, b, r , and θ are real numbers.
    - objecthub 6mo ago
      Thanks for the reference! I must have overlooked this when implementing the scanner. Will definitely be added. Thanks for letting me know.
zerr 6mo ago
Didn't Apple restrict language interpreters on App Store?
- c0balt 6mo ago
  They restricted JIT, interpreters are fine afaik. See also dart etc. Edit: JIT is under a flag, https://developer.apple.com/documentation/bundleresources/entitlements/com.apple.security.cs.allow-jit https://developer.apple.com/documentation/bundleresources/en...
  - zerr 6mo ago
    So no JIT conversion to byte code either?

s20n 6mo ago

I just tried this out, this is amazing! It does actually have a lot of R7RS support (like #!fold-case) however it doesn't seem to work with polar complex numbers (e.g; 2@1.5) or complex numbers with infnan (e.g; 3+inf.0i or +inf.0+3i). more about the implementation: https://www.lisppad.app/applications/language https://www.lisppad.app/applications/language

objecthub 6mo ago
Author from LispPad here... Polar complex number literals are actually not part of R7RS and (make-polar ...) would need to be used for writing portable code. Complex number literals with infinite parts are supported, but I noticed that LispPad might behave differently as it does apply mathematical equivalences that are being ignored in other Scheme implementations. Let me know if you see a behavior that violates the R7RS spec. Thanks!
- s20n 6mo ago
  Thanks for working on LispPad, I'm really enjoying using it. > Polar complex number literals are actually not part of R7RS I actually thought they were part of the spec. Specifically, I am referring to the last paragraph from section 6.2.5 of R7RS small <https://small.r7rs.org/attachment/r7rs.pdf https://small.r7rs.org/attachment/r7rs.pdf> This is the excerpt from the pdf: 6.2.5. Syntax of numerical constants ... There are two notations provided for non-real complex numbers: the rectangular notation a+bi, where a is the real part and b is the imaginary part; and the polar no- tation r@θ, where r is the magnitude and θ is the phase (angle) in radians. These are related by the equation a + bi = r cos θ + (r sin θ)i. All of a, b, r , and θ are real numbers.
  - objecthub 6mo ago
    Thanks for the reference! I must have overlooked this when implementing the scanner. Will definitely be added. Thanks for letting me know.

zerr 6mo ago

Didn't Apple restrict language interpreters on App Store?

c0balt 6mo ago
They restricted JIT, interpreters are fine afaik. See also dart etc. Edit: JIT is under a flag, https://developer.apple.com/documentation/bundleresources/entitlements/com.apple.security.cs.allow-jit https://developer.apple.com/documentation/bundleresources/en...
- zerr 6mo ago
  So no JIT conversion to byte code either?