71 lines
2.0 KiB
Markdown
71 lines
2.0 KiB
Markdown
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# `Math` Extensions Proposal
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- [Polyfill](https://www.npmjs.com/package/ecma-proposal-math-extensions)
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- [Spec](https://rwaldron.github.io/proposal-math-extensions)
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## Champion
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Rick Waldron
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## Status
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This proposal is currently stage 1 of [the TC39 process](https://github.com/tc39/ecma262/).
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## Motivation
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These functions exist in many, many JS libraries either hand rolled or via [many modules on npm](https://www.npmjs.com/search?q=math). Providing them as built-ins serves to pave cow path. Implementations and naming is inconsistent. Several other languages offer these as built-ins.
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Java
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- https://docs.oracle.com/javase/7/docs/api/java/lang/Math.html
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+ `Math`
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+ `Math.toDegrees(double angrad)`
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+ `Math.toRadians(double angdeg)`
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- JSR275
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+ [Unit specification](https://www.jcp.org/en/jsr/detail?id=275)
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- [JScience](http://jscience.org/)
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Python
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- Math
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- https://docs.python.org/2/library/math.html#angular-conversion
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- https://docs.python.org/3/library/math.html#angular-conversion
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+ `math`
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+ `math.degrees(x)`
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+ `math.radians(x)`
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- [Units](https://pypi.python.org/pypi/units)
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Racket
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- [Math](https://docs.racket-lang.org/reference/generic-numbers.html#%28def._%28%28lib._racket%2Fmath..rkt%29._degrees-~3eradians%29%29)
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+ 4.2.2.10 Extra Constants and Functions
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- [Operations on Measures](https://docs.racket-lang.org/measures-with-dimensions/Operations__Types__and_Structs.html#%28part._.Operations_on_.Measures%29)
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+ 1.1.1 Operations on Measures
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Rust
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- https://doc.rust-lang.org/std/primitive.f32.html
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- https://doc.rust-lang.org/std/primitive.f64.html
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## Questions
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- `Math.map`
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+ Is it...
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- `Math.scale` <-- this
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- `Math.map`
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- `Math.remap`
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+ Should there be a corresponding `Math.fmap`? (ie. https://tc39.github.io/ecma262/#sec-math.fround, Step 3 & 4 convert result to IEEE 754-2008 binary32 (using roundTiesToEven), then to IEEE 754-2008 binary64).
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- `Math.constrain`
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+ Is it...
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- `Math.constrain`
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- `Math.clamp`
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