How do I get tanh in jsweet?

Question

I am using JSweet to transpile Java into Javascript and I need to use Math.tanh() but it's not available in the jsweet.lang.Math object, but I see it in the source:

https://github.com/cincheo/jsweet/blob/426e379958fc5392f8328d8e431caac0cf95653e/core-lib/es6/src/main/java/def/js/Math.java#L161

It's also missing from the API documentation:

http://public.jsweet.org/apidocs/releases/org/jsweet/candies/jsweet-core/1.2.0-20161222/jsweet/lang/Math.html

Which Math is it using and how do I use the one that implements tanh() ?

Have you tried using one of the [identities](https://en.wikipedia.org/wiki/Hyperbolic_function#Definitions) for `tanh`? — bradimus, Jul 10 '17 at 15:00
I want to maintain performance of using the native `tanh` if I can since it's for distributed machine learning purposes — Kristopher Ives, Jul 10 '17 at 15:17
You're probably not going to get better performance than just using those identities. — Louis Wasserman, Jul 10 '17 at 20:06

score 0 · Answer 1 · answered Aug 16 '17 at 20:59

If you want to use Math.tanh(), which is an ECMAScript 6 feature, you should target ES6 in your pom.xml and add a reference to core-lib 6.

Anyway, if you feel that way, you can also use this MDN equivalent using just simple Math.exp() calls: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/tanh#Polyfill

Easy to use in JSweet :)

Hope this helped.

How do I get tanh in jsweet?

1 Answers1