Support constant for phi

[brianrodri]

My most-common use case for insect happens to be calculating column widths using phi (aka the Golden ratio).

It'd be very nice to have it defined as a global-constant, where

phi = φ = (1 + sqrt(5)) / 2

[sharkdp]

Sounds great - thank you!

The only concern I have is to use phi as the name. phi is quite a common variable name for a general angle. Maybe we could simply introduce it as golden_ratio? It's quite a bit longer, but we have tab completion. What do you think?

[bitzl]

I just was about to open the same issue - any news on this?

Personally, I wouldn't care if it's phi or golden_ratio since there is tab completion.

Please tell me if there is anything I could do to help to add this feature.

[sharkdp]

To be honest, I do not recall why I reverted the changes in sharkdp/purescript-quantities#40 in sharkdp/purescript-quantities@8ee17b7. Probably they caused some issues when I reactivated CI. If you want to help, you could attempt to re-open a new PR in purescript-quantities that includes the changes from sharkdp/purescript-quantities#40.

[triallax]

I've already added phi to purescript-quantities and will add it to Insect soon, but in the meanwhile you can put this in your insectrc file (#248):

phi = (1 + sqrt(5)) / 2