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[feature request] ~r like function #108

Closed sorawee closed 4 years ago

sorawee commented 4 years ago

(number->string 0.80) results in "4/5", which is usually not a format suitable for display. Although we can hack it with (number->string (exact->inexact 0.80)) to get 0.8, it's still not possible to pad 0s or truncate excessive fractional part of a decimal.

It would be nice to have a function similar to ~r from Racket in student languages so that numbers can be formatted easily.

sorawee commented 4 years ago

Pyret has num-to-string-digits, FWIW.