enhancementgood first issue
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Descrizione
In DrRacket, this program:
#lang typed/racket #:no-optimize
(: plus (-> (U String Integer)
(U String Integer)
(U String Integer)))
(define (plus x y)
(cond
[(and (number? x) (number? y))
(+ x y)]
[(number? x)
(string-append
(format "~a" x)
(format "~a" y))]
[(string? x)
(string-append
(format "~a" x)
(format "~a" y))]
[else
(+ x (car x))]))
shows no tooltips in the (+ x (car x)) bit. It would be nice to show something about what's going on (not just silence).