[racket-users] Re: Operations that create objects

Thank you for the examples and clarification. -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. For more options, visit

Re: [racket-users] Re: Operations that create objects

Two examples: #lang racket (define (create-function-that-show-number n) (display "*") (lambda () (displayln n))) ;Create the function (define f7 (create-function-that-show-number 7)) ;Use it (displayln "Hello") (f7) (displayln "World!") ;--- ;Something more complex

Re: [racket-users] Re: Operations that create objects

The outer function must return the inner function (or otherwise make it reachable, perhaps inside some data structure). For example: > (define (make-counter init) (define (counter) (set! init (add1 init)) init) (displayln "Making a counter!") counter) > (define

Re: [racket-users] Re: Operations that create objects

Thank you so much. This is extremely helpful and instructive. One thing I don't understand: how do you call or access an inner function after its outer function has completed? On Fri, Dec 16, 2016 at 5:41 AM, George Neuner wrote: > On Thu, 15 Dec 2016 06:03:54 -0800

[racket-users] Re: Operations that create objects

On Thu, 15 Dec 2016 06:03:54 -0800 (PST), NeverTooOldToCode wrote: >Racket Reference section 1.1.5 states: "Operations that create >objects, such as vector, add to the set of objects" followed >by a nice and instructive step-by-step evaluation example. >Further on, lambda