Re: [racket-users] Random values in Typed Racket?

I wouldn't suggest using `set!` that way -- I'm a big fan of internal `define`. Sam On Thu, Jul 6, 2017 at 12:19 PM, David Storrs wrote: > > > On Thu, Jul 6, 2017 at 8:53 AM, Sam Tobin-Hochstadt > wrote: >> >> Just for clarity, here's an example

Re: [racket-users] Random values in Typed Racket?

On Thu, Jul 6, 2017 at 8:53 AM, Sam Tobin-Hochstadt wrote: > Just for clarity, here's an example using `set!` and `define`, > although I wouldn't really suggest this style: > > #lang typed/racket > > (: f : Real -> Real) > (define (f x) > (define rand-value (random)) >

Re: [racket-users] Random values in Typed Racket?

Just for clarity, here's an example using `set!` and `define`, although I wouldn't really suggest this style: #lang typed/racket (: f : Real -> Real) (define (f x) (define rand-value (random)) (define new-value (+ x rand-value)) (set! new-value (- new-value x)) new-value) Sam On Wed,

Re: [racket-users] Random values in Typed Racket?

Well, after a bit of fiddling, I've discovered I can indeed do what I need to, with a judicious use of "let" for creating a swag of random values, and ensuring that their use is all within the scope of let. So far, all good! On Thursday, 6 July 2017 10:54:53 UTC+10, Royall Spence wrote: >

Re: [racket-users] Random values in Typed Racket?

Sounds like two questions wrapped into one. When it comes to setting names to values, Scheme programming encourages the use of a "let" expression to bind values to names inside of a (usually narrow) scope rather than assigning a value to a variable. See more here:

[racket-users] Random values in Typed Racket?

I'm doing a little programming which requires the use of some random numbers. Basically I add a random value at one stage, and subtract it a bit later. Something like this pseudo-code (where "x" is an existing variable): set rand_value <- (random) set new_value <- x + rand_value ...