> On Dec 27, 2017, at 19:06, Jay McCarthy <[email protected]> wrote: > > This seems to be consistent with my Web browser and editor. Are the > symbols eq? or equal?
Neither. Am I misunderstanding you? Here’s code: #lang racket (define bad-symbol (string->symbol "\uFEFFhello")) (define regular-symbol 'hello) bad-symbol regular-symbol (equal? bad-symbol regular-symbol) (eq? bad-symbol regular-symbol) this evaluates in DrR to: Welcome to DrRacket, version 6.11.0.5--2017-12-20(-/f) [3m]. Language: racket, with debugging; memory limit: 4096 MB. 'hello 'hello #f #f > If you copy and paste these from the interactions into the definitions window, you can even get this: #lang racket (equal? 'hello 'hello) (eq? 'hello ‘hello) evaluates to: Welcome to DrRacket, version 6.11.0.5--2017-12-20(-/f) [3m]. Language: racket, with debugging; memory limit: 4096 MB. #f #f > Did you misunderstand me, or did I misunderstand you? John > > On Wed, Dec 27, 2017 at 3:54 PM, 'John Clements' via Racket Users > <[email protected]> wrote: >> I was working with files containing a Byte Order Mark today, and in the >> process of writing a test case, I discovered that >> >> (string->symbol “\uFEFF”) >> >> produces a symbol whose printed representation is >> >> ‘hello >> >> … which seems unfortunate; I guess I would have expected something like >> >> ‘|\uFEFFhello| >> >> (… although I see now that this kind of escaping is not currently enabled >> inside vertical bars). >> >> This leads to situations where two symbols with the same printed >> representation may not be equal?, which seems unfortunate. >> >> Am I overlooking a good reason why this is the desired behavior? >> >> John >> >> >> >> -- >> 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 [email protected]. >> For more options, visit https://groups.google.com/d/optout. > > > > -- > -=[ Jay McCarthy http://jeapostrophe.github.io ]=- > -=[ Associate Professor PLT @ CS @ UMass Lowell ]=- > -=[ Moses 1:33: And worlds without number have I created; ]=- > > -- > 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 [email protected]. > For more options, visit https://groups.google.com/d/optout. -- 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 [email protected]. For more options, visit https://groups.google.com/d/optout.
