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Is this the best way of getting whitespace characters into my console output? (displayln (string-append "hello" (~a #\tab) "esteemed user"))
Concatenating string parts together with converted whitespace characters
Thinking I might write a little macro to provide convenient/dangerous interpolation that I’m accustomed to from PHP: http://php.net/manual/en/language.types.string.php#language.types.string.syntax.double
Normal escape characters work fine in racket literals so you could have done (displayln "hello\testeemed user") and it would be the same afaik. Using string-append is fine too. What you did is also equivalent to (displayln (format "hello~aesteemed user" #\tab")).
Oh, thanks! I made the mistake of originally building this example with writeln
Yeah that can be confusing. Good rule of thumb is that display formats for output (so for example #\a prints as simply a), while write formats so the output can be read back in as racket syntax (so #\a would print back as #\a).
@royall For some things at-expressions can be handy: http://www.greghendershott.com/2015/08/at-expressions.html
I’ve been working with web-server/servlet for a little while now, and I’ve been wondering, does it matter if I reuse embed/url between requests? or should I get a new embed/url for each request?