On Monday, June 19, 2017 at 5:12:10 PM UTC-7, Glenn Hoetker wrote:
> I'm quite new to Racket/LISP, so I hope this isn't breathtakingly obvious.
> Can someone please tell me the best way to capitalize just the first word in
> a multiword string. So, given the string "it was a dark and stormy night", I
> would like to get "It was a dark and stormy night". I see functions for
> turning everything lower case, everything uppercase or capitalizing each
> word, but nothing in line with what I hope to do.
>
> > (define it "cat dog")
> > (string-titlecase it)
> "Dog Cat" ; So close, but not quite "Dog cat" as I want.
>
> Many thanks.
You'll want to split the string into a list of words and apply the
capitalization function to only the first word.
(define (capitalize-first sentence-str)
(string-join (list-update (string-split sentence-str) 0 string-titlecase)))
Disclaimer: this will do some weird things to the whitespace in sentence-str
(e.g. convert newlines to spaces); you might want to tweak that.
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