how () in regular expressions work
Thanks much.
On Fri, Jan 4, 2013 at 3:44 PM, Sam Tobin-Hochstadt wrote:
On Fri, Jan 4, 2013 at 3:37 PM, Galler <lzgal...@optonline.net> wrote:
Could you possibly briefly elaborate on how the parentheses in the
regular
expression make the destructuring work?
The () in the pattern work exactly like they do in `regexp-match`.
(regexp-match #px"([\\D]*)([\\d]+\\.[\\d]+)([\\D]*)" "This is a 40.2
Song about Japan")
'("This is a 40.2 Song about Japan" "This is a " "40.2" " Song about
Japan")
Scroll down in these docs:
http://docs.racket-lang.org/reference/regexp.html#%28def._%28%28quote._~23~25kernel%29._regexp-match%29%29
to where it says "additional [byte] strings" to see a full description
of how () in regular expressions work.
Sam
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