Alexander Burger <a...@software-lab.de> writes: Hi Alex,
> isn't this what you mean? > > (de replaceUrlWildcard (U W) > (let Y (split (chop U) "*") > (glue " " > (mapcar > '((X) (pack (car Y) X (cadr Y))) > W ) ) ) ) > > (replaceUrlWildcard > "http://software-lab.de/doc/ref*.html"; > '("A" "B" "C" "D" "E" "F" "G" "H" "I" "J" "K" "L" "M" "N" "O" "P" > "Q" "R" "S" "T" "U" "V" "W" "X" "Y" "Z" ) ) > > -> "http://software-lab.de/doc/refA.html > http://software-lab.de/doc/refB.html ... > > Side note: Though the result of 'pack' is the same, I would recommend > (cadr Y) instead of (cdr Y), to reflect the result of 'split'. > > >> An external program reads the URL's like this: >> >> ,------------------------------------------------------------------------------ >> | (setq UrlStrings_ref (prin "\"" (replaceUrlWildcard U_ref W_ref) "\"")) > > If you use 'print' instead of 'prin' here, you don't need to supply the > double quotes yourself: > > : (print "abc") > "abc"-> "abc" > > gives the same _output_ as > > : (prin "\"" "abc" "\"") > "abc"-> "\"" > > >> Yes, I don't where these 4 """" quotes come from - do they have a >> special >> meaning in Picolisp? I don't remember ... > > If the reader sees two double quotes in sequence, it returns NIL > (representing the empty string) > > : (list "a" "" "b") > -> ("a" NIL "b") > > Therefore, """" read as two NILs > > : (list "a" """" "b") > -> ("a" NIL NIL "b") > > which in turn disappear in the 'pack' > > (pack '("a" NIL NIL "b")) > -> "ab" just for the record, this from your PM: ,------------------------------------------ | (de replaceUrlWildcard (U W) | (let Y (split (chop U) "*") | (mapcar | '((X) (pack "\"" (car Y) X (cadr Y) "\"")) | W ) ) ) `------------------------------------------ and then: ,----------------------------------------------------------- | (apply call | (replaceUrlWildcard Uxxx Wyyy) | "pandoc" "-s" "-S" "-o" "/home/tj/picolisp-ref.org" ) `----------------------------------------------------------- did the job perfectly - thanks. -- cheers, Thorsten -- UNSUBSCRIBE: mailto:picolisp@software-lab.de?subject=Unsubscribe
