Dealing Repeated pattern in StringReplace

Question

A problem about StringReplace

When I'm running into this problem possible [bug]

str11 = "<strong style=\"font-size:20px\" style=\"color:#dfa57c\"
style=&quot;font-size:20px&quot; style=&quot;color:#dfa57c&quot; class=&quot;new&quot;>";
StringCases[str11,
Repeated[Shortest["style=&quot;" ~~ ___], {2, 10}] ~~ "&quot;"]
(*
    {style="font-size:20px" style="color:#dfa57c",style="font-size:20px" style="color:#dfa57c"
}
*)

There is a problem of the above code, there are two result, how can I get just one Max repeated result? Something like the effect of Longest

Here is like the following result.

StringCases[str11, Repeated[Shortest["style=\"" ~~ ___], {4}] ~~ "\""]
(*
    {style="font-size:20px" style="color:#dfa57c" style="font-size:20px" style="color:#dfa57c"
}
*)
StringReplace[str11,
x : Repeated[Shortest["style=&quot;" ~~ ___], {2, 20}] ~~ "&quot;"]
(*
    <strong ="font-size:20px" style="color:#dfa57c ="font-size:20px" style="color:#dfa57c clas
s="new">
*)
StringReplace[str11,
p : Repeated[Shortest["style=&quot;" ~~ ___], {4}] ~~ "&quot;" :>
"style=" <>
StringReplace[
StringJoin[


Riffle[StringSplit[
StringReplace[p, "style=" -> ""], {"style=", " "}],
";", {2, -1, 2}]], "&quot;;&quot;" -> "; "] <> "&quot;"]
(*
    <strong style="font-size:20px; color:#dfa57c; font-size:20px; color:#dfa57c;" class="new">
*)

Question: Can the count be removed? Are there any simpler solutions?

htmlStringTrim[x_] := (count = StringCount[x, "style"];
StringReplace[x,
p : (Repeated[Shortest["style=&quot;" ~~ ___], {count}]) ~~ "&quot;" :>
StringJoin[


Riffle[StringSplit[p, {"&quot; style=&quot;"}], "; ", {2, -1, 2}]] <>
"&quot;"])
htmlStringTrim[str11]
(*
    <strong style="font-size:20px; color:#dfa57c; font-size:20px; color:#dfa57c; " class="new"
>
*)

Thanks for Mr.Wizard's answer.

htmlStringTrimNew[x_] := 
  StringReplace[x, 
   p : (("style=\"" ~~ Except["\""] .. ~~ "\"" ~~ 
     Whitespace | "") ..) :> (
 "style=\"" <> 
  StringJoin[
   StringInsert[StringReplace[#, "\"" :> ""], ";", -2] & /@ 
    StringSplit[p, {"style=\""}], "\""])];

I think this should answer your question, unless I missed the point which is possible here. - using the StringCase function and Shortest option — Kuba, Apr 26 '15 at 13:28
HyperGroups do you agree with Kuba that your question is answered in the linked Q&A? — Mr.Wizard, May 13 '15 at 09:13
@Mr.Wizard I don't agree that, the most confused problem of the question is how to match the repeated pattern. that problem is matching pattern from left to right something like Map[StringCases[#, Shortest["|uniprotkb:" ~~ aa__ ~~ "(gene name)"] -> aa, Overlaps -> True] &, test1] — HyperGroups, May 27 '15 at 09:42
@HyperGroups could you reduce the question to the unique problem. It is so large now it discourages from reading, imo. — Kuba, May 27 '15 at 10:28
Okay. I don't know a better solution to the Repeated problem but I'll think about it. Incidentally htmlStringTrim does not give me the output that you show; instead I get: "<strong style=\"font-size:20px; color:#dfa57c\" style=\"font-size:20px; color:#dfa57c; \" class=\"new\">" — Mr.Wizard, May 27 '15 at 13:09
@Mr.Wizard Hi, I found that's the problem about there generate a new line \\ in StackExchange in str11, which will affect the function. Now I‘ve removed that. — HyperGroups, May 27 '15 at 13:28
I posted an answer relating to the pattern (which also handles the newline). Please check it. Are you interested in alternative implementation of htmlStringTrim? — Mr.Wizard, May 27 '15 at 13:32
@Mr.Wizard performance is not so important in dealing with that bug I think, since there will limited number of style will be in a string, considering Inline style of css. — HyperGroups, May 27 '15 at 14:06

score 1 · Accepted Answer · answered May 27 '15 at 13:31

1

I think this matches what you want it to:

str11 = "<strong style=\"font-size:20px\" style=\"color:#dfa57c\" 
  style=\"font-size:20px\" style=\"color:#dfa57c\" class=\"new\">";

StringCases[str11, ("style=\"" ~~ Except["\""] .. ~~ "\"" ~~ Whitespace | "") ..]

{"style=\"font-size:20px\" style=\"color:#dfa57c\" 
 style=\"font-size:20px\" style=\"color:#dfa57c\" "}

answered May 27 '15 at 13:31

Mr.Wizard

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nice, the use of Except is important where I should make progress. – HyperGroups May 27 '15 at 13:57

Dealing Repeated pattern in StringReplace

A problem about StringReplace

1 Answers1