[Qt-interest] QRegExp and tab-delimited text

[Atlant Schmidt]

Robert:

>    QRegExp xx("*[\\t]*");

  Remember, in RegExp language, "*" doesn't mean "wildcard match".
  Instead, it's a "quantifier", specifying that the previous RegExp
  atom must match 0 to infinite number of times. To get the wildcard
  match you're probably looking for, use ".*" (Match any character
  and (quantifier) match that any number of times in a row).

  So your whole RegExp becomes:

    ".*[\\t].*");

                                Atlant


-----Original Message-----
From: qt-interest-bounces+aschmidt=dekaresearch.com at qt.nokia.com [mailto:qt-interest-bounces+aschmidt=dekaresearch.com at qt.nokia.com] On Behalf Of Robert Hairgrove
Sent: Monday, February 07, 2011 06:16
To: Qt Interest
Subject: [Qt-interest] QRegExp and tab-delimited text

I'm trying to auto-detect tab-delimited text and am having trouble with
the simplest of regular expressions:

    //-------------------------------
    // This doesn't work:
    //-------------------------------
    QRegExp xx("*[\\t]*");
    QRegExp yy("*[\\t][\\t]*");
    int fa = xx.indexIn(first_row);
    int fb = yy.indexIn(first_row);
    //-------------------------------
    // This works:
    //-------------------------------
    int f1 = first_row.indexOf('\t');
    int f2 = first_row.indexOf("\t\t");
    //-------------------------------
    if ((f1>=0)||(f2>=0)) {
    // etc.

Can anybody point out the obvious to me, please?


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