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c++.stlsoft - could string_tokeniser inlcude erase()?

reply "chenchang" <baibaichen sohu.com> writes:
Sometimes, the users may erase some items in delimited string.

Consider this case: say the user want to search semicolon delimited files in
a semicolon delimited directories, i.e. search "1.h;2.h" in
"f:\sourcecode\1;f:\sourcecode\2".

once the file is located, it should be deleted from semicolon delimited
files,  the code looks like:

typedef string_tokeniser<string,char> tokeniser;
tokeniser tokendirs("f:\sourcecode\1;f:\sourcecode\2",';');
tokeniser tokenfiles("1.h",';');

tokeniser::const_iterator dir = tokendirs.being();
tokeniser::const_iterator dirEnd = tokendirs.end();

for (; dir!= dirEnd && tokenfiles.size(); ++dir)
{
    string files = join(tokenfiles);  // i.e. get semicolon delimited
string.
    string strDir(*dir);
    findfile_sequence file_seq(strDir.c_str(), files.c_str(), ';',
findfile_sequence::files);

    findfile_sequence::const_iterator foundFile = file_seq.begin();
    findfile_sequence::const_iterator foundFileEnd    = file_seq.End();
   for (; foundFile!= foundFileEnd; ++foundFile)
  {
           string sFile((*foundFile).get_filename());
           tokeniser:: const_iterator  iFound =
find(tokenfiles.begin(),tokenfiles.end(),sFile);
           if (iFound != tokenfiles.end())
              tokefiles.erase(iFound);              // this function is
helpful!!!
  }
}

corrently , I split delimited string into vector for applying this way.

thanks
chang
Dec 05 2005
next sibling parent "Matthew" <matthew stlsoft.com> writes:
I'm not 100% sure what you're driving at, but I'm pretty sure it's not 
appropriate for a general-purpose class template like string_tokeniser. One 
of its important features is that it is very efficient - in fact I believe 
it's pretty much the fastest tokeniser available - and adding a feature to 
change the string being tokenised would complicate it, and likely reduce its 
performance characteristics.

But I'm very glad you're making good use of the libraries! ;-)



"chenchang" <baibaichen sohu.com> wrote in message 
news:dn15hr$hgk$1 digitaldaemon.com...
 Sometimes, the users may erase some items in delimited string.

 Consider this case: say the user want to search semicolon delimited files 
 in
 a semicolon delimited directories, i.e. search "1.h;2.h" in
 "f:\sourcecode\1;f:\sourcecode\2".

 once the file is located, it should be deleted from semicolon delimited
 files,  the code looks like:

 typedef string_tokeniser<string,char> tokeniser;
 tokeniser tokendirs("f:\sourcecode\1;f:\sourcecode\2",';');
 tokeniser tokenfiles("1.h",';');

 tokeniser::const_iterator dir = tokendirs.being();
 tokeniser::const_iterator dirEnd = tokendirs.end();

 for (; dir!= dirEnd && tokenfiles.size(); ++dir)
 {
    string files = join(tokenfiles);  // i.e. get semicolon delimited
 string.
    string strDir(*dir);
    findfile_sequence file_seq(strDir.c_str(), files.c_str(), ';',
 findfile_sequence::files);

    findfile_sequence::const_iterator foundFile = file_seq.begin();
    findfile_sequence::const_iterator foundFileEnd    = file_seq.End();
   for (; foundFile!= foundFileEnd; ++foundFile)
  {
           string sFile((*foundFile).get_filename());
           tokeniser:: const_iterator  iFound =
 find(tokenfiles.begin(),tokenfiles.end(),sFile);
           if (iFound != tokenfiles.end())
              tokefiles.erase(iFound);              // this function is
 helpful!!!
  }
 }

 corrently , I split delimited string into vector for applying this way.

 thanks
 chang


 

Dec 05 2005
prev sibling parent "Matthew" <matthew stlsoft.com> writes:
btw, if you're doing sophisticated file-system searching, check out 
http://recls.org/. The docs are no better than those of STLSoft, but the 
library's well-tested and pretty useful. ;-)

"chenchang" <baibaichen sohu.com> wrote in message 
news:dn15hr$hgk$1 digitaldaemon.com...
 Sometimes, the users may erase some items in delimited string.

 Consider this case: say the user want to search semicolon delimited files 
 in
 a semicolon delimited directories, i.e. search "1.h;2.h" in
 "f:\sourcecode\1;f:\sourcecode\2".

 once the file is located, it should be deleted from semicolon delimited
 files,  the code looks like:

 typedef string_tokeniser<string,char> tokeniser;
 tokeniser tokendirs("f:\sourcecode\1;f:\sourcecode\2",';');
 tokeniser tokenfiles("1.h",';');

 tokeniser::const_iterator dir = tokendirs.being();
 tokeniser::const_iterator dirEnd = tokendirs.end();

 for (; dir!= dirEnd && tokenfiles.size(); ++dir)
 {
    string files = join(tokenfiles);  // i.e. get semicolon delimited
 string.
    string strDir(*dir);
    findfile_sequence file_seq(strDir.c_str(), files.c_str(), ';',
 findfile_sequence::files);

    findfile_sequence::const_iterator foundFile = file_seq.begin();
    findfile_sequence::const_iterator foundFileEnd    = file_seq.End();
   for (; foundFile!= foundFileEnd; ++foundFile)
  {
           string sFile((*foundFile).get_filename());
           tokeniser:: const_iterator  iFound =
 find(tokenfiles.begin(),tokenfiles.end(),sFile);
           if (iFound != tokenfiles.end())
              tokefiles.erase(iFound);              // this function is
 helpful!!!
  }
 }

 corrently , I split delimited string into vector for applying this way.

 thanks
 chang


 

Dec 05 2005