Javascript Disabled Detected

You currently have javascript disabled. Several functions may not work. Please re-enable javascript to access full functionality.

Removing lines from a file

Started by Guest_NeedHelp_* , Nov 01 2006 10:03 AM

This topic has been archived. This means that you cannot reply to this topic.

1 reply to this topic

#1
Guest_NeedHelp_*

Posted 01 November 2006 - 10:03 AM

Guests

I have to remove certain lines from a file. I file may look like this:

E2EDL37005 123244544-data-data-data
E2EDL44 123123123-data-data-data
E2EDL37005 123244544-data-data-data
E2EDL44 ........

What I need to do is remove the second occurrence of E2EDL37005 if the characters beside it are the same as the first.

Also, this must be written in Linux C++ and I have no idea where to start. Can anyone point me in the right direction?

#2
WingedPanther

Posted 01 November 2006 - 10:10 AM

A spammer's worst nightmare

Moderators
16,831 posts

perhaps read the text in one line at a time, parse the line into header and data. Store them in a data structure (say a map of <string,set<string>>?) and check for duplication before writing. Obviously, for a large file this could get obnoxious.

Programming is a branch of mathematics.
My CodeCall Blog | My Personal Blog

Back to C and C++