BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Comparing Sets of Data          BorlandTalk.com Forum Index -> Delphi (General) View previous topic :: View next topic   Author Message Aaron Gitlin Guest Posted: Wed Mar 03, 2004 10:30 pm    Post subject: Comparing Sets of Data Hello all - I have two sets of data in text files - both set of data are phone numbers. I need to find like phone numbers in each file and return them. What are your opinions on the best way to do this? I was thinking either client data sets or some sort of nasty string compare loop. Any ideas? Thanks in advance! Aaron Back to top Karel de Andere Guest Posted: Thu Mar 04, 2004 12:50 am    Post subject: Re: Comparing Sets of Data "Aaron Gitlin" <aaron (AT) accent-networks (DOT) com> schreef in bericht news:S7udnVuKM-YKwdvdRVn-hw (AT) mpowercom (DOT) net... Quote: Hello all - I have two sets of data in text files - both set of data are phone numbers. I need to find like phone numbers in each file and return them. What are your opinions on the best way to do this? I was thinking either client data sets or some sort of nasty string compare loop. Any ideas? Thanks in advance! Aaron Perhaps you could read them as strings (TStrings.LoadFromFile), sort them, walk through the shortest list and do a binary search on the other. Back to top Aaron Gitlin Guest Posted: Thu Mar 04, 2004 6:32 am    Post subject: Re: Comparing Sets of Data Thanks for the feedback Karel. That was one of my options. These text files are HUGE. We're talking 80K records. Hopefully the process won't take 8 years! -=) "Karel de Andere" <kdan (AT) slimvisje (DOT) nl> wrote Quote: "Aaron Gitlin" <aaron (AT) accent-networks (DOT) com> schreef in bericht news:S7udnVuKM-YKwdvdRVn-hw (AT) mpowercom (DOT) net... Hello all - I have two sets of data in text files - both set of data are phone numbers. I need to find like phone numbers in each file and return them. What are your opinions on the best way to do this? I was thinking either client data sets or some sort of nasty string compare loop. Any ideas? Thanks in advance! Aaron Perhaps you could read them as strings (TStrings.LoadFromFile), sort them, walk through the shortest list and do a binary search on the other. Back to top Karel de Andere Guest Posted: Thu Mar 04, 2004 10:59 am    Post subject: Re: Comparing Sets of Data "Aaron Gitlin" <aaron (AT) accent-networks (DOT) com> schreef in bericht news:ydmdnZuBE_XyUNvdRVn-hg (AT) mpowercom (DOT) net... Quote: Thanks for the feedback Karel. That was one of my options. These text files are HUGE. We're talking 80K records. Hopefully the process won't take 8 years! -=) "Karel de Andere" <kdan (AT) slimvisje (DOT) nl> wrote in message news:40467ce5$0$562$e4fe514c (AT) news (DOT) xs4all.nl... "Aaron Gitlin" <aaron (AT) accent-networks (DOT) com> schreef in bericht news:S7udnVuKM-YKwdvdRVn-hw (AT) mpowercom (DOT) net... Hello all - I have two sets of data in text files - both set of data are phone numbers. I need to find like phone numbers in each file and return them. What are your opinions on the best way to do this? I was thinking either client data sets or some sort of nasty string compare loop. Any ideas? Thanks in advance! Aaron Perhaps you could read them as strings (TStrings.LoadFromFile), sort them, walk through the shortest list and do a binary search on the other. Then consider FileStreams instead of Strings. But then all the records have to be of the same size and you have to implement a sort method yourself. Back to top Aaron Gitlin Guest Posted: Thu Mar 04, 2004 7:07 pm    Post subject: Re: Comparing Sets of Data Gotcha. Thank you very much for your help, Karel! -A "Karel de Andere" <kdan (AT) slimvisje (DOT) nl> wrote Quote: "Aaron Gitlin" <aaron (AT) accent-networks (DOT) com> schreef in bericht news:ydmdnZuBE_XyUNvdRVn-hg (AT) mpowercom (DOT) net... Thanks for the feedback Karel. That was one of my options. These text files are HUGE. We're talking 80K records. Hopefully the process won't take 8 years! -=) "Karel de Andere" <kdan (AT) slimvisje (DOT) nl> wrote in message news:40467ce5$0$562$e4fe514c (AT) news (DOT) xs4all.nl... "Aaron Gitlin" <aaron (AT) accent-networks (DOT) com> schreef in bericht news:S7udnVuKM-YKwdvdRVn-hw (AT) mpowercom (DOT) net... Hello all - I have two sets of data in text files - both set of data are phone numbers. I need to find like phone numbers in each file and return them. What are your opinions on the best way to do this? I was thinking either client data sets or some sort of nasty string compare loop. Any ideas? Thanks in advance! Aaron Perhaps you could read them as strings (TStrings.LoadFromFile), sort them, walk through the shortest list and do a binary search on the other. Then consider FileStreams instead of Strings. But then all the records have to be of the same size and you have to implement a sort method yourself. 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