record duplication in c++ [closed]

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Can anyone tell me how to delete duplicate records or avoid 开发者_运维知识库duplication in the first place?

The problem is that whenever I edit a record, a duplicate record is created.

Can anyone please send an answer??

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Try to use std::map or std::set collections. They don't store duplicates. Some containers have methods like unique() or you can just use unique() or unique_if() algorithms. By the way where do you duplicate records? Is it a problem with ado(.net) usage or maybe with some specific collection you use? Where do you see duplicated records? In memory, in db or maybe in some file?

Alek

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The general approach to avoiding duplicates, regardless of language, is to use a hashtable to store your records. This assumes there is a field which serves as a unique identifier. Doctor Dobb's Journal as an article on C++ and hashing.