Removing duplicates record from a file

[diva]

hi all

I am writing a file,"abc" but my data has duplicates. Is there anyway to write only the unique record to the file. also I have to read this file in my program if only unique record can not be written , Is there any function to read only the unique record from file.

Please help me

Thanks

[mahlerfive]

How is your data stored before you put it in the file? If your data is stored in some sort of array or list, you can write a function that will eliminate the duplicates from the list first, then write the list to file.