Re^5: Extract the odd and even columns seperately in the hash of arrays or some other data structure apart from arrays

How many unique IDs are there in those 1 million records?

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Comment on Re^5: Extract the odd and even columns seperately in the hash of arrays or some other data structure apart from arrays

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Re^6: Extract the odd and even columns seperately in the hash of arrays or some other data structure apart from arrays by snape (Pilgrim) on Jan 26, 2010 at 22:40 UTC
yeah there can be 1 million unique ids or may be there can be 500,000 ids where each id is repeated twice. In some cases I need to match the same ids also and in some cases I have to match the rows having same ids with the other rows i.e. the first row having a id 1 with first and second row having a id 2. Similarly, the second row having a id 1 with first and second row having a id 2. Thanks.	[reply]