DaWei

If you succeeded in losslessly compressing a file, you removed redundancy, whether you recognized it or not. If you remove anything which isn't redundant (available elsewhere in the information), then the removal wasn't lossless. If you store or find stored non-redundant information in another place (a recoverable "random" number, say) and add it back later, it isn't compression, it's reorganization.

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Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code.
Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers