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How Zip Files Shrink Without Losing Data!🗃️ A 1 GB folder zips down to 400 MB and unzips back to the full 1 GB. The method behind it is Huffman coding. In the word BANANA, A appears three times, N twice and B once, yet a computer spends 8 bits on every letter, 48 bits in total. Huffman gives the most frequent letter the shortest code: A becomes 0, B becomes 10, N becomes 11. The same word now fits in 9 bits, and every letter is still there. Did you think zip deleted something to save space? Yes
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