35 lines
1.2 KiB
Markdown
35 lines
1.2 KiB
Markdown
# Run Length Encoding
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Implement run-length encoding and decoding.
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Run-length encoding (RLE) is a simple form of data compression, where runs
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(consecutive data elements) are replaced by just one data value and count.
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For example we can represent the original 53 characters with only 13.
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```text
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"WWWWWWWWWWWWBWWWWWWWWWWWWBBBWWWWWWWWWWWWWWWWWWWWWWWWB" -> "12WB12W3B24WB"
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```
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RLE allows the original data to be perfectly reconstructed from
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the compressed data, which makes it a lossless data compression.
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```text
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"AABCCCDEEEE" -> "2AB3CD4E" -> "AABCCCDEEEE"
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```
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For simplicity, you can assume that the unencoded string will only contain
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the letters A through Z (either lower or upper case) and whitespace. This way
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data to be encoded will never contain any numbers and numbers inside data to
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be decoded always represent the count for the following character.
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## Source
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Wikipedia [https://en.wikipedia.org/wiki/Run-length_encoding](https://en.wikipedia.org/wiki/Run-length_encoding)
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## Version compatibility
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This exercise has been tested on Julia versions >=1.0.
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## Submitting Incomplete Solutions
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It's possible to submit an incomplete solution so you can see how others have completed the exercise.
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