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Contents

# Run Length Encoding

Implement run-length encoding and decoding.

Run-length encoding (RLE) is a simple form of data compression, where runs
(consecutive data elements) are replaced by just one data value and count.

For example we can represent the original 53 characters with only 13.

```text
"WWWWWWWWWWWWBWWWWWWWWWWWWBBBWWWWWWWWWWWWWWWWWWWWWWWWB"  ->  "12WB12W3B24WB"
```

RLE allows the original data to be perfectly reconstructed from
the compressed data, which makes it a lossless data compression.

```text
"AABCCCDEEEE"  ->  "2AB3CD4E"  ->  "AABCCCDEEEE"
```

For simplicity, you can assume that the unencoded string will only contain
the letters A through Z (either lower or upper case) and whitespace. This way
data to be encoded will never contain any numbers and numbers inside data to
be decoded always represent the count for the following character.

## Elm Installation

Refer to the [Exercism help page](http://exercism.io/languages/elm) for Elm
installation and learning resources.

## Writing the Code

The first time you start an exercise, you'll need to ensure you have the
appropriate dependencies installed.

```bash
$ elm-package install --yes
```

Execute the tests with:

```bash
$ elm-test
```

Automatically run tests again when you save changes:

```bash
$ elm-test --watch
```

As you work your way through the test suite, be sure to remove the `skip <|`
calls from each test until you get them all passing!

## Source

Wikipedia [https://en.wikipedia.org/wiki/Run-length_encoding](https://en.wikipedia.org/wiki/Run-length_encoding)

## Submitting Incomplete Solutions
It's possible to submit an incomplete solution so you can see how others have completed the exercise.

Version data entries

68 entries across 68 versions & 1 rubygems

Version Path
trackler-2.2.1.180 tracks/elm/exercises/run-length-encoding/README.md
trackler-2.2.1.179 tracks/elm/exercises/run-length-encoding/README.md
trackler-2.2.1.178 tracks/elm/exercises/run-length-encoding/README.md
trackler-2.2.1.177 tracks/elm/exercises/run-length-encoding/README.md
trackler-2.2.1.176 tracks/elm/exercises/run-length-encoding/README.md
trackler-2.2.1.175 tracks/elm/exercises/run-length-encoding/README.md
trackler-2.2.1.174 tracks/elm/exercises/run-length-encoding/README.md
trackler-2.2.1.173 tracks/elm/exercises/run-length-encoding/README.md
trackler-2.2.1.172 tracks/elm/exercises/run-length-encoding/README.md
trackler-2.2.1.171 tracks/elm/exercises/run-length-encoding/README.md
trackler-2.2.1.170 tracks/elm/exercises/run-length-encoding/README.md
trackler-2.2.1.169 tracks/elm/exercises/run-length-encoding/README.md
trackler-2.2.1.167 tracks/elm/exercises/run-length-encoding/README.md
trackler-2.2.1.166 tracks/elm/exercises/run-length-encoding/README.md
trackler-2.2.1.165 tracks/elm/exercises/run-length-encoding/README.md
trackler-2.2.1.164 tracks/elm/exercises/run-length-encoding/README.md
trackler-2.2.1.163 tracks/elm/exercises/run-length-encoding/README.md
trackler-2.2.1.162 tracks/elm/exercises/run-length-encoding/README.md
trackler-2.2.1.161 tracks/elm/exercises/run-length-encoding/README.md
trackler-2.2.1.160 tracks/elm/exercises/run-length-encoding/README.md