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# Isogram

Determine if a word or phrase is an isogram.

An isogram (also known as a "nonpattern word") is a word or phrase without a repeating letter, however spaces and hyphens are allowed to appear multiple times.

Examples of isograms:

- lumberjacks
- background
- downstream
- six-year-old

The word *isograms*, however, is not an isogram, because the s repeats.

## Installation
See [this guide](https://github.com/exercism/xr/blob/master/docs/INSTALLATION.md) for instructions on how to setup your local R environment.

## How to implement your solution
In each problem folder, there is a file named `<exercise_name>.R` containing a function that returns a `NULL` value. Place your implementation inside the body of the function.

## How to run tests
Inside of RStudio, simply execute the `test_<exercise_name>.R` script. This can be conveniently done with [testthat's `auto_test` function](https://www.rdocumentation.org/packages/testthat/topics/auto_test). Because exercism code and tests are in the same folder, use this same path for both  `code_path` and `test_path` parameters. On the command-line, you can also run `Rscript test_<exercise_name>.R`.

## Source

Wikipedia [https://en.wikipedia.org/wiki/Isogram](https://en.wikipedia.org/wiki/Isogram)

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

Version data entries

74 entries across 74 versions & 1 rubygems

Version Path
trackler-2.2.1.119 tracks/r/exercises/isogram/README.md
trackler-2.2.1.118 tracks/r/exercises/isogram/README.md
trackler-2.2.1.117 tracks/r/exercises/isogram/README.md
trackler-2.2.1.116 tracks/r/exercises/isogram/README.md
trackler-2.2.1.115 tracks/r/exercises/isogram/README.md
trackler-2.2.1.114 tracks/r/exercises/isogram/README.md
trackler-2.2.1.113 tracks/r/exercises/isogram/README.md
trackler-2.2.1.111 tracks/r/exercises/isogram/README.md
trackler-2.2.1.110 tracks/r/exercises/isogram/README.md
trackler-2.2.1.109 tracks/r/exercises/isogram/README.md
trackler-2.2.1.108 tracks/r/exercises/isogram/README.md
trackler-2.2.1.107 tracks/r/exercises/isogram/README.md
trackler-2.2.1.106 tracks/r/exercises/isogram/README.md
trackler-2.2.1.105 tracks/r/exercises/isogram/README.md