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exercism fetch swift isogram

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.

Examples of isograms:

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

Setup

Go through the project setup instructions for Xcode using Swift:

http://exercism.io/languages/swift

Source

Wikipedia 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.