👋Learning to code? Check out ourbrand new Bootcampfor beginners!
Determine if a word or phrase is an isogram.
An isogram (also known as a "non-pattern word") is a word or phrase without a repeating letter, however spaces and hyphens are allowed to appear multiple times.
Examples of isograms:
The word isograms, however, is not an isogram, because the s repeats.
Edit via GitHub
Sign up to Exercism to learn and master PHP with 11 concepts, 110 exercises, and real human mentoring, all for free.
