Web Reference: Implement a function that determines whether a string that contains only letters is an isogram. Assume the empty ... Isograms An isogram is a word that has no repeating letters, consecutive or non-consecutive. Implement a function that determines whether a string that contains only letters is an isogram. Assume the empty string is an isogram. Ignore letter case. Example Jun 20, 2016 · Casting the string into a set will drop the duplicate characters, causing isograms to return as True, as the length of the set won't differ from the length of the original string:
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