This is great, though it’s duplicating Z on the first pass.
iex(11)> generate_list("W", 10)
["W", "X", "Y", "ZZ", "AA", "BB", "CC", "DD", "EE", "FF"]
I changed div(index, 25) to div(index, 26) and the problem is solved. It correctly appends additional characters too:
iex(15)> generate_list("W", 10)
["W", "X", "Y", "Z", "AA", "BB", "CC", "DD", "EE", "FF"]
iex(20)> generate_list("ZZ", 60)
["ZZ", "AAA", "BBB", "CCC", "DDD", "EEE", "FFF", "GGG", "HHH", "III", "JJJ", "KKK", "LLL", "MMM", "NNN", "OOO", "PPP", "QQQ", "RRR", "SSS", "TTT", "UUU", "VVV", "WWW", "XXX", "YYY", "ZZZ", "AAAA", "BBBB", "CCCC", "DDDD", "EEEE", "FFFF", "GGGG", "HHHH", "IIII", "JJJJ", "KKKK", "LLLL", "MMMM", "NNNN", "OOOO", "PPPP", "QQQQ", "RRRR", "SSSS", "TTTT", "UUUU", "VVVV", "WWWW", ...]
Thank you @blatyo for this clean solution!
