18 lines
468 B
Crystal
18 lines
468 B
Crystal
def substring_demo(string, n, m, known_character, known_substring)
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n -= 1
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puts string[n...n+m]
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puts string[n...]
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puts string.rchop
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known_character_index = string.index(known_character).not_nil!
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puts string[known_character_index...known_character_index+m]
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known_substring_index = string.index(known_substring).not_nil!
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puts string[known_substring_index...known_substring_index+m]
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end
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substring_demo("crystalline", 3, 5, 't', "st")
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