Longest Session Without Repeats

Mediumsliding windowhash map 00:00

A session is a string of page codes (characters). Return the length of the longest contiguous stretch with no repeated character.

longestUnique(s: string) → int

Example 1

s = "abcabcbb"

output = 3

'abc' → 3

Example 2

s = "pwwkew"

output = 3

'wke' → 3

Example 3

s = ""

output = 0

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