Created
October 18, 2020 00:33
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find first duplicate character in string
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| function findDupe(str) { | |
| let hash = {} | |
| for (let x of str) { | |
| hash[x] ? hash[x] += 1 : hash[x] = 1; | |
| if (hash[x] === 2) return x | |
| } | |
| } |
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