Created
April 17, 2019 06:04
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| function countUniqueString(arr){ | |
| const lookup = {}; | |
| for (let letter of arr) { | |
| // if letter exists, increment, otherwise set to 1 | |
| lookup[letter] ? lookup[letter] += 1 : lookup[letter] = 1; | |
| } | |
| return Object.keys(lookup); | |
| } | |
| countUniqueString('aabbbbbcccdefffff') |
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