14 lines
263 B
JavaScript
14 lines
263 B
JavaScript
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/**
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* @param {number[]} nums
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* @return {boolean}
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*/
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var containsDuplicate = function(nums) {
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let exists = {};
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return nums.some(n => {
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if (exists[n]) {
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return true;
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}
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exists[n] = true;
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return false;
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});
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};
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