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manzaloros/summaryRanges.js

Last active October 28, 2020 15:48
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summaryRanges.js
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summaryRanges.js
const summaryRanges = (nums, [beginning, end] = [nums[0]]) => {
return nums.reduce((result, curr, i) => {
const next = nums[i + 1];
if (curr + 1 !== (next)) {
result.push(end === beginning ? `${end}` : `${beginning}->${end}`);
beginning = next;
}
end = next;
return result;
}, []);
}
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