Created
March 14, 2019 15:29
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| import functools | |
| def merge_or_append(ranges, element): | |
| if ranges and ranges[-1][0] <= element[0] <= ranges[-1][1]: | |
| ranges[-1] = (ranges[-1][0], max(ranges[-1][1], element[1])) | |
| else: | |
| ranges.append(element) | |
| return ranges | |
| def merge(ranges): | |
| if not ranges or len(ranges) == 1: | |
| return ranges | |
| sorted_ranges = sorted(ranges) | |
| result = [sorted_ranges[0]] | |
| for element in sorted_ranges[1:]: | |
| merge_or_append(result, element) | |
| return result | |
| def merge_reduce(ranges): | |
| if not ranges or len(ranges) == 1: | |
| return ranges | |
| return functools.reduce(merge_or_append, sorted(ranges), []) |
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