Created
February 2, 2016 06:55
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js array sort by two propertys
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| comparator: (prev,next) -> | |
| return 1 if prev.get('page_number') > next.get('page_number') | |
| return -1 if prev.get('page_number') < next.get('page_number') | |
| if prev.get('page_number') is next.get('page_number') | |
| return prev.get('number') - next.get('number') | |
| return 0 |
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