Use reduce to deduplicate arrays and array objects

Use reduce to deduplicate array objects_reduce array objects to deduplicate_laishaojiang's blog-CSDN blog Ordinary array deduplication, there are many methods, such as shortcut methods such as es6 is Set, Map, etc., but for array objects, these methods are Not applicable, the traditional forEach, filter, etc. are a bit cumbersome. A new method is introduced here—reduce() first look at the grammar introduction array.reduce(function(previousValue, currentValue, index, array), initialValue)..._reduce array object deduplication https://blog.csdn.net /laishaojiang/article/details/102819920