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How to sort a Scala Map by key

Last Updated : 13 Aug, 2019
Map is same as dictionary which holds key:value pairs. In this article, we will learn how to sort a Scala Map by key. We can sort the map by key, from low to high or high to low, using sortBy. Syntax : 
mapName.toSeq.sortBy(_._1):_*
Let's try to understand it with better example. Example #1:
Output: 
Map(Charlie -> 50, Jhavesh -> 20, Zash -> 30)
Example #2:
Output: 
Map(Charlie -> 50, Jhavesh -> 20, Zash -> 30)
Example #3:
Output: 
Map(Zash -> 30, Jhavesh -> 20, Charlie -> 50)
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