CODEWITHSUNDEEP
stringlistscaladatesorting
user2506494
user2506494

Reputation: 43

Need efficient way to sort list of strings (dates) in Scala. (Avoiding the darkness of Java.)

I'm looking for a functional way to sort Dates in Scala. The dates come in as a list of strings and need to return as a sorted list of strings. The list of strings are of these formats:

"dd MMM yyyy"
"MMM yyyy"
"yyyy"
""

I have tried setting up a regex to parse for the day, month, and year. I would then put them into year month day and use the .sorted . This would however place 1 before 10 and couldn't handle the months. Jan, Feb, ...

I then tried converting the strings into date classes but I couldn't find any way to sort them.

I have a considerable amount of data to sort. That would be the only consideration.

Thank you, Erick

Upvotes: 3

Views: 7395

Answers (1)

cmbaxter
cmbaxter

Reputation: 35463

If you can correctly convert the list of String to a List[Date], then you are really close. From there, assuming the list is called list, you can sort by the epoch time of the dates:

  list.sortBy(_.getTime)

Upvotes: 4

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