Scala: From string to tuple

Question

I am very naive in programming as well as in scala. I have a file with following content:

football type game
John comment "football is the best game"

I want to make it tuple like this

(football, type, game)
(John, comment, "football is the best game")

Could somebody tell me how can I do that in scala.

What have you tried? Show your code attempts and we can help correct any misconceptions. — jwvh
– jwvh, Commented Jan 23, 2017 at 5:16
fileLines.map { line => { val lineSplit = line.split(" ") (lineSplit(0), lineSplit(1), lineSplit(2)) } } But the problem with 3rd field of tuple. — Mahmud
– Mahmud, Commented Jan 23, 2017 at 5:20
Instead of just using the third element from the array, just concatenate everything after the first two elements, and use that as the third field of the tuple — puhlen
– puhlen, Commented Jan 23, 2017 at 6:01
So, does this file have more lines besides these 2? Can we have quoted elements anywhere or just in the third position? Can there be quotes inside quotes? — nmat
– nmat, Commented Jan 23, 2017 at 6:12
This file has thousands of lines but the structure is similar. Quoted elements are in the third position only. — Mahmud
– Mahmud, Commented Jan 23, 2017 at 6:21

jwvh · Accepted Answer · 2017-01-23 06:14:51Z

3

Your question is a bit vague. If the multi-word string is limited to 3rd element of the tuple, it can be accomplished like so:

fileLines.map { line =>
  val lineSplit = line.split(" ")
  (lineSplit(0), lineSplit(1), lineSplit.drop(2).mkString(" "))
}

But if the quote-delimited string can happen for any of the three tuple members then you've got a lot more processing involved. I think I'd be tempted to split the entire string and then do a search for any elements with a single quote mark and then try to match them. Not trivial.

answered Jan 23, 2017 at 6:14

jwvh

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