Android Kotlin sorting by collator

Question

I want to sort a list of objects based on one field(player.name), but in Spanish there are accents that don't have to be taken into account when ordering.

I sort the list:

strikers.sortedWith(compareBy { it.name })

But I have no idea how to apply to the above sorting

val spanishCollator = Collator.getInstance(Locale("es", "ES"))

How can I achieve this?

Ilya · Accepted Answer · 2018-12-22 15:28:53Z

17

Collator class implements Comparator interface, so you can use it to compare names as following:

strikers.sortedWith(compareBy(spanishCollator) { it.name })

Here we use it as a comparator argument of compareBy function overload, that takes both the value selector { it.name } and the comparator spanishCollator that compares these values.

answered Dec 22, 2018 at 15:28

Ilya

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Comments

phatnhse · Accepted Answer · 2018-12-21 09:40:18Z

11

Something like this?

val spanishCollator = strikers.sortedWith(Comparator { s1, s2 ->
                Collator.getInstance(Locale("es", "ES")).compare(s1,s2)
            })

answered Dec 21, 2018 at 9:40

phatnhse

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3 Comments

niegus Over a year ago

I've modified it a little bit, but that is what I wanted. strikers.sortedWith(Comparator { player1, player2 -> Collator.getInstance(Locale("es", "ES")).compare(player1.name, player2.name) })

phatnhse Over a year ago

I'm glad that it helps you ^^

Ilya Over a year ago

You're creating a new instance of Locale for every two strings compared, seems not a very efficient solution.

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