Collection: Sorting a collection of objects based on a parameter in the object - devrath/KotlinAlchemy GitHub Wiki

Observation This is handy instead of using the comparator where kotlin does this out of the box

Code

data class Country(val id : Int, val name: String, val isDemocracy: Boolean)
val countriesList = mutableListOf(
    Country(id = 1, name = "USA", isDemocracy = true),
    Country(id = 2, name = "Australia", isDemocracy = true),
    Country(id = 3, name = "Russia", isDemocracy = false),
    Country(id = 4, name = "England", isDemocracy = true),
    Country(id = 5, name = "North Korea", isDemocracy = false),
)


fun main(args: Array<String>) {

    countriesList.sortBy {
       it.name
    }

    countriesList.forEach {
        println(it.name)
    }

}

Output

Australia
England
North Korea
Russia
USA

kotlin

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