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magdamiu/Collections.kt

Created March 14, 2020 14:40
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Collections.kt
//first
//NoSuchElementException could be thrown
println(languagesList.first())
println(languagesList.first { it.name.length == 3 })
println(languagesList.firstOrNull { it.name.length == 2 })
//find
println(languagesList.find { it.town.equals("San Francisco") })
println(languagesList.findLast { it.town.equals("Bucharest") })
//last
println(languagesList.last())
println(languagesList.last { it.town.contains(' ') })
//single
//IllegalArgumentException if list has more than one element
println(languagesList.single{ it.town.equals("San Francisco")})
println(languagesList.singleOrNull{ it.town.equals("Pitesti")})
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