Theo như trong hình này thì e chỉ muốn để lại [a,3][b,3][c,3] thôi, em cảm ơn.
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Theo như trong hình này thì e chỉ muốn để lại [a,3][b,3][c,3] thôi, em cảm ơn.
val listOfList = listOf( listOf("a", 1), listOf("a", 2), listOf("a", 3), listOf("b", 1), listOf("b", 2), listOf("b", 3), listOf("c", 1), listOf("c", 2), listOf("c", 3) ) val filteredList = listOfList .groupBy { it[0] } .map { group -> listOf( group.key, group.value.maxOf { it[1] as Int } ) } println(filteredList)
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