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      Learn about the core concepts and basic building blocks of Kotlin.

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      Learn how to use collections in Kotlin.

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      Classes and Objects provide the foundation for all Kotlin development.

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Category upKotlin

Kotlin Collections

Learn about the Kotlin Collections and implementations for Lists, Maps, and Sets. Learn how to work with Kotlin Collections through the guides below.

  • List (54)
  • Map (24)
  • Set (5)
  • Sorting (5)
  • JSON (3)
  • Sequence (3)
  • Math (2)
  • Data Class (2)
  • String Conversions (2)

>> Guide to Merging Two Maps in Kotlin

>> Convert Array to Set and Vice-Versa in Kotlin

>> any() vs. none() vs. all() in Kotlin

>> Converting a List of Maps to a Map Grouped by Key in Kotlin

>> Creating a Map from Two Arrays in Kotlin

>> Counting Occurrences of a Value in a List in Kotlin

>> Skip Null Values When Converting a List to a Map in Kotlin

>> How to Change a Value in a Mutable List in Kotlin

>> How to Initialize a List of Lists in Kotlin

>> How to Remove Null and Empty Values from a List in Kotlin

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