Kotlin Collection (Array)

The main type of collection

(1)Immutable collection = Can’t not be change (2) Mutable Collection = We can able to change

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1.1 listOf — read-only, immutable, fixed size

1.2 ArrayList, arrayListOf, mutableListOf

2.1 mapOf

2.2 HashMap, hashMapOf, mutableMapOf

3.1 setOf

3.2 mutableSetOf, hashSetOf