3 Презентация kotlin - why not?
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Why not?
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Why Kotlin
• Simple• IDE• Compatible with Java• Concise• Null-safety
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Variables and data types
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Unit
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Functions
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Functions
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Android extensions
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Classes and Inheritance
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With Kotlin, you can do more with less code
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With Kotlin, you can do more with less code
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You can avoid NullPointerException
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You can avoid NullPointerException
Elvis-operator
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You can get rid of util classes
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Collections in Kotlin
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Creation (Immutable)
• listOf(1, 2, 3)• mapOf(1 to “A”, 2 to “B”)• setOf(“One”, “Two”, “Three”)
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Creation (Mutable)
• mutableListOf(1, 2, 3)• mutableMapOf(1 to “A”, 2 to “B”)• mutableSetOf(“One”, “Two”, “Three”)
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any
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all
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count
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fold
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forEach forEachIndexed
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filter, filterNot, filterNotNull
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map and flatMap
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You can work with collections much more easily
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You can work with collections much more easily
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You can forget about view binding
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Lambdas and high-order functions
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Inline functions
• let
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Inline functions
• with
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Inline functions
• apply
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https://kotlinlang.org/