Kotlin 1.3.70
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Overview
Kotlin for Server Side
Kotlin for Android
Kotlin for JavaScript
Kotlin for Native
Kotlin for Data Science
Coroutines
Multiplatform
What's New
What's New in 1.3
What's New in 1.2
What's New in 1.1
Getting Started
Basic Syntax
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Coding Conventions
Basics
Basic Types
Packages and Imports
Control Flow
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Classes and Inheritance
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Functions
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Collections
Collections Overview
Constructing Collections
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Operations Overview
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Filtering
Plus and Minus Operators
Grouping
Retrieving Collection Parts
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Ordering
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Map Specific Operations
Coroutines
Coroutines Guide
Basics
Cancellation and Timeouts
Composing Suspending Functions
Coroutine Context and Dispatchers
Asynchronous Flow
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Exception Handling and Supervision
Shared Mutable State and Concurrency
Select Expression (experimental)
Multiplatform Programming
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Destructuring Declarations
Type Checks and Casts
This expressions
Equality
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Opt-in Requirements
Core Libraries
Standard Library
kotlin.test
Reference
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Grammar
Java Interop
Calling Java from Kotlin
Calling Kotlin from Java
JavaScript
Setting Up a Project
Dynamic Type
Calling JavaScript from Kotlin
Calling Kotlin from JavaScript
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Concurrency
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Documenting Kotlin Code
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Coding Conventions
Evolution
Kotlin Evolution
Stability of different components
Compatibility Guide for Kotlin 1.3
FAQ
FAQ
Comparison to Java
kotlin-stdlib / kotlin.collections / LinkedHashMap / size

size

Common
1.0
val size: Int
JS
1.1
open val size: Int

Returns the number of key/value pairs in the map.

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Licensed under the Apache 2 license
Kotlin Trademark is protected under the Kotlin Foundation
Sponsored and developed by JetBrains
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