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Want to transition from web development to Android development?
Learning Android development will help you publish your first app. Thanks to Kotlin, it's fun too!
Here's a full Kotlin tutorial just for you awesome JavaScript developers!
Learning Android development will help you publish your first app. Thanks to Kotlin, it's fun too!
Here's a full Kotlin tutorial just for you awesome JavaScript developers!
Okay, first things first.
Kotlin is a statically-typed, general-purpose, cross-platform language that compiles to byte-code for the JVM.
It was designed to fully interop with Java.
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Kotlin is a statically-typed, general-purpose, cross-platform language that compiles to byte-code for the JVM.
It was designed to fully interop with Java.
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While being statically-typed, Kotlin does have type inference - something that Java doesn't have.
Overall, Kotlin is a very concise and expressive language, especially compared to Java.
Alright, now let's get on with the guide!
Here's an example of some comments:
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Overall, Kotlin is a very concise and expressive language, especially compared to Java.
Alright, now let's get on with the guide!
Here's an example of some comments:
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Now we're going to look at variables and variable types.
Variables are easy to declare in Kotlin. Here's an example.
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Variables are easy to declare in Kotlin. Here's an example.
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There are 9 basic types for variables (discounting arrays).
Integers:
- Byte
- Short
- Integer
- Long
Decimals:
- Float
- Double
Other:
- Boolean
- String
- Char
Read the details about these types here: https://kotlinlang.org/docs/reference/basic-types.html
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Integers:
- Byte
- Short
- Integer
- Long
Decimals:
- Float
- Double
Other:
- Boolean
- String
- Char
Read the details about these types here: https://kotlinlang.org/docs/reference/basic-types.html
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There's also null safety built-in to Kotlin. Read more about it here: https://kotlinlang.org/docs/reference/null-safety.html
Here's some examples:
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Here's some examples:
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Now let's talk about arrays and lists.
You'll find that the syntax for both arrays and lists is simple and expressive.
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You'll find that the syntax for both arrays and lists is simple and expressive.
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There are a few different types of Arrays in Kotlin.
Here's the generic Array type in Kotlin that can hold any value:
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Here's the generic Array type in Kotlin that can hold any value:
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And then there's special array types to prevent boxing/unboxing of primitives:
- ByteArray
- ShortArray
- IntArray
- FloatArray
- DoubleArray
Example:
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- ByteArray
- ShortArray
- IntArray
- FloatArray
- DoubleArray
Example:
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Lists are similar to arrays in the way they are handled.
Here's an example:
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Here's an example:
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Next up are control structures, like if statements, loops, and a special one - when.
First let's look at some if statements. These are similar to the ones in JavaScript, with a few differences:
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First let's look at some if statements. These are similar to the ones in JavaScript, with a few differences:
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Loops are interesting in Kotlin. They are more similar to the loops in Python than JavaScript.
Let's look at for loops first:
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Let's look at for loops first:
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Now let's look at while loops and do-while loops, which aren't very different from Java or JavaScript.
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Finally, there's the when statement, which serves the same purpose as a switch statement.
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Now we're gonna look at functions.
Like JavaScript, functions are first class citizens in Kotlin, which is a luxury that Java developers unfortunately don't enjoy.
Let's look at some examples.
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Like JavaScript, functions are first class citizens in Kotlin, which is a luxury that Java developers unfortunately don't enjoy.
Let's look at some examples.
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Okay, that's all for today. I hit my tweet limit for threads 
.
Tomorrow we'll discuss OOP in Kotlin and the paradigm shift from prototype-based OOP and class-based OOP.
Happy coding! (in Kotlin hopefully!)
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.Tomorrow we'll discuss OOP in Kotlin and the paradigm shift from prototype-based OOP and class-based OOP.
Happy coding! (in Kotlin hopefully!)
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