Android Development with Kotlin

Strings

Strings in Kotlin behave in a similar way as in Java, but they have a few nice improvements.

To start to access characters at a specified index, we can use the indexing operator and access characters the same way we access array elements:

    val str = "abcd" 
    println (str[1]) // Prints: b 

We also have access to various extensions defined in the Kotlin standard library, which make working with strings easier:

    val str = "abcd" 
    println(str.reversed()) // Prints: dcba 
    println(str.takeLast(2)) // Prints: cd 
    println("[e-mail]".substringBefore("@")) // Prints: john 
    println("[e-mail]".startsWith("@")) // Prints: false 

This is exactly the same String class as in Java, so these methods are not part of String class. They were defined ...