Programming Kotlin

Function Fluency with infix

Dots and parenthesis are common in code we write, but on many occasions leaving those out can make the code less noisy and easier to follow. For example, the following is familiar code in Java:

//Java
if(obj instanceof String) {

Imagine Java had insisted that we write if(obj.instanceOf(String)) {—what a clutter that would have been. Instead, we used a nice syntax if(obj instanceof String) {—that’s much easier to read, and it uses what is called the infix notation, where an operator is infixed or implanted in the middle of its operands. That syntax is nice, but in Java such fluency is limited to predefined operators. In Kotlin you can use the infix notation—that is, leave out dots and parenthesis—for your own ...