Programming

The 3 types of code reviews

Most of us do code reviews on a daily basis, and some days we review more code than we write! Code reviewing is rarely taught so most of us have our own method of giving reviews. What I had realised over time is that there is not just 1 type of review, there are 3 types of…

Use Java Nullability Annotations to facilitate conversion to Kotlin

A common approach to adopting Kotlin is to use it in existing projects either in new features or by gradually converting existing code from Java to Kotlin. In these scenarios it is very common for the newly…

Handle process statuses with Kotlin Sealed Classes

Do you have scenarios where different handling needs to be done according to the status of a process? Something like:

data class Result(
    val isSuccess: Boolean,
    val value: String?,  // non-null when isSuccess…

Kotlin Cheatsheet: Coroutine Dispatchers

Kotlin coroutines make it easy to run asynchronous code, but…

Many ways to handle nulls in Kotlin

A quick reference to null handling

Kotlin Cheatsheet: Null Handling

A quick reference to many ways to handle nulls in Kotlin

Kotlin Cheatsheet: Scope Functions (let, run, apply, also, with)

Note: this can be omitted.

Java Immutability Visualised

In Java, mutability is the default; we are always able to reassign variables to point to something else. Mutability is not always ideal and to make a variable immutable, we’d have to explicitly declare it. There are varying levels of immutability and it’s easier to understand it…

Kotlin Lists are Read-only and not Immutable except when there is only 1 element

Sprout By Delegate — Refactoring Java to Kotlin gradually with Delegates

Let’s say we’re trying to use more Kotlin and aim to convert all the Java code into Kotlin some day. Imagine that we have an interface and an implementation in Java; existing classes use the interface and…