I'm planning to prepare a presentation for a KUG meeting on this topic: "_10 surprises when coming f...

# announcements

[Piotr Krzemiński]

I'm planning to prepare a presentation for a KUG meeting on this topic: "_10 surprises when coming from Java to Kotlin_". Please share in this thread things that in your opinion would be worth mentioning in the presentation :) I have my thoughts, but reaching to the community because maybe I forgot about something important (started with Kotlin 4 years ago, might have forgotten something).

[Piotr Krzemiński]

As an example: in Java we first write variable type and then it's name, and in Kotlin - the opposite. Such examples will be accompanied in the presentation with explanations why Kotlin designers might have chosen a given patch.

[Benoît Liessens]

Daisy-chaining function calls is is not limited to collections (Streams in Java). Functions like let(), apply() and also() act as glue

[Benoît Liessens]

Type inference is very neat but not be mindfull with inferred function return types. (Still figuring out when to (not) rely on them)

[Benoît Liessens]

Singletons are native to the Kotlin langauge (object)

[Benoît Liessens]

Assign multiple values in 1 statement: val (a, b) = regex.matchEntire(“some string”).destructured.

[Benoît Liessens]

Pair and Triple are included in the kotlin std lib

[crummy]

Foo(bar) { lambda } - the lambda is an argument to Foo even though it's outside the brackets! Very confusing

[Ayfri]

Yes

[Benoît Liessens]

in Kotlin if is an expression while in Java it is just a statement

[andylamax]

The setters and getters change to just the variable name itself (i.e. setAge() and getAge(), just become age=<>)

[Benoît Liessens]

Just as I was getting accustomed to using infix function or I discovered that it behaves like Java's | and not || !

[darkmoon_uk]

There is no static

[Benoît Liessens]

Extending upon @darkmoon_uk: a Kotlin nested class is like a Java static nested class. While a Kotlin inner nested classes is like a Java non-static nested classes.

[Benoît Liessens]

@Piotr Krzemiński would you mind sharing your presentation? (Assuming it is in English). Thanks

[Piotr Krzemiński]

yep, it will be published during Tricity Kotlin User Group meeting on September 16th, I'll share the recording here

[Benoît Liessens]

👍