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kotlinlang

Hello everyone,
I'm trying to understand if there is a difference between
`Map.entries.forEach`
and
`Map.forEach`
Calling entries can be expensive, not sure if second example does the same behind?

Yes, both of these lines are the same after compilation. From the stdlib:
```@kotlin.internal.InlineOnly
public inline operator fun &lt;K, V&gt; Map&lt;out K, V&gt;.iterator(): Iterator&lt;Map.Entry&lt;K, V&gt;&gt; = entries.iterator()```
What makes you think using `entries` is expensive? It's a two object allocations (instead of one for any other iterator), and it's cached between calls for the Java HashMap. Except in very rare cases, it's virtually free.

Full disclosure, I got this feedback from my coworker, so unfortunately I can't argue you here  :slightly_smiling_face:
Thanks for the answer btw