Is there any debug feature to see the content of a...
# intellijh
hfhbd
08/08/2023, 3:50 PMIs there any debug feature to see the content of a list, like the Java stream debugger? In Kotlin, you often just chain list operations instead creating a new variable each time:
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val s = listOf().map {}.filter {}.map{}...k
kevin.cianfarini
08/08/2023, 3:53 PMAlso interested. I always do:
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val s = listOf()
.also { println(it) }
.map { ... }
.also { println(it) }
...h
hfhbd
08/08/2023, 3:54 PMYes, but you need to add these println lines and this isn't a real debugging experience with breakpoints and runtime code evaluation 😄
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kevin.cianfarini
08/08/2023, 3:57 PMYup. That’s why I’m interested if there’s a native debugging feature!
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xoangon
08/08/2023, 4:02 PMTo see the whole output of a collection operation, you can put the operations on separate lines and put a breakpoint on each of them.
To dig into the calculations of each collection operation, you can use lambda breakpoints (as the one seen in the screenshot)
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hfhbd
08/08/2023, 4:15 PMYes I know, but I mean this feature: https://www.jetbrains.com/help/idea/analyze-java-stream-operations.html
hfhbd
08/08/2023, 4:17 PMAnd it also does not work for Java source files in a Kotlin project. At least the icon is grey out.
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xoangon
08/08/2023, 4:21 PMOh, I see. I haven’t seen any feature similar to that for Kotlin collections. Seems like a nice feature-request if not yet submitted.
I did a quick search and I didn’t find any ticket for that
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hfhbd
08/08/2023, 4:30 PMHm, after digging YouTrack too, there is an issue about a bug in kotlin.sequences: https://youtrack.jetbrains.com/issue/KTIJ-12019/Connecting-lines-are-absent-for-last-element-in-windowed-operation-column-in-sequence-debugger and I get this nice debugger window too. Ideally, it should just work with lists/collections too, will create a ticket.
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xoangon
08/08/2023, 4:35 PMSuper cool to know about this stuff, thanks for sharing! I don't feel like this feature is widely known by IntelliJ users
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hfhbd
08/08/2023, 5:52 PM2 Views