is there something I’m completely missing about us...

# getting-started

[Dan O'Brien]

is there something I’m completely missing about using a while loop within a for loop? The while loop is looping over a list of JSwing nodes, the for loop is iterating over a list of items but the for loops only runs a single time then just does not loop, I don’t get it. I originally tried a foreach, and now I’m just adding print statements to try to understand what I’m doing wrong. I know this code is not the cleanest/most correct lol. Learning Kotlin as I go

Untitled

[Dan O'Brien]

and to clarify the size prints as 29 and the idx var never increments above 0

[Michael de Kaste]

hard to debug someone else's code, but idx should increment. So what happens? You just go past the try? Do you catch an error?

[Michael de Kaste]

also, debugging by printing is generally not smart if you just have access to the debugger

[Dan O'Brien]

thanks @Michael de Kaste! I ended up running it through the debugger and still not sure of what was causing issue in first place but reworked some code and it loops as expected 🤷‍♂️

[nanodeath]

aside: I'd convert that Enumeration into anything else first...using Collections.list() maybe. or maybe there's a asSequence adapter you can use/write

[Dan O'Brien]

appreciate it, I’ll look to do that. Is there specific performance or readability reasons for the change?

[nanodeath]

Enumerations are just very...Java 1.0. doesn't look like you can even use them directly in for-each, right? manually iterating things can be a source of errors

[nanodeath]

if it was a sequence or list you wouldn't need that parent.userObject is FlagNodeParent check either; you could use .filterIsInstance<FlagNodeParent>

[Dan O'Brien]

lol I’m not entirely sure myself, I found a project to use Kotlin on to also learn some about the JVM. Loving Kotlin so far, but I’m very much in the early stages of my understanding

[nanodeath]

if you pasted another version with all the debug statements and commenting code removed, and enabled Kotlin syntax highlighting...that would make it easier for others to read.

[nanodeath]

you've tried attaching a debugger, too? often that's the best way to see what's going on

[nanodeath]

oh sorry, yeah you tried that

[nanodeath]

eh, I guess it's working now?

[Dan O'Brien]

for this problem 😄 onto other ones of my own making with lack of understanding. Thanks again for the help and pointers!

[nanodeath]

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