Finn

@NeRoboto Could be your ⎕io-setting. 2,[0.5]7 gives a RANK ERROR if you set ⎕io←0.

Thanks all, that was very interesting!

@Adám I never thought about that, good to know! Thank you!

Which seems to be the same as @rabbitgrowth

I had {⌈/0,{(⍸2>/⍵)-⍸2</⍵}0,⍵,0}.

↑(0 1 0 1 0)(0 1 0 1 0)(1 0 0 0 1)(0 1 0 1 0)(0 1 0 1 0)

@Adám I guess adding the following testcase and its transpose should fix the issue with the problem checker, no?

I had {1=≢∪+⌿⍵,⍥{⍵,1 1⍉⍵}⌽⍵}

Thanks @Adám!

@Adám That is funny indeed! For clarity I prefered (¯0.5+○÷4)×*∘2 but decided to do some more code-golfing…

(¯.5+○÷4)××⍨

@rabbitgrowth You could write ⊢⍤/⍨ instead. Although that is not so nice either.

@Adám Thank you!

@Adám Is there a way to extend this solution to rank > 1?

@Adám ∊⍨×⍳

@Adám ⍳|⍨1+≢⍤⊣

@phantomics One thing to note is that you have to set it within the correct build stage. For example adding the line ENV MAXWS=2G directly above ENTRYPOINT ["/entrypoint"] should do the trick (anywhere below line 16 in the Dockerfile should be fine). If you want to use the dyalog/dyalog public image, you can set it within the run command. So docker run -e MAXWS=2G dyalog/dyalog.

@Adám thx