Functional coverage tree: Difference between revisions

<lang J>unrooted=: ([:;@(({.@[,(+}.)~)&.> [: +/\1,_1}.#@>) <@(_1,$:@}.);.1)^:(1<#)

parent=: unrooted level

 

<code>unrooted</code> translates indentation information to a [[Tree_traversal#J:_Alternate_implementation|parent tree structure]]. However, the limitations of recursion require we distinguish the parent node from its children, so we use _1 to denote the parent node of the recursive intermediate result unrooted trees. (This works well with using arithmetic to adjust sub-tree indices based on the lengths of preceding sub-trees.)