Michael Malone
3/4/2009 3:17:00 AM
Haris wrote:
> Hi.
>
> How can I parse a tree (arrays within arrays), for example a tree of
> strings, to print all strings ?
>
> Thanks.
>
>
>
>
tree walking hints at a recursive routine...
def tree_walk(array)
array.each do |item|
if item.class == Array
tree_walk(item)
else
puts item
end
end
end
or for the one-liners among us
def tree_walk(array)
array.each { |item| (item.class == Array)? tree_walk(item) : puts item }
end
However, I don't reccomend testing on the item.class. I can't explain
why very well, but it seems wrong to me. Maybe someone else can...?
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