> > @fib[1, 5, 10..15, 20] > (1 8 (89 144 233 377 610 987) 10946) > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > > Why???
As Joe noted in his last email: > remember, back in perl-land the default behavior is to flatten, > in raku ... by default [raku is] oriented toward building up > complex structures like arrays of arrays. So Raku does *not* flatten the `10..15`, yielding the result you see. ---- You may have been thrown by seeing that, with `@fib[1..5]`, the range *is* flattened. That's because of the "single argument rule". This is an important Raku concept. In brief, in contexts that are inherently "listy", not "scalar", Raku takes the view that if it's given a *single* thing that is itself listy, Raku should treat that thing as the list of elements it contains. Whereas, if it's given a list of things, then it just accepts that list as is. Thus `@fib[1..5]` treats the `1..5` as 5 elements, i.e. flattening the range, but treats `@fib[1, 5, 10..15, 20]` as 4 elements, with the third being a nested 6 element list that it does *not* flatten. ---- Perhaps you want the whole lot flattened. Quoting Joe again: > arrays don't flatten unless you do something to make it happen One option: @fib[flat 1, 5, 10..15, 20] > (1 8 89 144 233 377 610 987 10946) love, raiph
