Flatten nested tuples to a tuple

New to Julia
1

I thought I would find a straightforward answer but haven’t been able to locate one. Sorry if this is a stupid question: What’s the simplest way to flatten a nested tuple?

The problems is, I call a function which returns a tuple of a different number of elements depending on the argument and I need to add one element in an intermediate function and return them together:

func(flag) = flag ? (2,3,4) : (2,3,4,5)

function myfunc()
  a = 1
  b, c, d = func(true) # When you know # of elems.
  return (a, b, c, d) # Works
end

function myfunc2(flag)
  a = 1
  t = func(flag)
  return vcat(a, collect(t))
end

function myfunc3(flag)
  a = 1
  t = func(flag)
  return myflatten(a, t) # What function?
end

a, b, c, d = myfunc()
a, b, c, d = myfunc2(true)
a, b, c, d, e = myfunc3(false)

In the above toy example, myfunc3() uses a fictitious function myflatten(), but is there a function like that?

myfunc2() works fine. It converts the tuple to a vector and returns the concatenated vector. So, this would be the simplest solution if there is no existing function to flatten tuples.

2

Simply splatting the tuple should be enough in your case:

julia> func(flag) = flag ? (2,3,4) : (2,3,4,5)
func (generic function with 1 method)

julia> a = 1
1

julia> t = func(true)
(2, 3, 4)

julia> (a, t...)
(1, 2, 3, 4)
2 Likes
3

splatting

!!! That’s the word that I should have used to search the Internet. Thank you! After all, my question was stupid.