# Recursively generating a tuple from intermediate neural network outputs
**URL:** https://discourse.julialang.org/t/recursively-generating-a-tuple-from-intermediate-neural-network-outputs/51687
**Category:** New to Julia
**Created:** [December 11, 2020, 9:23pm UTC](https://discourse.julialang.org/t/recursively-generating-a-tuple-from-intermediate-neural-network-outputs/51687 "2020-12-11T21:23:19Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@maxfreu](https://discourse.julialang.org/u/maxfreu)
#### Post date: [December 11, 2020, 9:23pm UTC](https://discourse.julialang.org/t/recursively-generating-a-tuple-from-intermediate-neural-network-outputs/51687/1 "2020-12-11T21:23:19Z")
Hi, I have different neural network “encoders” and would like to generate a tuple containing the output of intermediate stages. The encoders and the number of their stages vary. So essentially I want to automate and flexibilise the following:
```julia
function foo(input, fs)
x1 = f1(input)
x2 = f2(x1)
...
xn = fn(xn-1)
return (x1,x2,...,xn)
end
```
I think there must be an easy solution, but I just can’t wrap my head around it.
---
### Author:  [@ToucheSir](https://discourse.julialang.org/u/ToucheSir)
#### Post date: [December 11, 2020, 9:31pm UTC](https://discourse.julialang.org/t/recursively-generating-a-tuple-from-intermediate-neural-network-outputs/51687/2 "2020-12-11T21:31:02Z")
Looks like [Flux.activations](https://fluxml.ai/Flux.jl/stable/models/regularisation/#Flux.activations) might be what you need?
---
### Author:  [@maxfreu](https://discourse.julialang.org/u/maxfreu)
#### Post date: [December 12, 2020, 10:07am UTC](https://discourse.julialang.org/t/recursively-generating-a-tuple-from-intermediate-neural-network-outputs/51687/3 "2020-12-12T10:07:36Z")
Tail recursion it is… 💡
That‘s why I love julia: jump to the source, look at it, understand it, use it.