Forgot to CC the list.

-------- Forwarded Message --------

Hi,

One place where it pops up all the time is when you have arrows that create feedback loops and your output is your accumulator.

For example:

feedback acc0 (someFancyArrow >>> arr dup)

Where someFancyArrow is an arrow with two inputs (input and old accumulator) and one output.

Cheers

Ivan

On 28/10/18 00:08, Vanessa McHale wrote:
Out of curiosity, do you have any examples?

Cheers

On 10/27/18 5:03 PM, Ivan Perez wrote:

Dear all,

The function \x -> (x,x) is very convenient when working with arrows.

Would it be appropriate to add it to Data.Tuple?

Cheers,

Ivan

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