Just make a CSV parsing node

That's a really simple task isn't is.

And it is true, that wasn't so hard to do. Now to test it.

How to get a CSV file?

Luckily one of the first things I wrote was an UrlNode, that will fetch a given URL and return the response text of that URL.

This meant that I could fetch any URL from the web that contains CSV data. Luckily those aren't hard to find, you can grab some for yourself.

Quickly put together a workflow

Execute it. And it works. Hurrah!

Technically I was done

But I wanted also create a loop node. Because what do you do with a CSV? Exactly, you loop over the records.

However, this looping might be harder that I thought. Because of the way the system is set up.

It is a queueing service, and each node is put on the queue with the output of the precious node.

Let's see how well that is playing out.

• A node knows nothing about its environment.

• The task only know the Workflow, and the Node it's executing

Now we run into a CSV Parse node, no problem, the node gets a CSV file and outputs a list of lists.

But what happens?

• Let's have an imaginary Loop node there

• The loop nodes get a lists of lists offered correctly

• But then? What is it going to return?

Another list, so the tasks after is get...... The same list?