How to store shell command output from Executor node

vvvv gamma question
1

Hello, for a project I need to run a traceroute from vvvv and I have to see and store its results in vvvv.
I’ve tried using the Executor node, but it only outputs as an Observable, one line at a time, oftentimes very fast.
I’ve tried a workaround with cache but it’s rough and I can’t wrap my head around a more efficient way of doing it - I’m terrible at working with Observables hahaha…

This is what I get, one line at a time:

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And this is what I want, everything at once:
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Any suggestions, nodes other than the Executor that can run or read the result of commands, or better ways of storing the results? Help is much appreciated

2

Try using HoldLatest node.
Should you get “everything” at once? Or it is line after line?
If you are familiar with Records you could create a data type and store the results every time you receive something.
Alternatively you can perhaps use a Queue node and “Insert” everytime you receive something out if Executor.

1 Like
3

The Queue node works perfectly for this! Thank you! :D

((I had already tried the HoldLatest, Sampler and S+H nodes and those didn’t work, but the Queue node is exactly what I was looking for ^_^))

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4

Also SpreadBuilder can be used in some cases
In this case, the application outputs the desired rows line by line until it finishes with a “null” row.
I collect in builder and give the resulting spread on line zero as a new observable

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but beware of null strings mixed in with spreads:

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5

sorry for the late reply, thank you for your answer! I’ll try to see if this way works better for me, thanks for letting me know ^_^