Example code throws 'undefined'

[nstansbury]

Running code in examples/data/fake-stream.js with node process_name | tty-table --format=json

Output via console.log(JSON.stringify(array))

Throws undefined

Node v8.1.4

[tecfu]

I'm not quite sure what you're doing here.

node process_name | tty-table --format=json

The above line is a piped command you would run in bash. This will output a table to the CLI, given JSON input from "process_name" that is piped to tty-table in a terminal emulator.

console.log(JSON.stringify(array))

The above line is nodejs code. It wouldn't be used in conjunction with the previous line. In this context, it doesn't make sense...since its nodejs code rather than bash commands.

[nstansbury]

So how does my node process send data to stdout to be piped to tty-table, and how does tty-table read data piped to it from the output of my process?

[nstansbury]

You might like to look at the code in: https://github.com/tecfu/tty-table/blob/master/examples/data/streamer.js

[tecfu]

That streamer example basically just outputs a "stream" of data to STDOUT. You then pipe it to tty-table, which reads it from STDIN. Are you running an example verbatim and finding it doesn't work?

[nstansbury]

Yep I had realised what it was supposed to do. I have a real-time stream of data I was trying use tty-table to chart, and couldn't get it to work, so I copied and pasted the code from fake-stream into my node process and got the error reported.

[tecfu]

If you run the examples given, do they work?