getchar or some such thing needed?

[sanjayjain159]

I am an engineer, and an end user of janet. I wish to apply it to scientific data acquisition and analysis. One situation in daq is to interrupt program execution by means of a keystroke on the keyboard, for example the special function key F1 or any other key. Janet getline cannot be used since there is no newline char here. How would this be done in Janet?

[bakpakin]

Without know exactly what you are building, I'm not sure exactly what you want. It sounds like you want something like Python's KeyboardInterrupt? Otherwise, I recommend using Ctrl-Z to interrupt (and later resume) execution of programs. This is a feature of the shell, not of Janet, though.

[sanjayjain159]

Sorry, I will explain more. I had used BASIC for data acquisition earlier and there was a branching instruction ON KEY GOTO/GOSUB which was useful to direct program execution at touch of key. I was wondering how to do something similar in Janet. I now realize Janet has better mechanisms such as event module and perhaps even file/read since in unix even the keyboard is a file. Still I would appreciate your thoughts on this. BR, SJain

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On 2 September 2021 4:02:10 AM IST, Calvin Rose ***@***.***> wrote: Without know exactly what you are building, I'm not sure exactly what you want. It sounds like you want something like Python's KeyboardInterrupt? Otherwise, I recommend using Ctrl-Z to interrupt (and later resume) execution of programs. -- You are receiving this because you authored the thread. Reply to this email directly or view it on GitHub: #781 (comment)