acomb | Higher-order utilities for use with async functions | Reactive Programming library

I have written some code to find any modems on a unix system using the regex /dev/tty* basically and then for any matches see if can open the port and if so send an AT command and check if the response message contains the characters 'OK'.

The code does find a modem but unfortunately it messes up the terminal display. See below. I notice that it also prints the AT command - see output below. Why is my terminal display altered and how can I fix that?

After running the program, if you enter a command and enter, eg ls, the command is not shown but when you press enter you do see the output.

Here is the code:

How would one go about finding/replacing the following string: "< some_string> S< char 1>S< char 2>-S< char 2>S< char 1>< some string 2>"?

Here we use the notation < char> as some arbitrary character. For instance I might want to replace "aSxSy-SySxb" with "aCOMb". I have read up on groups, but this method does not seem to do the trick, for instance I tried:

I'm attempting to build an R package from code that works outside a package. My first try and it is rather complex, nested functions that end up doing parallel processing using doMPI and foreach. Also using RStudio 1.01.43 on Ubuntu 16.04. I build the package and works ok. Then when I try to run the top level function which calls the next it throws an error:

Easiest way to describe this is show the code. I have a nested foreach loop that works fine, trying to prepare to compile as an R package, thus remove "library(foreach)" in the code. My function looks like this: