viaduct | Wrapper for quic and websocket | Data Processing library

Try sed -i '1 i\anything' file.

sed is a replace

-i is to replace in place

1 indicates line 1, aka the header

i\ means prepend

file is the filename, or matching pattern for your files.

This seems to be a problem with the names being set in the geometry of the lines, following recent updates - see the discussion here https://github.com/r-spatial/sf/issues/880 - which suggests just removing them.

This works for me with your example...

You may try

Your code has some flaws, currently it will only loop over your list and always overwrite find_customer with the current balance of the customer * 2.

You need to filter for the right name which was input, try it like this:

Your error is caused by missing pluralization, devise don't know what registration is, but work with registrations.

Solution :

Within your group pipeline, create the age ranges as part of the _id key and this can be done through the use of the $concat and "$cond" operators. Consider running the following pipeline to get the desired result: