附加到bash的最后一行

Question

This question is related to this one .

The file text.csv contains:

#some text
some more text
b,a,c,

The file numbers.csv contains:

32
34
25
13

I would like to append numbers.csv to text.csv like this:

#some text
some more text
b,a,c,32,34,25,13

I have tried some of the recommendations in the linked example, but they tend to put everything on one line. I really want to append only to the last line. How can this be done?

Answer 1

sed and paste will solve this

$ sed '$s/$/'"$(paste -sd, numbers)"'/' letters

#some text
some more text
b,a,c,32,34,25,13