How to concatenate stdin and a string?

Question

How to I concatenate stdin to a string, like this?

echo \"input\" | COMMAND \"string\"

and get

inputstring

Answer 1

I know this is a few years late, but you can accomplish this with the xargs -J option:

echo "input" | xargs -J "%" echo "%" "string"

And since it is xargs, you can do this on multiple lines of a file at once. If the file 'names' has three lines, like:

Adam
Bob
Charlie

You could do:

cat names | xargs -n 1 -J "%" echo "I like" "%" "because he is nice"