# Basic syntax:

command_1 | xargs -I {} sh -c "command_2 \$(command_3 {})"

# Where:

#   - -I specifies a string that will be replaced by the stdin when found.

#       This is useful for controlling where the piped content appears in the

#       xargs command

#   - sh -c runs the shell command in quotes which can be used to do command

#       substitution in xargs

#   - the command inside $() is run first and its output is used by command_2

​

# Example usage:

echo "word1 word2" | xargs -I {} sh -c "echo \$(echo {} | tr a-z A-Z)"