Setting an environment variable before a command in Bash is not working for the second command in a pipe

Question

In a given shell, normally I\'d set a variable or variables and then run a command. Recently I learned about the concept of prepending a variable definition to a command:

Answer 1

How about exporting the variable, but only inside the subshell?:

(export FOO=bar && somecommand someargs | somecommand2)

Keith has a point, to unconditionally execute the commands, do this:

(export FOO=bar; somecommand someargs | somecommand2)