bash - in for loop, output command to file AND set variable

Question

Is it possible to output the result of a command to a file AND set a variable, all in the same command?

The following will append the output to a file, but wont set var.

for i in myarray; do
    var=$(command >> file)
done

Not sure if this is possible or not.

John1024 · Accepted Answer · 2016-04-27 00:25:34Z

5

The following will send the output to file as well as set var:

var=$(command | tee -a file)

This works because tee duplicates the output of command. One copy is appended to file while the other copy is sent to stdout. Command substitution, $(...), captures that stdout and saves it in var.

answered Apr 27, 2016 at 0:25

John1024

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