Save modifications in place with awk

Question

I am learning awk and I would like to know if there is an option to write changes to file, similar to sed where I would use -i option

Answer 1

following won't work

echo $(awk '{awk code}' file) > file

this should work

echo "$(awk '{awk code}' file)" > file

Answer 2

An alternative is to use sponge:

awk '{print $0}' your_file | sponge your_file

Where you replace '{print $0}' by your awk script and your_file by the name of the file you want to edit in place.

sponge absorbs entirely the input before saving it to the file.