Filling space/tab separated, empty columns with 0

Question

i have a huge file and as an output some columns doesn\'t have a value, i need to fill these columns with 0 for further analysis. I can separate the columns with space or ta

Answer 1

Deleting my answer after re-reading the original post. There are no tabs as data, just delimeters. If there is no data, a double delimeter will apear to align the columns.
It can't be any other way. So if a single delimeter is there, it will separate two empty fields. "" = 1 empty field, "\t" = 2 empty fields. I got it now.

Tim Pietzcker has the correct answer all along. +1 for him.
It could be written alternatively as s/ (?:^|(?<=\t)) (?=\t|$) /0/xg;, but its the same thing.