How to get second last field from a cut command

Question

I have a set of data as input and need the second last field based on deleimiter. The lines may have different numbers of delimiter. How can I get second last field ?

Answer 1

Code for GNU sed:

$ echo text,blah,blaah,foo|sed -r 's/^(\S+,){2}(\S+),.*/\2/'
blaah

$ echo this,is,another,text,line|sed -r 's/^(\S+,){2}(\S+),.*/\2/'
text

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Code example similar to sudo_O's awk code:

$ sed -r 's/.*,(\w+),\w+$/\1/' file
blaah
text

It might be better to use more specialised programs for CSV files, eg. awk or excel.