awk: convert column to row in a specific way


 
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# 1  
awk: convert column to row in a specific way

Hi all!

I have this kind of output:
Code:
a1|b1|c1|d1|e1
a2|b2|c2
a3|b3|c3|d3

I would like to transpose columns d and e (when they exist) in column c, and under the row where they come from.
Then copying the beginning of the row.

In order to obtain:
Code:
a1|b1|c1
a1|b1|d1
a1|b1|e1
a2|b2|c2
a3|b3|c3
a3|b3|d3

I have no idea how to do that ...

If someone could help me, it would be great !
Thanks !
# 2  
Code:
awk -F'|' '{for(i=3; i<=NF; ++i) print $1FS$2FS$i}'

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