urgent sed help

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# 1  
Old 04-26-2002
urgent sed help

Hi folks. I've tried to research this, but haven't found a good answer (could be my harried state).

At any rate, I have records that end with

two commas, a number, two commas

this could be anywhere from




I need to remove the last two fields (the number and last double comma) from these records.

However, I also have records that end in a number and two commas. I do not want to change these.

Also, the number of fields varies from record to record.

sed 's/,,*,,/,,/g' file > newfile

does not work.

What am I missing here?

Thanks in advance,
# 2  
Old 04-26-2002
sed 's/,,[0-9]*,,$/,,/'
# 3  
Old 04-26-2002
Computer Thanks!

That worked! Thanks so much.

Now, why did that work and mine did not?
# 4  
Old 04-26-2002
Because I did it correctly and you didn't. Smilie

Seriously, you left out [0-9]

I would think that would stand out like a sore thumb. That $ anchors the regular expression to the end. It seemed like a good idea. [0-9]
matches a digit. [0-9]* matches a string of digits. The RE you used ,* matches a string of commas.
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