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Changing time-stamp with sed

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# 1  
Old 11-19-2013
Changing time-stamp with sed
Hi !

I try to change a time-stamp hh:mm:ss allways to full ten-minutes.
example: 12:51:03 to 12:50:03
Code:
sed 's/:[0-5][1-5]:/:{0-5}0:/g' file.txt

but it will not work propperly, because the minute-decade will be replaced with the bracket-term {0-5}. Can someone please give me a hint?

Thanks in advance,
IMPe
# 2  
Old 11-19-2013
The feature you are looking for is called a backreference, you can quote parts of text inside \( \) and refer to them later with \1 \2 \3 ...

Code:
sed 's/:\([0-5]\)[1-5]:/:\10:/g' file.txt

This User Gave Thanks to Corona688 For This Post:
IMPe
# 3  
Old 11-19-2013
Hi, try:
Code:
sed -e 's/\(:[0-9]\)[1-9]:/\10:/' file.txt

Regards.

Edit: Too late Smilie

In Fact, no, @Corona688: [0-5] it's right but [1-5] ?
Last edited by disedorgue; 11-19-2013 at 12:45 PM..
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IMPe
# 4  
Old 11-19-2013
Because that's what he had. I suspect we don't completely know his requirements, maybe he wants to do rounding...
This User Gave Thanks to Corona688 For This Post:
IMPe
# 5  
Old 11-19-2013
He said:
allways to full ten-minutes Smilie
This User Gave Thanks to disedorgue For This Post:
IMPe
# 6  
Old 11-19-2013
Yes... and then showed an example that matched 1-5. Does he want to round down to ten minutes for low numbers, and up to ten minutes for high ones?

Being unsure, I showed him how backreferences worked and left the rest for him.
These 2 Users Gave Thanks to Corona688 For This Post:
disedorgue IMPe
# 7  
Old 11-19-2013
Quote:
Originally Posted by Corona688
Yes... and then showed an example that matched 1-5. Does he want to round down to ten minutes for low numbers, and up to ten minutes for high ones?

Being unsure, I showed him how backreferences worked and left the rest for him.
Thanks a lot to you and disedorgue and a big sorry for the imprecise description.
what a finally want, was rounding down the decade-minute and it works fine with
Code:
sed 's/:\([0-5]\)[1-5]:/:\10:/g'  file.txt

Thanks,
IMPe
This User Gave Thanks to IMPe For This Post:
Corona688
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