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Text manipulation with sed/awk in a bash script

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# 1  
Old 01-21-2016
Text manipulation with sed/awk in a bash script
Guys, I have a variable in a script that I want to transform to into something else Im hoping you guys can help. It doesn't have to use sed/awk but I figured these would be the simplest.

DATE=20160120

I'd like to transform $DATE into "01-20-16" and move it into a new variable called $SIMPLEDATE


the format is always the same, notice I need to transform 2016 in just 16 and move it around.

thanks
# 2  
Old 01-21-2016
Any attempts/ideas/thoughts from your side?
# 3  
Old 01-21-2016
Easy
Code:
DATE=20160120; echo $DATE | sed 's/[0-9]/& /g' | tr 0-9 a-k | 
awk '{print $5, $6, $7, $8, $3, $4}' | sed 's/ //g' |
sed 's/./&-/2; s/./&-/5' | tr a-k 0-9

# 4  
Old 01-21-2016
Anyhow, try
Code:
date -d$DATE +%d-%m-%y
20-01-16
echo ${DATE:6:2}-${DATE:4:2}-${DATE:2:2}
20-01-16

# 5  
Old 01-21-2016
Quote:
Originally Posted by RudiC
Anyhow, try
Code:
date -d$DATE +%d-%m-%y
20-01-16
echo ${DATE:6:2}-${DATE:4:2}-${DATE:2:2}
20-01-16

What about AIX, HP, Solaris - they do not have -d option for date.

No. My version is the right. Smilie
# 6  
Old 01-21-2016
Code:
DATE=20160120
SIMPLEDATE=`echo "$DATE" | sed 's/..\(..\)\(..\)\(..\)/\2-\3-\1/'`
echo "$SIMPLEDATE"
01-20-16

This User Gave Thanks to MadeInGermany For This Post:
dendenyc
# 7  
Old 01-21-2016
Quote:
Originally Posted by MadeInGermany
Code:
DATE=20160120
SIMPLEDATE=`echo "$DATE" | sed 's/..\(..\)\(..\)\(..\)/\2-\3-\1/'`
echo "$SIMPLEDATE"
01-20-16

This is perfect man, thank you...
Can you explain exactly whats going on here? I read some info on sed but to be honest Im not following. I'd love to learn so I can do this myself next time.
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