extract a word from text file name


 
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# 1  
Old 12-21-2011
extract a word from text file name

Hi i want to extract the word present before .txt in the text file.

For example,

Sample_ab_a.txt ----------> i need 'a'
Sample_abc_b.txt -----------> i need 'b'

Can anyone help me in getting the word extracted
# 2  
Old 12-21-2011
Code:
STR="Sample_ab_a.txt"
OLDIFS="$IFS"; IFS="_."
        set -- $STR # STR must not be quoted!
IFS="$OLDIFS"

while [ $# -gt 2 ] ; do shift ; done

echo "name is $1"

# 3  
Old 12-21-2011
Code:
echo "Sample_ab_b.txt" | nawk -F"[_.]" '{print $(NF-1)}'

# 4  
Old 12-21-2011
Code:
echo "Sample_ab_a.txt" | sed 's|.*\(.\)\.txt|\1|' 
a

echo "Sample_abc_b.txt" | sed 's|.*\(.\)\.txt|\1|' 
b

# 5  
Old 12-22-2011
Thank u so much for all Smilie
# 6  
Old 12-22-2011
Try this one...

Code:
$echo Sample_ab_a.txt  | sed   s/.*_// | sed s/\.txt//
a

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