Replace some strings keeping others


 
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# 1  
Replace some strings keeping others

I want to replace strings in test2 according to test1 table. In doing so, I`m losing records that I dont need to replace, please suggest modifications.

what i have

Code:
 
$ cat > test1
a b
c d
 
$ cat > test2
a
a
a
d
d
 
what i tried 
 
$ awk ' BEGIN {FS=OFS=" "} FNR==NR{a[$1]=$2;next} $1 in a{print a[$1]}' test1 test2
b
b
b



what i want

Code:
 
 
b
b
b
d
d



# 2  
Taking your request at face value:
Code:
awk 'FNR==NR{a[$1]=$2;next} {print (($1 in a) ? a[$1] : $1);}' test1 test2

This User Gave Thanks to Aia For This Post:
# 3  
thank you Aia, I have another question but I should create a new post for it..
 

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