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Removing duplicate terms in a file

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# 1  
Old 11-08-2012
Removing duplicate terms in a file
Hi everybody
I have a .txt file that contains some assembly code for optimizing it i need to remove some replicated parts.
for example I have:
Code:
e_li r0,-1 
e_li r25,-1  
e_lis r25,0000  
 
add r31, r31 ,r0 
       
e_li r28,-1  
e_lis r28,0000  
 
add r31, r31 ,r0 
       
e_li r28,-1  
e_lis r28,0000  
 
add r31, r31 ,r0 
       
e_li r2,-1  
e_lis r2,0000  
 
add r31, r31 ,r0 
       
e_li r9,-1  
e_lis r9,0000  
 
add r31, r31 ,r0 
       
e_li r24,-1  
e_lis r24,0000  
 
add r31, r31 ,r0 
       
e_li r21,-1  
e_lis r21,0000  
 
add r31, r31 ,r0 
       
e_li r28,-1  
e_lis r28,0000  
 
add r31, r31 ,r0

So if in a way I could remove the replicated parts the final code would look like:
Code:
e_li r0,-1 
e_li r25,-1  
e_lis r25,0000  
 
add r31, r31 ,r0 
       
e_li r28,-1  
e_lis r28,0000  
 
add r31, r31 ,r0 
              
e_li r2,-1  
e_lis r2,0000  
 
add r31, r31 ,r0 
       
e_li r9,-1  
e_lis r9,0000  
 
add r31, r31 ,r0 
       
e_li r24,-1  
e_lis r24,0000  
 
add r31, r31 ,r0 
       
e_li r21,-1  
e_lis r21,0000  
 
add r31, r31 ,r0

Thanks for your help
# 2  
Old 11-08-2012
try:
Code:
awk '
{sub(" *$",""); sub("^ *",""); l=l":"$0; }
/add/ {if (b[l]) {l=""; next;} else {a[c++]=l; b[l]=l;};l=""}
END {
  for (i=0; i<c; i++) {
    sub("^:", "", a[i]);
    gsub(":", "\n", a[i]);
    printf a[i];
    print "";
  }
}
' a.txt

This User Gave Thanks to rdrtx1 For This Post:
Behrouzx77
# 3  
Old 11-09-2012
Thanks rdrtx1, seems work! Smilie
# 4  
Old 11-09-2012
Alternatively (just for fun):
Code:
awk '{getline p} !A[$0,p]++{print $0 ORS p}' RS= ORS='\n\n' infile

But this is probably not practical, since it would be sensitive to extra spaces in the input file..
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