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# 1  
Old 05-06-2009
Format the Output
Hi-
Objective of the task is to print the lines which doesnt have a END statement corresponding to a START statement.

Let me know if anyone has a better way of doing is.

My Thoughts

Have 2 files one having START lines and another having END lines (sorted). And then diff the files to get the line which doesnt have an END statment.



Input

Code:
ABC;START
ABC;END
GHF;START
GHF;END
ABC;START
BHY;START
BHY;END

Output should be : ABC;START

since this doesnt have corresponding "ABC;END" line
# 2  
Old 05-06-2009
Try...
Code:
awk '/END/{c=0}/START/{c++;if(c>1)print p;p=$0}' file1

# 3  
Old 05-06-2009
Quote:
Originally Posted by Ygor
Try...
Code:
awk '/END/{c=0}/START/{c++;if(c>1)print p;p=$0}' file1

please confirm at your end for this input
Code:
ABC;START
ABC;END
GHF;START
ABC;START
BHY;START

output:
Code:
# awk '/END/{c=0}/START/{c++;if(c>1)print p;p=$0}' file
GHF;START
ABC;START

# 4  
Old 05-06-2009
Nice catch, simple to fix...
Code:
awk '/END/{c=0}/START/{c++;if(c>1)print p;p=$0}END{if(c>1)print p}' file1

# 5  
Old 05-06-2009
how about this input:
Code:
ABC;START
GHF;START
GHF;END
BHY;START
BHY;END
ABC;END

output:
Code:
 # awk '/END/{c=0}/START/{c++;if(c>1)print p;p=$0}END{if(c>1)print p}' file
ABC;START

# 6  
Old 05-06-2009
@OP, if you have Python and can use it, here's an alternative
Code:
d={}
for line in open("file"):
    first,second = line.strip().split(";")
    d.setdefault(first,[])
    d[first].append(second)
for i,j in d.iteritems():
    startcounts =j.count("START")
    endcounts = j.count("END")
    if startcounts != endcounts:
        print i,j

output:
Code:
# more file
ABC;START
GHF;START
BHY;START
BHY;END
ABC;END
# ./test.py
GHF ['START']

# 7  
Old 05-06-2009
Well i think i should have explained more. The above code checks only for the START/END pattern. But the pattern prior is also important.

In the below case the awk will not return any rows. But it should have thrown as

ABC;START
BHY;START

Input

Code:
ABC;START
TTT;END
BHY;START
TTT;END


For every column1 ( ex: ABC ) there should be a START line and an END line ( END line need not necessary be the next line of START ) . If we dont have a END line for the column1 then we need to print that column1 (or the entire START line). Hope this explains.

Thanks for your inputs.
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