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Replace a multi-line strings or numbers

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# 1  
Old 05-20-2013
Replace a multi-line strings or numbers
Hi

I have no experience in Unix so any help would be appreciated


I have the flowing text
Code:
235543
123
45654
199
225
578
45654
199
225

I need to find this sequence from A file
Code:
45654
199
225

and replaced it with in B file
Code:
45654
258

so the new file B will be
Code:
235543
123
45654
258
578
45654
258

any help?
Last edited by Scott; 05-20-2013 at 04:29 PM.. Reason: Please use code tags for code and data samples
# 2  
Old 05-20-2013
Here is a solution using awk:
Code:
awk '
        {
                A[++c] = $1
        }
        END {
                for ( i = 1; i <= c; i++ )
                {
                        if ( A[i] == 45654 && A[i+1] == 199 && A[i+2] == 225 )
                        {
                                A[i+1] = 258
                                A[i+2] = 0
                        }
                        if ( A[i] )
                                print A[i]
                }
        }
' file

This User Gave Thanks to Yoda For This Post:
khaled79
# 3  
Old 05-20-2013
Thanks Yoda

but what if I want to search for a variable sequence instead of known. for example
Code:
"variable number" 
199
225

will be
Code:
"variable number" 
258

Thanks
Last edited by Scott; 05-20-2013 at 04:30 PM.. Reason: Code tags
# 4  
Old 05-20-2013
Quote:
Originally Posted by khaled79
but what if I want to search for a variable sequence instead of known.
I didn't quite understand what you mean by variable sequence.

The program that I posted replaces 45654 199 225 to 45654 258

You just have to modify it as per your requirement.
This User Gave Thanks to Yoda For This Post:
khaled79
# 5  
Old 05-20-2013
Thanx again Yoda

sorry for being not clear

what I meant was


what if I want to find sequence that followed by "xxx"
Code:
XXX
199
225

and replace it with
Code:
XXX
258


xxx could be any number between (1 to 260)

so, every time replace all the sequence followed by that XXX

Thank you
# 6  
Old 05-20-2013
So I assume that you are going to define starting sequence in a variable.

In that case you can pass whatever variable to awk, assign it and use it.

You can code something like:
Code:
SEQ=XXX

awk -v S="$SEQ" '
        {
                A[++c] = $1
        }
        END {
                for ( i = 1; i <= c; i++ )
                {
                        if ( A[i] == S && A[i+1] == 199 && A[i+2] == 225 )
                        {
                                A[i+1] = 258
                                A[i+2] = 0
                        }
                        if ( A[i] )
                                print A[i]
                }
        }
' file

I used shell variable: SEQ, replace value XXX with the number of your choice. I hope this helps.
# 7  
Old 05-20-2013
Khaled79,
Check this out:
Code:
# v=45654;perl -0777  -pe 's/$ENV{v}\n199\n225/$ENV{v}\n258/igs' file


Code:
235543
123
45654
258
578
45654
258

This User Gave Thanks to rveri For This Post:
khaled79
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