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Full Discussion: Search for a string and replace the searched string in the same position in samefile
Top Forums UNIX for Dummies Questions & Answers Search for a string and replace the searched string in the same position in samefile Post 302293037 by ganesh_248 on Monday 2nd of March 2009 07:33:28 AM
Old 03-02-2009
Quote:
Originally Posted by Whiteboard
Code:
$ cat tab.txt
00000000 0 +00000000.00 2008/12/29 11:06:04 0108/12/29 10:05:37 00521363
 
$ awk '{sub(/^../,"20",$6); print}' OFS="\t" tab.txt
00000000        0       +00000000.00    2008/12/29      11:06:04        2008/12/29      10:05:37        00521363

$ cat samp.txt
00000000        0       +00000000.00    2008/12/29      11:06:04        0108/12/29

$ awk '{sub(/^../,"20",$6); print}' samp.txt
00000000 0 +00000000.00 2008/12/29 11:06:04 2008/12/29

$ awk '{sub(/^../,"20",$6); print}' OFS="\t" samp.txt
00000000        0       +00000000.00    2008/12/29      11:06:04        2008/12/29


Hope you can understand the above code with sample examples.....
White your suggestion worked fine ;-) ...Thanks
But my file contains header records i.e first 3 to 4 rows are column headings..so when i apply your above mentioned command it applies to the column heading row also..is there any provision to skip the first 3 to 4 lines and then do the required manipulation...i don not want to read the file line by line .i just want to skip the first three to four lines and do the date manipulation part,write it in file and then move it to the original file. Pls help me out....
 

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LEARN ABOUT PHP

db2_field_num

DB2_FIELD_NUM(3)							 1							  DB2_FIELD_NUM(3)

db2_field_num - Returns the position of the named column in a result set

SYNOPSIS

       int db2_field_num (resource  $stmt, mixed  $column)

DESCRIPTION

	Returns the position of the named column in a result set.

PARAMETERS

	      o $stmt
		- Specifies a statement resource containing a result set.

	      o $column
		-  Specifies  the  column in the result set. This can either be an integer representing the 0-indexed position of the column, or a
		string containing the name of the column.

RETURN VALUES

	Returns an integer containing the 0-indexed position of the named column in the result set. If the specified column does not exist in  the
       result set, db2_field_num(3) returns FALSE.

SEE ALSO

       db2_field_display_size(3), db2_field_name(3), db2_field_precision(3), db2_field_scale(3), db2_field_type(3), db2_field_width(3).

PHP Documentation Group 													  DB2_FIELD_NUM(3)
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