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Full Discussion: Help with Complex Awk.
Top Forums Shell Programming and Scripting Help with Complex Awk. Post 302717725 by pinnacle on Thursday 18th of October 2012 01:20:14 PM
Old 10-18-2012
Quote:
Originally Posted by rdrtx1
Code:
nawk 'NR<=1000{s=substr($0,25,10);if (s~/ABC/) $0=substr($0,1,99) "5" substr($0,101);print $0}' infile


All,

All the replies looks good to me except the fact that all of them consider the first 1000 rows (NR<=1000) for replacement. But the first 1000 rows that i am expecting to replace are the onces that have "ABC" between 25 and 34 character.

Say the 1000 rows containing "ABC" are records numbers
1001
2001
3003
4005 like that
in this case NR<=1000 will not work.
 

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PX_PUT_RECORDN(3)					     Library Functions Manual						 PX_PUT_RECORDN(3)

NAME
PX_put_recordn -- Stores record in Paradox file at certain position SYNOPSIS
#include <paradox.h> int PX_put_recordn(pxdoc_t *pxdoc, char *data, int recpos) DESCRIPTION
Stores a record in the buffer data into a Paradox file at the given position recpos. The first position has number 0. The function will determine the data block for this record. If the position is after the last data block, then as many as needed empty data blocks will be added. If the position is in the middle of a data block and there is no record right before the position, then the position will be recal- culated to make sure the new record will be stored in the first free slot of the datablock. For example, if a datablock contains H records and the first call of PX_put_recordn wants to store a record at postion 11, then this will be corrected to position H. PX_put_recordn will also add an empty data block and store the record as the first record of the second data block. Storing a second record at position 11 again, will be executed without any position change. data must be constructed with PX_put_data_xxx(3) functions before. It is of the same structure as the record returned by PX_get_record(3) and PX_get_record2(3). RETURN VALUE
Returns the record position on success and -1 on failure. The first position has number 0. SEE ALSO
PX_get_record(3), PX_get_record2(3), PX_put_record(3), PX_put_data_byte(3), PX_put_data_short(3), PX_put_data_long(3), PX_put_data_dou- ble(3), PX_put_data_alpha(3) AUTHOR
This manual page was written by Uwe Steinmann uwe@steinmann.cx. PX_PUT_RECORDN(3)
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