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Top Forums Shell Programming and Scripting Script to check for a specific number of columns in a file Post 302945206 by chatwithsaurav on Wednesday 27th of May 2015 05:16:09 AM
Old 05-27-2015
Script to check for a specific number of columns in a file

Hi All

I have a file which has five columns in each rows.
Code:
cat file.txt
a|b|c|d|e
1|2|3|4|5
a1|a2|a3|a4|a5
.
.
.

I need to make sure that there are no less than five or more than five columns (in all the rows) by mistake. I tried this :

Code:
cat file.txt | awk 'BEGIN{FS="|"};{print NF}' > file1.txt

The above code is giving me the count of fields for each row. Can anybody help me modify it a little more so that the moment for a particular row it does not match five it will print me the row?
 

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DB2_FETCH_BOTH(3)							 1							 DB2_FETCH_BOTH(3)

db2_fetch_both - Returns an array, indexed by both column name and position, representing a row in a result set

SYNOPSIS
array db2_fetch_both (resource $stmt, [int $row_number = -1]) DESCRIPTION
Returns an array, indexed by both column name and position, representing a row in a result set. Note that the row returned by db2_fetch_both(3) requires more memory than the single-indexed arrays returned by db2_fetch_assoc(3) or db2_fetch_array(3). PARAMETERS
o $stmt - A valid stmt resource containing a result set. o $row_number - Requests a specific 1-indexed row from the result set. Passing this parameter results in a PHP warning if the result set uses a forward-only cursor. RETURN VALUES
Returns an associative array with column values indexed by both the column name and 0-indexed column number. The array represents the next or requested row in the result set. Returns FALSE if there are no rows left in the result set, or if the row requested by $row_number does not exist in the result set. EXAMPLES
Example #1 Iterating through a forward-only cursor If you call db2_fetch_both(3) without a specific row number, it automatically retrieves the next row in the result set. The follow- ing example accesses columns in the returned array by both column name and by numeric index. <?php $sql = "SELECT id, name, breed, weight FROM animals ORDER BY breed"; $stmt = db2_prepare($conn, $sql); $result = db2_execute($stmt); while ($row = db2_fetch_both($stmt)) { printf ("%-5d %-16s %-32s %10s ", $row['ID'], $row[0], $row['BREED'], $row[3]); } ?> The above example will output: 0 Pook cat 3.20 5 Rickety Ride goat 9.70 2 Smarty horse 350.00 Example #2 Retrieving specific rows with db2_fetch_both(3) from a scrollable cursor If your result set uses a scrollable cursor, you can call db2_fetch_both(3) with a specific row number. The following example retrieves every other row in the result set, starting with the second row. <?php $sql = "SELECT id, name, breed, weight FROM animals ORDER BY breed"; $result = db2_exec($stmt, $sql, array('cursor' => DB2_SCROLLABLE)); $i=2; while ($row = db2_fetch_both($result, $i)) { printf ("%-5d %-16s %-32s %10s ", $row[0], $row['NAME'], $row[2], $row['WEIGHT']); $i = $i + 2; } ?> The above example will output: 0 Pook cat 3.20 5 Rickety Ride goat 9.70 2 Smarty horse 350.00 SEE ALSO
db2_fetch_array(3), db2_fetch_assoc(3), db2_fetch_object(3), db2_fetch_row(3), db2_result(3). PHP Documentation Group DB2_FETCH_BOTH(3)
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