01-09-2009
count number of nonempty columns in row
Hi,
Suppose i have a inputfile in csv format.
How to use awk to count 'the number of nonempty columns in each row' minus one, and add the value as a new column in the end
For cosmetic reason, it's even better to include a descriptive label for the last column in the first row.
for example, i want to convert
London,a,b,c,,,,->London,a,b,c,,,,,3
York,a,b,,,a,a ->York,a,b,,,a,a,4
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Input
A.1 Q.1
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A.1 Q.2 s1 t2
A.1 Q.3 s1 t3
A.2 Q.4 s5 t5
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LEARN ABOUT PHP
maxdb_fetch_assoc
MAXDB_FETCH_ASSOC(3) 1 MAXDB_FETCH_ASSOC(3)
maxdb_fetch_assoc - Fetch a result row as an associative array
Procedural style
SYNOPSIS
array maxdb_fetch_assoc (resource $result)
DESCRIPTION
Object oriented style
array maxdb_result::fetch_assoc (void )
Returns an associative array that corresponds to the fetched row or NULL if there are no more rows.
The maxdb_fetch_assoc(3) function is used to return an associative array representing the next row in the result set for the result repre-
sented by the $result parameter, where each key in the array represents the name of one of the result set's columns.
If two or more columns of the result have the same field names, the last column will take precedence. To access the other column(s) of the
same name, you either need to access the result with numeric indices by using maxdb_fetch_row(3) or add alias names.
Note
Field names returned by this function are case-sensitive.
Note
This function sets NULL fields to the PHP NULL value.
RETURN VALUES
Returns an array that corresponds to the fetched row or NULL if there are no more rows in resultset.
EXAMPLES
Example #1
Object oriented style
<?php
$maxdb = new maxdb("localhost", "MONA", "RED", "DEMODB");
/* check connection */
if (maxdb_connect_errno()) {
printf("Connect failed: %s
", maxdb_connect_error());
exit();
}
$query = "SELECT name, state FROM hotel.city ORDER by zip";
if ($result = $maxdb->query($query)) {
/* fetch associative array */
while ($row = $result->fetch_assoc()) {
printf ("%s (%s)
", $row["NAME"], $row["STATE"]);
}
/* free result set */
$result->close();
}
/* close connection */
$maxdb->close();
?>
Example #2
Procedural style
<?php
$link = maxdb_connect("localhost", "MONA", "RED", "DEMODB");
/* check connection */
if (maxdb_connect_errno()) {
printf("Connect failed: %s
", maxdb_connect_error());
exit();
}
$query = "SELECT name, state FROM hotel.city ORDER by zip";
if ($result = maxdb_query($link, $query)) {
/* fetch associative array */
while ($row = maxdb_fetch_assoc($result)) {
printf ("%s (%s)
", $row["NAME"], $row["STATE"]);
}
/* free result set */
maxdb_free_result($result);
}
/* close connection */
maxdb_close($link);
?>
The above example will output something similar to:
New York (NY)
New York (NY)
Long Island (NY)
Albany (NY)
Washington (DC)
Washington (DC)
Washington (DC)
Silver Spring (MD)
Daytona Beach (FL)
Deerfield Beach (FL)
Clearwater (FL)
Cincinnati (OH)
Detroit (MI)
Rosemont (IL)
Chicago (IL)
Chicago (IL)
New Orleans (LA)
Dallas (TX)
Los Angeles (CA)
Hollywood (CA)
Long Beach (CA)
Palm Springs (CA)
Irvine (CA)
Santa Clara (CA)
Portland (OR)
SEE ALSO
maxdb_fetch_array(3), maxdb_fetch_row(3), maxdb_fetch_resource(3).
PHP Documentation Group MAXDB_FETCH_ASSOC(3)