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Top Forums Shell Programming and Scripting Searching backwards using regular expressions Post 302389010 by drl on Friday 22nd of January 2010 06:48:36 AM
Old 01-22-2010
Hi.

I like utility cgrep for situations like this. It allows one to specify conveniently a regular expression for the previous and succeeding boundaries -- "windows":
Code:
#!/usr/bin/env bash

# @(#) s1	Demonstrate previous boundary match with cgrep.
# http://www.bell-labs.com/project/wwexptools/cgrep/

echo
set +o nounset
LC_ALL=C ; LANG=C ; export LC_ALL LANG
echo "Environment: LC_ALL = $LC_ALL, LANG = $LANG"
echo "(Versions displayed with local utility \"version\")"
version >/dev/null 2>&1 && version "=o" $(_eat $0 $1)
set -o nounset
echo

FILE=${1-data1}

echo " Data file $FILE:"
cat $FILE

echo
echo " Results:"
cgrep -D -w "else if" "find me" $FILE

exit 0

producong:
Code:
% ./s1

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 2.6.26-2-amd64, x86_64
Distribution        : Debian GNU/Linux 5.0 
GNU bash 3.2.39

 Data file data1:
if(condition)
	multiline
	statement
else if(condition)
	multiline
	statement
else if(condition)
	multiline
	statement
else if(condition)
	multiline
	statement
else if(condition)
	multiline
	statement
	find me
else if(condition)
	multiline
	statement

 Results:
else if(condition)
	multiline
	statement
	find me

You will need to obtain, compile, and make available cgrep. See the URL mentioned in the script for that.

Best wishes ... cheers, drl
 

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OCI_FIELD_NAME(3)														 OCI_FIELD_NAME(3)

oci_field_name - Returns the name of a field from the statement

SYNOPSIS
string oci_field_name (resource $statement, mixed $field) DESCRIPTION
Returns the name of the $field. PARAMETERS
o $statement - A valid OCI statement identifier. o $field - Can be the field's index (1-based) or name. RETURN VALUES
Returns the name as a string, or FALSE on errors. EXAMPLES
Example #1 oci_field_name(3) example <?php // Create the table with: // CREATE TABLE mytab (number_col NUMBER, varchar2_col varchar2(1), // clob_col CLOB, date_col DATE); $conn = oci_connect("hr", "hrpwd", "localhost/XE"); if (!$conn) { $m = oci_error(); trigger_error(htmlentities($m['message']), E_USER_ERROR); } $stid = oci_parse($conn, "SELECT * FROM mytab"); oci_execute($stid, OCI_DESCRIBE_ONLY); // Use OCI_DESCRIBE_ONLY if not fetching rows echo "<table border="1"> "; echo "<tr>"; echo "<th>Name</th>"; echo "<th>Type</th>"; echo "<th>Length</th>"; echo "</tr> "; $ncols = oci_num_fields($stid); for ($i = 1; $i <= $ncols; $i++) { $column_name = oci_field_name($stid, $i); $column_type = oci_field_type($stid, $i); echo "<tr>"; echo "<td>$column_name</td>"; echo "<td>$column_type</td>"; echo "</tr> "; } echo "</table> "; // Outputs: // Name Type // NUMBER_COL NUMBER // VARCHAR2_COL VARCHAR2 // CLOB_COL CLOB // DATE_COL DATE oci_free_statement($stid); oci_close($conn); ?> NOTES
Note In PHP versions before 5.0.0 you must use ocicolumnname(3) instead. This name still can be used, it was left as alias of oci_field_name(3) for downwards compatability. This, however, is deprecated and not recommended. SEE ALSO
oci_num_fields(3), oci_field_type(3), oci_field_size(3). PHP Documentation Group OCI_FIELD_NAME(3)
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