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What is the performance cost of having a virtual method in a C++ class?
...ory. This is always a significant stall: on Xenon, about 650 cycles (by my tests).
However this isn't a problem specific to virtual functions because even a direct function call will cause a miss if you jump to instructions that aren't in cache. What matters is whether the function has been run be...
Multiline string literal in C#
...this would give a format exception
string.Format(@"<script> function test(x)
{ return x * {0} } </script>", aMagicValue)
// this contrived example would work
string.Format(@"<script> function test(x)
{{ return x * {0} }} </script>", aMagicValue)
...
php $_POST array empty upon form submission
...en posting from HTTP to HTTPS, the $_POST comes empty.
This happened while testing the form, but took me a while until I realize that.
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Get file name from URL
...io:
import org.apache.commons.io.FilenameUtils;
public class FilenameUtilTest {
public static void main(String[] args) throws Exception {
URL url = new URL("http://www.example.com/some/path/to/a/file.xml?foo=bar#test");
System.out.println(FilenameUtils.getBaseName(url.getPath...
What do 'lazy' and 'greedy' mean in the context of regular expressions?
...
'Greedy' means match longest possible string.
'Lazy' means match shortest possible string.
For example, the greedy h.+l matches 'hell' in 'hello' but the lazy h.+?l matches 'hel'.
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What is the actual use of Class.forName(“oracle.jdbc.driver.OracleDriver”) while connecting to a dat
... is in the "WEB-INF\lib" directory, if you are using Tomcat. Save this as test.jsp and put it in your web directory, and redeploy your web app folder in Tomcat manager:
<%@ page import="java.sql.*" %>
<HTML>
<HEAD>
<TITLE>Simple JSP Oracle Test</TITLE>
</HEAD>&...
What Computer Science concepts should I know? [closed]
...lers, generate release notes and tag the code in source control
Automated testing
Understands and is able to setup automated functional, load/performance and UI tests
Problem Decomposition
Use of appropriate data structures and algorithms and comes up with generic/object-oriented code that enc...
How to close TCP and UDP ports via windows command line
...
I tested on Windows 10 and it does not kill the TCP Connection alone but the whole Process or Thread using it. As Victor stated that's not his goal.
– Sebastian
Feb 7 '19 at 10:45
...
How to declare a variable in MySQL?
...arameters
inside a stored procedure:
DELIMITER //
CREATE PROCEDURE sp_test(var1 INT)
BEGIN
DECLARE start INT unsigned DEFAULT 1;
DECLARE finish INT unsigned DEFAULT 10;
SELECT var1, start, finish;
SELECT * FROM places WHERE place BETWEEN start AND finish;
END; //
DEL...
Removing white space around a saved image in matplotlib
...ite space padding by setting bbox_inches="tight" in savefig:
plt.savefig("test.png",bbox_inches='tight')
You'll have to put the argument to bbox_inches as a string, perhaps this is why it didn't work earlier for you.
Possible duplicates:
Matplotlib plots: removing axis, legends and white spac...