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How do I find duplicate values in a table in Oracle?
... over 4 years later, still works well, and can be adjusted for selecting multiple columns as long as those are also in the group by, as in: select column_one, column_two, count(*) from tablename group by column_one, column_two having count(column_one) > 1; etc.
– Amos M. Car...
javac option to compile all java files under a given directory recursively
... create a simple build.xml file that describes how to build the software:
<project default="compile">
<target name="compile">
<mkdir dir="bin"/>
<javac srcdir="src" destdir="bin"/>
</target>
</project>
you can compile the whole software by...
How to get the first non-null value in Java?
...
No, there isn't.
The closest you can get is:
public static <T> T coalesce(T ...items) {
for(T i : items) if(i != null) return i;
return null;
}
For efficient reasons, you can handle the common cases as follows:
public static <T> T coalesce(T a, T b) {
return...
jquery select change event get selected option
...
How to check in case of multiple select?
– Hemant_Negi
May 25 '15 at 5:34
3
...
Reading my own Jar's Manifest
...tion of URLs, reading them as manifests until you find yours:
Enumeration<URL> resources = getClass().getClassLoader()
.getResources("META-INF/MANIFEST.MF");
while (resources.hasMoreElements()) {
try {
Manifest manifest = new Manifest(resources.nextElement().openStream());
/...
How to set up a Subversion (SVN) server on GNU/Linux - Ubuntu [closed]
...etc/apache2/ports.conf
Add or check that the following is in the file:
<IfModule mod_ssl.c>
Listen 443
</IfModule>
3: Generate an SSL certificate:
sudo apt-get install ssl-cert
sudo mkdir /etc/apache2/ssl
sudo /usr/sbin/make-ssl-cert /usr/share/ssl-cert/ssleay.cnf /etc/apache2/...
How to create our own Listener interface in android?
...ter as per your requirement
public void callback(View view, String result);
}
In your activity, implement the interface:
MyActivity.java:
public class MyActivity extends Activity implements MyListener {
@override
public void onCreate(){
MyButton m = new MyButton(this);
...
Maximum number of characters using keystrokes A, Ctrl+A, Ctrl+C and Ctrl+V
... trick here: the contents are still in the clipboard, so we can paste it multiple times without copying each time). We only have to consider up to 4 consecutive pastes, since select, copy, paste x 5 is equivalent to select, copy, paste, select, copy, paste and the latter is better since it leaves us...
How to check for valid email address? [duplicate]
...sen that up a lot. I've had to deal with email addresses that that would filter out (e.g. with /, seen in a University's addresses). Another whole class that you're entirely blocking are internationalised domain names. Really, there's no good reason to block valid email addresses. I'll begrudgingly ...
How do you use bcrypt for hashing passwords in PHP?
...le with hardware (via a configurable number of rounds). Its slowness and multiple rounds ensures that an attacker must deploy massive funds and hardware to be able to crack your passwords. Add to that per-password salts (bcrypt REQUIRES salts) and you can be sure that an attack is virtually unfeasib...