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doGet and doPost in Servlets
...ould use doPost() when you want to intercept on HTTP POST requests. That's all. Do not port the one to the other or vice versa (such as in Netbeans' unfortunate auto-generated processRequest() method). This makes no utter sense.
GET
Usually, HTTP GET requests are idempotent. I.e. you get exactly t...
Overriding fields or properties in subclasses
...his is how a truly polymorphic implementation of your property might look, allowing the derived classes to be in control.
abstract class Parent
{
abstract public int MyInt { get; }
}
class Father : Parent
{
public override int MyInt
{
get { /* Apply formula "X" and return a val...
Resize fields in Django Admin
...awy to this in a form? I did not find a way to set the attrs attribute for all Textareas.
– Julian
Sep 5 '16 at 11:33
1
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JS: iterating over result of getElementsByClassName using Array.forEach
...on (in modern browsers, at least. Older browsers returned a NodeList).
In all modern browsers (pretty much anything other IE <= 8), you can call Array's forEach method, passing it the list of elements (be it HTMLCollection or NodeList) as the this value:
var els = document.getElementsByClassNam...
Pass a JavaScript function as parameter
... executing it first.
Here is an example:
function addContact(id, refreshCallback) {
refreshCallback();
// You can also pass arguments if you need to
// refreshCallback(id);
}
function refreshContactList() {
alert('Hello World');
}
addContact(1, refreshContactList);
...
Has anyone ever got a remote JMX JConsole to work?
...solution for this:
If your Java process is running on Linux behind a firewall and you want to start JConsole / Java VisualVM / Java Mission Control on Windows on your local machine to connect it to the JMX Port of your Java process.
You need access to your linux machine via SSH login. All Communic...
How to echo shell commands as they are executed
In a shell script, how do I echo all shell commands called and expand any variable names?
13 Answers
...
How to send a stacktrace to log4j?
...
I never know what to stuff into the first String, usually I just end up doing log.error(e.getLocalizedMessage(), e) which is totally redundant. Does it handle a null for the first argument?
– Mark Peters
Dec 3 '10 at 16:52
...
How to avoid “RuntimeError: dictionary changed size during iteration” error?
I have checked all of the other questions with the same error yet found no helpful solution =/
11 Answers
...
How to print a query string with parameter values when using Hibernate
...he the following categories:
org.hibernate.SQL - set to debug to log all SQL DML statements as they are executed
org.hibernate.type - set to trace to log all JDBC parameters
So a log4j configuration could look like:
# logs the SQL statements
log4j.logger.org.hibernate.SQL=debug
# Logs the...