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How do I get the MAX row with a GROUP BY in LINQ query?
... {
var q = from t in dc.TableTests
group t by t.SerialNumber
into g
select new
{
SerialNumber = g.Key,
uid = (from t2 in g select t2.uid).Ma...
Who architected / designed C++'s IOStreams, and would it still be considered well-designed by today'
... @stakx: Nevertheless it is getting deprecated and superseded by unique_ptr with clearer and more powerful semantics.
– UncleBens
May 2 '10 at 10:47
3
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What are the security risks of setting Access-Control-Allow-Origin?
...
By responding with Access-Control-Allow-Origin: *, the requested resource allows sharing with every origin. This basically means that any site can send an XHR request to your site and access the server’s response which woul...
Environment variables in Mac OS X
...
There's no need for duplication. You can set environment variables used by launchd (and child processes, i.e. anything you start from Spotlight) using launchctl setenv.
For example, if you want to mirror your current path in launchd after setting it up in .bashrc or wherever:
PATH=whatever:you:...
Rails server says port already used, how to kill that process?
...
You can also find the PID by navigating through your rails directory to the following file tmp/pids/server.pid
– tandy
Feb 15 '14 at 19:29
...
How to use OrderBy with findAll in Spring Data
...t;StudentEntity, Integer> {
public List<StudentEntity> findAllByOrderByIdAsc();
}
The code above should work. I'm using something similar:
public List<Pilot> findTop10ByOrderByLevelDesc();
It returns 10 rows with the highest level.
IMPORTANT:
Since I've been told that it's e...
What is the garbage collector in Java?
...he Java Virtual Machine which gets rid of objects which are not being used by a Java application anymore. It is a form of automatic memory management.
When a typical Java application is running, it is creating new objects, such as Strings and Files, but after a certain time, those objects are not u...
How to force Selenium WebDriver to click on element which is not currently visible?
...
Selenium determines an element is visible or not by the following criteria (use a DOM inspector to determine what css applies to your element, make sure you look at computed style):
visibility != hidden
display != none (is also checked against every parent element)
opacit...
Java HTTPS client certificate authentication
...file containing
The client's public certificate (in this instance signed by a self-signed CA)
The client's private key
To generate it I used OpenSSL's pkcs12 command, for example;
openssl pkcs12 -export -in client.crt -inkey client.key -out client.p12 -name "Whatever"
Tip: make sure you get t...
Multiple commands in gdb separated by some sort of delimiter ';'?
...en printed a backtrace, but it doesn't.
You can accomplish the same thing by calling into the Python interpreter.
python import gdb ; print(gdb.execute("s")) ; print(gdb.execute("bt"))
It's possible to wrap this up into a dedicated command, here called "cmds", backed by a python definition.
Here...