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mongodb count num of distinct values per field/key
...aul what Richie said is that if the grouping is done just "regular" field (string, int etc.) then you don't need the unwind step. Isn't it correct?
– guyarad
Oct 19 '17 at 10:00
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What is the most ridiculous pessimization you've seen? [closed]
... data structures so they take up way more memory than they need
Sizing all strings that store file names or paths to MAX_PATH
Gratuitous polling for thing that have events, callbacks or other notification mechanisms
What I think is a better statement is this: "optimization without measuring and un...
Sleep Command in T-SQL?
...
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
var builder = new SqlConnectionStringBuilder();
builder.DataSource = "localhost";
builder.IntegratedSecurity = true;
builder.InitialCatalog = "master";
var connectionString ...
How to bring back “Browser mode” in IE11?
...s Ctrl+8.
On the Document mode list under Mode, click 9.
On the User agent string list under Mode, click Internet Explorer 9.
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How to track down log4net problems
...atic ILog logger = LogManager.GetLogger(typeof(Program));
static void Main(string[] args)
{
logger.InfoFormat("{0} v.{1} started.", Assembly.GetExecutingAssembly().GetName().Name, Assembly.GetExecutingAssembly().GetName().Version.ToString());
With 2.0.8, I had an interesting situation. I creat...
nodeValue vs innerHTML and textContent. How to choose?
...word story right here.</p>
So, that second example parses the string I assign to the DOM element's innerHTML property as HTML.
This is awesome, and a big security vulnerability : )
(look up XSS if you want to know about security for this)
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How to read a single char from the console in Java (as the user types it)?
...jCurses might be interesting, though.
On a Unix system, this might work:
String[] cmd = {"/bin/sh", "-c", "stty raw </dev/tty"};
Runtime.getRuntime().exec(cmd).waitFor();
For example, if you want to take into account the time between keystrokes, here's sample code to get there.
...
Setting JDK in Eclipse
...Hello");
}
}*/
public class LambdaDemo1 {
public static void main(String[] args) {
testI test ;
/*test= new A();
test.show();*/
test = () ->System.out.println("Hello,how are you?"); //lambda
test.show();
}
}
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How do I set a ViewModel on a window in XAML using DataContext property?
...wModel and set it as datacontext. In your statement it just consider it as string value.
<Window x:Class="BuildAssistantUI.BuildAssistantWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x...
Automatically plot different colored lines
... I want them to all be different colors. I have a kludged solution using a string 'rgbcmyk' and stepping through it for each separate plot, but I start having duplicates after 7 iterations. Is there an easier/more efficient way to do this, and with more color options?
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