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How to prove that a problem is NP complete?
...o NP (that is that given a solution you can verify it in polynomial time)
Select a known NP-complete problem L'
Describe an algorithm f that transforms L' into L
Prove that your algorithm is correct (formally: x ∈ L' if and only if f(x) ∈ L )
Prove that algo f runs in polynomial time
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How do I specify the Linq OrderBy argument dynamically?
...rn str + (isDesc ? " descending" : "");
}
}
3) Write your switch for selecting of Lambda function
public static class SortHelper
{
public static Expression<Func<UserApp, object>> UserApp(string orderProperty)
{
orderProperty = orderProperty?.ToLowerInvariant();
...
How to get an element by its href in jquery?
...
Yes, you can use jQuery's attribute selector for that.
var linksToGoogle = $('a[href="http://google.com"]');
Alternatively, if your interest is rather links starting with a certain URL, use the attribute-starts-with selector:
var allLinksToGoogle = $('a[hre...
What does it mean when MySQL is in the state “Sending data”?
...
In this state:
The thread is reading and processing rows for a
SELECT statement, and sending data to the client.
Because operations occurring during this this state tend to perform
large amounts of disk access (reads).
That's why it takes more time to complete and so is the lon...
Resizing an image in an HTML5 canvas
...
Try pica - that's a highly optimized resizer with selectable algorythms. See demo.
For example, original image from first post is resized in 120ms with Lanczos filter and 3px window or 60ms with Box filter and 0.5px window. For huge 17mb image 5000x3000px resize takes ~1s ...
How do I get the localhost name in PowerShell?
...ComputerSystem get Name
Powershell
Get-WMIObject Win32_ComputerSystem | Select-Object -ExpandProperty name
and ...
hostname.exe
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What does 'COLLATE SQL_Latin1_General_CP1_CI_AS' do?
...e a SQL_Latin1_General_CI_AS. Rather, there is a Latin1_General_CI_AS. See SELECT * FROM fn_helpcollations() where name IN ('SQL_Latin1_General_CP1_CI_AS','Latin1_General_CI_AS','SQL_Latin1_General_CI_AS');. There are subtle differences regarding sorting and comparison as between the two collations....
Foreign Key to multiple tables
...ulkon I know this is an old question but the query would be something like SELECT t.Subject AS ticketSubject, CASE WHEN u.Name IS NOT NULL THEN u.Name ELSE g.Name END AS ticketOwnerName FROM Ticket t INNER JOIN Party p ON t.Owner=p.PartyId LEFT OUTER JOIN User u ON u.ID=p.PartyId LEFT OUTER JOIN Gro...
How to escape % in String.Format?
...and I want to use String.Format to build the final string in code. The SELECT statement uses a like, something like this:
...
How to handle Handler messages when activity/fragment is paused
...iving an Intent(message) that was sent to your app in general. To increase selectivity on what type of intents your fragment can receive you can use an intent filter as in the example below.
An advantage of this approach is that the Intent(message) can be sent from everywhere whithin your app(a d...