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When to use PNG or JPG in iPhone development?
...
PNG's are pixel perfect (non-lossy), and require very little extra CPU energy to display. However, large PNGs may take longer to read from storage than more compressed image formats, and thus be slower to display.
JPG's are smaller to store, but lossy (amount depends on compression l...
How to get thread id from a thread pool?
...rt java.util.concurrent.*;
class ThreadIdTest {
public static void main(String[] args) {
final int numThreads = 5;
ExecutorService exec = Executors.newFixedThreadPool(numThreads);
for (int i=0; i<10; i++) {
exec.execute(new Runnable() {
public void run() {
...
Get top n records for each group of grouped results
... := 0) AS vars. I get the idea is to declare empty variables, but it seems extraneous for MySql.
– Joseph Cho
Jun 6 '18 at 18:42
1
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Android List Preferences: have summary as selected value?
... android:defaultValue="0" />
Android will replace %s with the current string value of the preference, as displayed by the ListPreference's picker. The list's summary will also be set correctly when you enter the activity—you don't have to write any special code to set it up initially.
This ...
Can an ASP.NET MVC controller return an Image?
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Use the base controllers File method.
public ActionResult Image(string id)
{
var dir = Server.MapPath("/Images");
var path = Path.Combine(dir, id + ".jpg"); //validate the path for security or use other means to generate the path.
return base.File(path, "image/jpeg");
}
As a...
JavaScript module pattern with example [closed]
...y builds the project for CSS pre-processors. So it is just about adding an extra task for Grunt/Gulp...
– Dmitry Sheiko
Aug 12 '14 at 12:01
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Why doesn't Java support unsigned ints?
...er performance rather than assuming it to be true. It is possible that the extra jiggery-pokery required to manipulate shorts rather than ints (which is usually the type that the processor 'likes to use') could actually be detrimental to performance in a particular application. Not always, but you s...
Load RSA public key from file
...y.spec.*;
public class PrivateKeyReader {
public static PrivateKey get(String filename)
throws Exception {
byte[] keyBytes = Files.readAllBytes(Paths.get(filename));
PKCS8EncodedKeySpec spec =
new PKCS8EncodedKeySpec(keyBytes);
KeyFactory kf = KeyFactory.getInstance("RSA");...
Why doesn't .NET/C# optimize for tail-call recursion?
...
performance, but about ability to run at all.
Also let me mention (as extra info), When we are generating a compiled lambda using expression classes in System.Linq.Expressions namespace, there is an argument named 'tailCall' that as explained in its comment it is
A bool that indicates if ta...
Android: remove notification from notification bar
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private static final int MY_NOTIFICATION_ID= 1234; String ns = Context.NOTIFICATION_SERVICE; NotificationManager mNotificationManager; mNotificationManager = (NotificationManager) getSystemService(ns); mNotificationManager.notify(MY_NOTIFICATION_ID, notification); The example...