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When to Redis? When to MongoDB? [closed]
...lets you give it a key and look up a single value. Redis itself can store strings, lists, hashes, and a few other things; however, it only looks up by name.
Cache invalidation is one of computer science's hard problems; the other is naming things. That means you'll use Redis when you want to avoi...
How can I use different certificates on specific connections?
...eArrayInputStream derInputStream = new ByteArrayInputStream(app.certificateString.getBytes());
CertificateFactory certificateFactory = CertificateFactory.getInstance("X.509");
X509Certificate cert = (X509Certificate) certificateFactory.generateCertificate(derInputStream);
String alias = "alias";//ce...
How do you convert an entire directory with ffmpeg?
...you could use Bash parameter substitution if you would like to replace the string "x265" with "x264" if you're transcoding from H.265 to H.264 which is a common use case. for f in *.mkv; do ffmpeg -i "$f" -map 0 -movflags faststart -c:v libx264 -c:a copy -c:s copy "${f/x265/x264}"; done
...
Read properties file outside JAR file
... * the ./main.properties file of the base folder
*
* @return app.version string
* @throws IOException
*/
import java.util.Properties;
public static String getAppVersion() throws IOException{
String versionString = null;
//to load application's properties, we use this class
Proper...
Java Reflection: How to get the name of a variable?
...For example, take this simple class:
class TestLocalVarNames {
public String aMethod(int arg) {
String local1 = "a string";
StringBuilder local2 = new StringBuilder();
return local2.append(local1).append(arg).toString();
}
}
After compiling with javac -g:vars TestL...
Why does comparing strings using either '==' or 'is' sometimes produce a different result?
...
@AlexanderSupertramp, because of string interning.
– Chris Rico
Feb 1 '15 at 9:34
...
Declaring an unsigned int in Java
... original purpose of Java. But for example Smartphones do not dispose with extra memory. And they usually use Java, as far as I know. But well, I don't want to start a war between Java programers and the others.
– Tomáš Zato - Reinstate Monica
Jun 18 '13 at 8...
Does using “new” on a struct allocate it on the heap or stack?
...tructor (e.g. new Guid()) or a parameterful constructor (e.g. new Guid(someString)). These generate significantly different IL. To understand why, you need to compare the C# and CLI specs: according to C#, all value types have a parameterless constructor. According to the CLI spec, no value types ha...
How do I create a copy of an object in PHP?
... you said that only primitive member variables gets copied: are PHP arrays/strings considered primitive member variables, so they get copied, am I right?
– Marco Demaio
Jul 11 '10 at 10:48
...
Xcode: What is a target and scheme in plain language?
...y project has two targets, a "normal" build and an "office" build that has extra testing features and may contain several background music tracks and a button to change the track (as it currently does).
You'll be used to adding classes and resources to your default target as you add them.
You can pi...