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Why does Eclipse Java Package Explorer show question mark on some classes?
In the Eclipse Helios Java Package Explorer, I see the Java class icons display a small question mark to the right of the 'J', something like [J?]. This icon is shown on each class within one package in my project, but I cannot find an explanation for this in the documentation.
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Shell script to delete directories older than n days
...Explanation:
find: the unix command for finding files / directories / links etc.
/path/to/base/dir: the directory to start your search in.
-type d: only find directories
-ctime +10: only consider the ones with modification time older than 10 days
-exec ... \;: for each such result found, do the fo...
PHP page redirect [duplicate]
Can PHP make a redirect call after executing a function? I am creating a function on the completion of which I want it to redirect to a file located in the same root folder. Can it be done?
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Difference between the Facade, Proxy, Adapter and Decorator design patterns? [closed]
...e are solving here is that of non-compatible interfaces.
Facade is more like a simple gateway to a complicated set of functionality. You make a black-box for your clients to worry less i.e. make interfaces simpler.
Proxy provides the same interface as the proxied-for class and typically does some ...
Best practice to validate null and empty collection in Java
...erify whether a collection is empty and null . Could anyone please let me know the best practice.
9 Answers
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how does array[100] = {0} set the entire array to 0?
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As for what sort of code the compiler might generate when you do this, take a look at this question: Strange assembly from array 0-initialization
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When should I choose Vector in Scala?
...s at the head are slower than List (though not by as much as you might think)
Another downside before Scala 2.10 was that pattern matching support was better for List, but this was rectified in 2.10 with generalized +: and :+ extractors.
There is also a more abstract, algebraic way of approaching...
JavaScript string encryption and decryption?
...ncrypted = CryptoJS.AES.encrypt("Message", "Secret Passphrase");
//U2FsdGVkX18ZUVvShFSES21qHsQEqZXMxQ9zgHy+bu0=
var decrypted = CryptoJS.AES.decrypt(encrypted, "Secret Passphrase");
//4d657373616765
document.getElementById("demo1").innerHTML = encrypted;
document.getElementById("demo2").i...
java SSL and cert keystore
How does my java program know where my keystore containing the certificate is? Or alternatively how do I tell my java program where to look for the keystore?
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Is Enabling Double Escaping Dangerous?
...cally: IIS is being excessively paranoid. You can safely disable this check if you're not doing anything particularly unwise with the uri decoded data (such as generating local filesystem URI's via string concatenation).
To disable the check do the following (from here): (see my comment below for ...