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(this == null) in C#!
...on earlier today.
Marc's great answer to that question indicates that according to the spec (section 7.5.7), you shouldn't be able to access this in that context and the ability to do so in C# 3.0 compiler is a bug. C# 4.0 compiler is behaving correctly according to the spec (even in Beta 1, this ...
Java Singleton and Synchronization
...f (r == null) {
synchronized (lock) { // While we were waiting for the lock, another
r = instance; // thread may have instantiated the object.
if (r == null) {
r = new YourObject();
instance = r;
}
}
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Convert absolute path into relative path given a current directory using Bash
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Using realpath from GNU coreutils 8.23 is the simplest, I think:
$ realpath --relative-to="$file1" "$file2"
For example:
$ realpath --relative-to=/usr/bin/nmap /tmp/testing
../../../tmp/testing
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Why seal a class?
...what is the motivation behind the bulk of sealed classes in the .Net framework. What is the benefit of sealing a class? I cannot fathom how not allowing inheritance can be useful and most likely not the only one fighting these classes.
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Can I install Python 3.x and 2.x on the same Windows computer?
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The official solution for coexistence seems to be the Python Launcher for Windows, PEP 397 which was included in Python 3.3.0. Installing the release dumps py.exe and pyw.exe launchers into %SYSTEMROOT% (C:\Windows) which is then associated with p...
Change the color of a bullet in a html list?
All I want is to be able to change the color of a bullet in a list to a light gray. It defaults to black, and I can't figure out how to change it.
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Javascript objects: get parent [duplicate]
...to the same object.
You could also do:
var obj = { subObj: {foo: 'hello world'} };
var obj2 = {};
obj2.subObj = obj.subObj;
var s = obj.subObj;
You now have three references, obj.subObj, obj2.subObj, and s, to the same object. None of them is special.
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AngularJS: How to run additional code after AngularJS has rendered a template?
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Thanks, that's very helpful. This is the best solution for me because it doesn't require dom manipulation from the controller, and will still work when the data is updated from a truly asynchronous service response (and I don't have to use $evalAsync in my controller).
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How do I enable/disable log levels in Android?
I am having lots of logging statements to debug for example.
17 Answers
17
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How can I call controller/view helper methods from the console in Ruby on Rails?
... script/console , sometimes I want to play with the output of a controller or a view helper method.
14 Answers
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