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What is the !! (not not) operator in JavaScript?
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Converts Object to boolean. If it was falsey (e.g. 0, null, undefined, etc.), it will be false, otherwise, true.
!oObject // inverted boolean
!!oObject // non inverted boolean so true boolean representation
So !! is not an operator, it's just the ! ope...
Obstructed folders in Subversion
...ted" mean when you try to check into Subversion? I see two folders in red with text status of "obstructed." I don't see what this means anywhere in the docs.
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Should all Python classes extend object?
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In Python 2, not inheriting from object will create an old-style class, which, amongst other effects, causes type to give different results:
>>> class Foo: pass
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>>> type(Foo())
<type 'instance'>
vs.
>>> cl...
Visual Studio 2013 hangs when opening a solution
...21005.1) and added ReSharper 8 (v8.0.2000.2660) a day or two ago. That day it was fine. Now I'm lucky if I can get it to open one solution in a whole day. It opens OK by itself, but when I try and open a solution from within - via the menu - it hangs, badly. If I right-click a solution in Windows Ex...
Writing Unicode text to a text file?
I'm pulling data out of a Google doc, processing it, and writing it to a file (that eventually I will paste into a Wordpress page).
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Who architected / designed C++'s IOStreams, and would it still be considered well-designed by today'
First off, it may seem that I'm asking for subjective opinions, but that's not what I'm after. I'd love to hear some well-grounded arguments on this topic.
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Why maven? What are the benefits? [closed]
What are the main benefits of using maven compared to let's say ant ?
It seems to be more of a annoyance than a helpful tool.
I use maven 2, with plain Eclipse Java EE (no m2eclipse), and tomcat.
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How do you performance test JavaScript code?
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Profilers are definitely a good way to get numbers, but in my experience, perceived performance is all that matters to the user/client. For example, we had a project with an Ext accordion that expanded to show some data and then a few nested Ex...
How to safely call an async method in C# without await
... exception "asynchronously", you could do:
MyAsyncMethod().
ContinueWith(t => Console.WriteLine(t.Exception),
TaskContinuationOptions.OnlyOnFaulted);
This will allow you to deal with an exception on a thread other than the "main" thread. This means you don't have to "wait" for the...
In a storyboard, how do I make a custom cell for use with multiple controllers?
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As I understand it, you want to:
Design a cell in IB which can be used in multiple storyboard scenes.
Configure unique storyboard segues from that cell, depending on the scene the cell is in.
Unfortunately, there is currently no way to d...