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When should I use nil and NULL in Objective-C?
...ails to acknowledge that [NSNull null] is a very different beast. To quote from NSNull Class Reference, "The NSNull class defines a singleton object used to represent null values in collection objects (which don’t allow nil values)." Also see Using NSNull section of Number and Value Programming To...
ERROR 2003 (HY000): Can't connect to MySQL server on '127.0.0.1' (111)
...Manager -> Services -> Open Services)
Search for MySQL and Start it from the top navigation bar.
Then if try to open mysql.exe it will work.
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Determine if an element has a CSS class with jQuery
...
from the FAQ
elem = $("#elemid");
if (elem.is (".class")) {
// whatever
}
or:
elem = $("#elemid");
if (elem.hasClass ("class")) {
// whatever
}
...
What is the difference between & and && in Java?
... if any of the two bits is 1 and it returns 0 if any of the bits is 0.
From the wiki page:
http://www.roseindia.net/java/master-java/java-bitwise-and.shtml
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EOFError: end of file reached issue with Net::HTTP
...is recently and eventually found that this was caused by a network timeout from the endpoint we were hitting. Fortunately for us we were able to increase the timeout duration.
To verify this was our issue (and actually not an issue with net http), I made the same request with curl and confirmed ...
Node.js Error: Cannot find module express
... project directory. So you should copy the file the express module folders from C:\Users\Dmitry\AppData\Roaming\npm\node_modules\ to your project directory as : C:\ChatServer\Server\node_modules. If you do not have a folder named 'node_modules' in your project folder, then create it first and paste ...
Adding a new array element to a JSON object
I have a JSON format object I read from a JSON file that I have in a variable called teamJSON, that looks like this:
6 Answ...
How to get JS variable to retain value after page refresh? [duplicate]
...ndow.name has another interesting property: it's visible to windows served from other domains; it's not subject to the same-origin policy like nearly every other property of window. So, in addition to storing "semi-persistent" data there while the user navigates or refreshes the page, you can also u...
Understanding dict.copy() - shallow or deep?
...swer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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Favorite Visual Studio keyboard shortcuts [closed]
...ard shortcut? I'm always up for leaving my hands on the keyboard and away from the mouse!
124 Answers
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