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What does .SD stand for in data.table in R
.SD looks useful but I do not really know what I am doing with it. What does it stand for? Why is there a preceding period (full stop). What is happening when I use it?
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Is there a [Go to file…]?
In modern IDEs, there is a keyboard shortcut to open a file by typing its name without putting your hand on the mouse. For example:
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Git error on git pull (unable to update local ref)
I only have branch master and im getting this error every time i try to "git pull":
18 Answers
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“ClickOnce does not support the request execution level 'requireAdministrator.'”
So I was writing an application that requires access to the registry.
I had not touched any build settings, wanting to get the thing working before I added the other touches, such as a description or name.
Out of the blue, I get an error that will not go away. ClickOnce does not support the requ...
JavaScript moving element in the DOM
... How can I swap positions of the first and third <div> ? jQuery is fine.
7 Answers
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Django. Override save for model
Before saving model I'm re-size a picture. But how can I check if new picture added or just description updated, so I can skip rescaling every time the model is saved?
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Get battery level and state in Android
How can I get battery level and state (plugged in, discharging, charging, etc)? I researched the developer docs and I found a BatteryManager class. But it doesn't contain any methods, just constants. How do I even use it?
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How to use multiple @RequestMapping annotations in spring?
Is it possible to use multiple @RequestMapping annotations over a method?
7 Answers
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How to get the request parameters in Symfony 2?
I am very new to symfony. In other languages like java and others I can use request.getParameter('parmeter name') to get the value.
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How can I launch Safari from an iPhone app?
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should be the following :
NSURL *url = [NSURL URLWithString:@"http://www.stackoverflow.com"];
if (![[UIApplication sharedApplication] openURL:url]) {
NSLog(@"%@%@",@"Failed to open url:",[url description]);
}
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