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How to change variables value while debugging with LLDB in Xcode?
...ork in the debugger. lldb probably interprets it as you wanted to access a member of a c-struct, but I'm not sure if this is the reason it won't work. Dot-Syntax doesn't work for po either. instead of po label.text you have to use po [label text]
– Matthias Bauch
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Providing a default value for an Optional in Swift?
... case .None:
return defaultValue
case .Some(let value):
return value
}
}
}
Then you can just do:
optionalValue.or(defaultValue)
However, I recommend sticking to the ternary operator as other developers will understand that much more ...
Select n random rows from SQL Server table
...ber column < 0.1. I'm looking for a simpler way to do it, in a single statement if possible.
16 Answers
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Start service in Android
...via adb logcat, DDMS, or the DDMS perspective in Eclipse) should turn up some warnings that may help.
More likely, you should start the service via:
startService(new Intent(this, UpdaterServiceManager.class));
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What is the difference between Reader and InputStream?
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An InputStream is the raw method of getting information from a resource. It grabs the data byte by byte without performing any kind of translation. If you are reading image data, or any binary file, this is the stream to use.
A Reader is designed f...
What is the main difference between Inheritance and Polymorphism?
... found myself lost. I was reading Head first Java and both definitions seemed to be exactly the same. I was just wondering what the MAIN difference was for my own piece of mind. I know there are a number of similar questions to this but, none I have seen which provide a definitive answer.
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What is the template binding vs binding?
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TemplateBinding is used for binding to the element properties within the template definition. In your example, you could have written
<Border Padding="{Binding Padding}" ...>
meaning to bind the border's padding property to the padding property of... what? You...
JSON.parse vs. eval()
My Spider Sense warns me that using eval() to parse incoming JSON is a bad idea. I'm just wondering if JSON.parse() - which I assume is a part of JavaScript and not a browser-specific function - is more secure.
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Reading GHC Core
Core is GHC's intermediate language. Reading Core can help you better understand the performance of your program. Someone asked me for documentation or tutorials on reading Core, but I couldn't find much.
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Check whether user has a Chrome extension installed
I am in the process of building a Chrome extension, and for the whole thing to work the way I would like it to, I need an external JavaScript script to be able to detect if a user has my extension installed.
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