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“unrecognized selector sent to instance” error in Objective-C
I created a button and added an action for it, but as soon as it invoked, I got this error:
38 Answers
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Java ByteBuffer to String
Is this a correct approach to convert ByteBuffer to String in this way,
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How can I get System variable value in Java?
How can I get the System Variable value which is present in
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Display names of all constraints for a table in Oracle SQL
I have defined a name for each of the constraint for the multiple tables that I have created in Oracle SQL.
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Overriding fields or properties in subclasses
...d I want to declare a field or a property that will have a different value in each class that inherits from this parent class.
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What is this 'Lambda' everyone keeps speaking of?
What is this 'Lambda' everyone keeps speaking of? A lot of people seem to love it, but all I can gather from it is it is just a way of cramming lots of lines of code into a single expression.
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Array.Copy vs Buffer.BlockCopy
Array.Copy and Buffer.BlockCopy both do the same thing, but BlockCopy is aimed at fast byte-level primitive array copying, whereas Copy is the general-purpose implementation. My question is - under what circumstances should you use BlockCopy ? Should you use it at any time when you are copyi...
General suggestions for debugging in R
I get an error when using an R function that I wrote:
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Getting jQuery to recognise .change() in IE
I'm using jQuery to hide and show elements when a radio button group is altered/clicked. It works fine in browsers like Firefox, but in IE 6 and 7, the action only occurs when the user then clicks somewhere else on the page.
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Proper use of beginBackgroundTaskWithExpirationHandler
I'm a bit confused about how and when to use beginBackgroundTaskWithExpirationHandler .
5 Answers
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