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R object identification

I am often ending up with a function producing output for which I don't understand the output data type. I'm expecting a list and it ends up being a list of lists or a data frame or something else. What's a good method or workflow for figuring out the output data type when first using a function? ...
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Select second last element with css

I already know of :last-child. But is there a way to select the div: 2 Answers 2 ...
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how to view the contents of a .pem certificate

I am using Java keytool . I have exported a self-signed .pem certificate from my keystore. Is there a command to view the certificate details directly from the .pem file (not of the certificate in the keystore)? ...
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PHP namespaces and “use”

I am having a little trouble with namespaces and the use statements. 2 Answers 2 ...
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Array initializing in Scala

I'm new to Scala ,just started learning it today.I would like to know how to initialize an array in Scala. 6 Answers ...
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Obtain Bundle Identifier programmatically

How can I obtain a string of the Bundle Identifier programmatically from within my App? 6 Answers ...
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How to get jQuery dropdown value onchange event

I have added two jQuery UI Dropdown Autocomplete script. Now I want get both value onchange of second dropdown and want to store separately in variable. How it is possible? ...
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Will Dispose() be called in a using statement with a null object?

Is it safe to use the using statement on a (potentially) null object? Consider the following example: 5 Answers ...
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Is == in PHP a case-sensitive string comparison?

I was unable to find this on php.net. Is the double equal sign ( == ) case sensitive when used to compare strings in PHP? 7...
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Running two projects at once in Visual Studio

I created a solution in Visual C# 2010 Express that contains two projects: one is the client, the other is the server. I would like to debug both at the same time, but I can only seem to run one of the projects during debugging. ...