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Should private helper methods be static if they can be static

Let's say I have a class designed to be instantiated. I have several private "helper" methods inside the class that do not require access to any of the class members, and operate solely on their arguments, returning a result. ...
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System.IO.Packaging

I have my project set to .NET Framework 4.0. When I add System.IO.Packaging , it says that it doesn't exist. It also doesn't show up when I try to add it as a reference to the project. ...
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How to check if PHP array is associative or sequential?

PHP treats all arrays as associative, so there aren't any built in functions. Can anyone recommend a fairly efficient way to check if an array contains only numeric keys? ...
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Test whether string is a valid integer

I'm trying to do something common enough: Parse user input in a shell script. If the user provided a valid integer, the script does one thing, and if not valid, it does something else. Trouble is, I haven't found an easy (and reasonably elegant) way of doing this - I don't want to have to pick it ap...
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How to insert element into arrays at specific position?

Let's imagine that we have two arrays: 23 Answers 23 ...
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Regular expression for first and last name

For website validation purposes, I need first name and last name validation. 23 Answers ...
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Manifest merger failed : uses-sdk:minSdkVersion 14

Since downloading the latest SDK and installing Android Studio, my project fails to build. I get the following message: 28 ...
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Check if a number has a decimal place/is a whole number

I am looking for an easy way in JavaScript to check if a number has a decimal place in it (in order to determine if it is an integer). For instance, ...
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Check whether number is even or odd

How would I determine whether a given number is even or odd? I've been wanting to figure this out for a long time now and haven't gotten anywhere. ...
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Concatenating two one-dimensional NumPy arrays

I have two simple one-dimensional arrays in NumPy . I should be able to concatenate them using numpy.concatenate . But I get this error for the code below: ...