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Standard deviation of a list
I want to find mean and standard deviation of 1st, 2nd,... digits of several (Z) lists. For example, I have
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Repairing Postgresql after upgrading to OSX 10.7 Lion
I recently upgraded to OSX 10.7, at which point my rails installation completely borked when trying to connect to the psql server. When I do it from the command line using
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Difference Between ViewData and TempData?
I know what ViewData is and use it all the time, but in ASP.NET Preview 5 they introduced something new called TempData.
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Why do assignment statements return a value?
This is allowed:
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Format numbers in django templates
I'm trying to format numbers. Examples:
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Convert Year/Month/Day to Day of Year in Python
I'm using the Python datetime module, i.e.:
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What is the difference between HTML tags and ?
I would like to ask for some simple examples showing the uses of <div> and <span> . I've seen them both used to mark a section of a page with an id or class , but I'm interested in knowing if there are times when one is preferred over the other.
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Why should I use a pointer rather than the object itself?
I'm coming from a Java background and have started working with objects in C++. But one thing that occurred to me is that people often use pointers to objects rather than the objects themselves, for example this declaration:
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Changing password with Oracle SQL Developer
Many of my users do not use SQLPlus. I cannot give them alter user. We expire passwords every 60 days.
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Pandas groupby: How to get a union of strings
I have a dataframe like this:
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