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self referential struct definition?

I haven't been writing C for very long, and so I'm not sure about how I should go about doing these sorts of recursive things... I would like each cell to contain another cell, but I get an error along the lines of "field 'child' has incomplete type". What's up? ...
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How do I create an empty array in YAML?

Is there any way to specify that empty_array: is an array with no elements, such as with [] ? When I load it into a ruby hash I'd like it to know that it's an array. ...
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Best way to generate random file names in Python

In Python, what is a good, or the best way to generate some random text to prepend to a file(name) that I'm saving to a server, just to make sure it does not overwrite. Thank you! ...
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biggest integer that can be stored in a double

What is the biggest "no-floating" integer that can be stored in an IEEE 754 double type without losing precision ? 7 Answer...
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UIView bottom border?

To a UIScrollView *toScrollView (which is the width of the screen), I want to add a gray bottom border (exactly like that of the to-field of the compose view of the iPhone's native Messages app). ...
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What is the fastest way to check if a class has a function defined?

I'm writing an AI state space search algorithm, and I have a generic class which can be used to quickly implement a search algorithm. A subclass would define the necessary operations, and the algorithm does the rest. ...
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#ifdef vs #if - which is better/safer as a method for enabling/disabling compilation of particular s

This may be a matter of style, but there's a bit of a divide in our dev team and I wondered if anyone else had any ideas on the matter... ...
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Is it possible to solve the “A generic array of T is created for a varargs parameter” compiler warni

This is a simplified version of the code in question, one generic class uses another class with generic type parameters and needs to pass one of the generic types to a method with varargs parameters: ...
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How to calculate the number of days between two dates? [duplicate]

... const oneDay = 24 * 60 * 60 * 1000; // hours*minutes*seconds*milliseconds const firstDate = new Date(2008, 1, 12); const secondDate = new Date(2008, 1, 22); const diffDays = Math.round(Math.abs((firstDate - secondDate) / oneDay)); ...
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Format a number as 2.5K if a thousand or more, otherwise 900

I need to show a currency value in the format of 1K of equal to one thousand, or 1.1K, 1.2K, 1.9K etc, if its not an even thousands, otherwise if under a thousand, display normal 500, 100, 250 etc, using javascript to format the number? ...