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How to make rounded percentages add up to 100%
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The goal of rounding is to generate the least amount of error. When you're rounding a single value, that process is simple and straightforward and most people understand it easily. When you're rounding multiple numbers at the same time, the process gets trickier - ...
Function pointers, Closures, and Lambda
...les. The collection of free variables is often called the environment, at least by programming-language theorists.
A closure is just an aggregate containing a function and an environment. In the Standard ML of New Jersey compiler, we represented one as a record; one field contained a pointer to...
Group vs role (Any real difference?)
...you to specify whether the collection at issue is a "group" or a "role" at least for the sake of discussion.
Some analogies might help. Framed in terms of set theory, when group alpha is a subset of group beta, then permissions alpha are a superset of permissions beta. Compared to genealogy, if gro...
How to encrypt/decrypt data in php?
... PHP. I made some online research and some of them were quite confusing(at least for me).
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What are good alternatives to SQL (the language)? [closed]
...ecial-casing for empty results) and either write DISTINCT everywhere or at least wherever I need to use COUNT.
– reinierpost
Oct 29 '10 at 8:12
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Code-first vs Model/Database-first [closed]
... Model First doesn't support user-defined SQL functions (at least in EF4, don't know if this has changed). With Database First, you can import UDFs and use them in your LINQ queries.
– Tsahi Asher
Apr 16 '14 at 20:30
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Are list-comprehensions and functional functions faster than “for loops”?
...ich is of course slow to some extent
list-comprehension not only spent the least time building the list, it also makes sum much quicker, in contrast to map
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Where is array's length property defined?
...ss itself does, yes - because it holds a reference to a char[] (or did, at least; I don't know whether it still does, off-hand). So while a StringBuilder is responsible for more memory, its immediate size and layout are fixed.
– Jon Skeet
Sep 20 '14 at 22:08
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Is using Random and OrderBy a good shuffle algorithm?
...(< 128), the algorithm is very biased (4-8%). With 3 values you need at least r.Next(1024). If you make the array bigger (4 or 5), then even r.Next(1024) isn't enough. I'm not an expert in shuffling and in math, but I think that for each extra bit of length of the array, you need 2 extra bits of ...
STL or Qt containers?
...wth, which is more wasteful), but it's important to note that you could at least implement this feature, if need be.
The same is true of doubly linked lists, which could use XOr linking to drastically reduce space used. Again, this is impossible with Qt, due to it's requirements for growth and COW.
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