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Does using “new” on a struct allocate it on the heap or stack?
...ssignment to a field or use as a method argument.
call instance: Uses an already-allocated storage location (whether on the stack or not). This is used in the code above for assigning to a local variable. If the same local variable is assigned a value several times using several new calls, it just i...
How should I ethically approach user password storage for later plaintext retrieval?
...between them, so they're still recognizable and typeable by anyone who can read). Six random words of varying length are probably easier to type correctly and with confidence than 10 random characters, and they can have a higher entropy as well. For example, the entropy of a 10 character password d...
How to use timeit module
...d so that one pass at an in-place sort doesn't affect the next pass with already sorted data (that, of course, would make the Timsort really shine because it performs best when the data already partially ordered).
Here is an example of how to set up a test for sorting:
>>> import timeit
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How do you calculate the average of a set of circular data? [closed]
...a set of circular data. For example, I might have several samples from the reading of a compass. The problem of course is how to deal with the wraparound. The same algorithm might be useful for a clockface.
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What is the Sign Off feature in Git for?
...winding up in the kernel tree; the signoff indicates the chain of custody. Read the certificate of origin that I linked to; that's what it means when you add a signoff line. The "Author" header may be inaccurate, and doesn't necessarily imply agreement with everything in the certificate of origin.
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What does Docker add to lxc-tools (the userspace LXC tools)?
If you take a look at Docker's features, most of them are already provided by LXC.
5 Answers
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Declaring a custom android UI element using XML
...ote that you should not use anything in android.R.styleable, as per this thread it may change in the future. It is still in the documentation as being to view all these constants in the one place is useful.
3. Use it in a layout files such as layout\main.xml
Include the namespace declaration xmlns...
List of Big-O for PHP functions
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@Kendall: Thanks! I did a bit of reading and it turns out PHP uses 'nested' hashtables for collisions. That is, instead of a logn structure for collisions it simply uses another hashtable. And I do understand that practically speaking PHP hashtables give O(...
In C++, is it still bad practice to return a vector from a function?
...se the compiler does it anyway. Of course there are caveats, so you should read that article.
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Data access object (DAO) in Java
...d to access data from every source (DBMS, XML and so on). I suggest you to read some examples, like this one:
DAO Example
Please note that there are different ways to implements the original DAO Pattern, and there are many frameworks that can simplify your work. For example, the ORM (Object Relati...