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What is the “owning side” in an ORM mapping?
...d in the association table PERSON_ID_DOCUMENTS.
On the other hand, if we call idDocument.setPerson(person), we change the foreign key person_id on table ID_DOCUMENTS. Hibernate is creating two unidirectional (foreign key) relations on the database, to implement one bidirectional object relation.
H...
how to ignore namespaces with XPath
...re sometimes client-generated i.e. unknown to me. Then i am left with basically three choices :
5 Answers
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Explain which gitignore rule is ignoring my file
...e googling and found that back in 2009 this feature was requested and partially implemented. After reading the thread, I realised it would not be too much work to do it properly, so I have started work on a patch and hope to have it finished in the next day or two. I will update this answer when i...
How to navigate through a vector using iterators? (C++)
...o move an iterator forward n spaces is not to write your own loop, but to call std::advance(it, n). It's defined to do exactly what you want, and it will automatically use it + n if the iterator is tagged as random-access, or do the loop if it has to.
– Steve Jessop
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Apply multiple functions to multiple groupby columns
...ion.
I recommend making a single custom function that returns a Series of all the aggregations. Use the Series index as labels for the new columns:
def f(x):
d = {}
d['a_sum'] = x['a'].sum()
d['a_max'] = x['a'].max()
d['b_mean'] = x['b'].mean()
d['c_d_prodsum'] = (x['c'] * x['d...
How to work with complex numbers in C?
...h:
creal(z1): get the real part (for float crealf(z1), for long double creall(z1))
cimag(z1): get the imaginary part (for float cimagf(z1), for long double cimagl(z1))
Another important point to remember when working with complex numbers is that functions like cos(), exp() and sqrt() must be repl...
Truncating long strings with CSS: feasible yet?
... cross browser CSS solution. It does come with the downside however of not allowing the text to be selected in Firefox. Check out his guest post on Matt Snider's blog for the full details on how this works.
Note this technique also prevents updating the content of the node in JavaScript using the i...
The written versions of the logical operators
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I personally think they are much better... but then I am Python biased. I don't know why some people thing that if it's not garbled it's not code...
– Matthieu M.
Mar 4 '10 at 8:28
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How to port data-only volumes from one host to another?
...Docker documentation on Working with Volumes there is the concept of so-called data-only containers, which provide a volume that can be mounted into multiple other containers, no matter whether the data-only container is actually running or not.
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Check if an element's content is overflowing?
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The element may be overflown vertically, horizontally or both. This function will return you a boolean value if the DOM element is overflown:
function isOverflown(element) {
return element.scrollHeight > element.clientHeight || element.scrollWidth > e...