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What is the difference between Unidirectional and Bidirectional JPA and Hibernate associations?
...up.users. But it would make Hibernate to fetch all elements of Group.users from the database!
So, I can't agree with the recommendation from the Best Practices. You need to design bidirectional relationships carefully, considering use cases (do you need navigational access in both directions?) and...
Using Java 8 to convert a list of objects into a string obtained from the toString() method
...I can iterate with a stream over a list of objects and then sum the values from a specific field of the Object 's instances. E.g.
...
What is the most effective way for float and double comparison?
...hen looking at floating point comparison.
The following definitions are from The art of computer programming by Knuth:
bool approximatelyEqual(float a, float b, float epsilon)
{
return fabs(a - b) <= ( (fabs(a) < fabs(b) ? fabs(b) : fabs(a)) * epsilon);
}
bool essentiallyEqual(float ...
Visual Studio 2013 doesn't discover unit tests
...
Some things I've noticed I have to do from time to time to get tests to show up properly.
If your solution is in a protected drive that you need administrator access to read/write, sometimes only a portion of the tests come up. Definitely run VS as administrato...
How to measure elapsed time in Python?
...est clock available on your platform and version of Python automatically:
from timeit import default_timer as timer
start = timer()
# ...
end = timer()
print(end - start) # Time in seconds, e.g. 5.38091952400282
timeit.default_timer is assigned to time.time() or time.clock() depending on OS. On ...
What are the benefits of functional programming? [closed]
...e the center of a loop, so this and other kinds of overhead are eliminated from your code.
The other major benefit is concurrency, which is easier to do with functional programming because the compiler is taking care of most of the operations which used to require manually setting up state variable...
What's the -practical- difference between a Bare and non-Bare repository?
...master
remotes/origin/HEAD -> origin/master
remotes/origin/master
From the manual page for git clone --bare:
Also the branch heads at the remote
are copied directly to corresponding
local branch heads, without mapping
them to refs/remotes/origin/. When
this option is used, neith...
How do I get a Cron like scheduler in Python? [closed]
...fy your crontab. For example, suppose we define an Event class as below:
from datetime import datetime, timedelta
import time
# Some utility classes / functions first
class AllMatch(set):
"""Universal set - match everything"""
def __contains__(self, item): return True
allMatch = AllMatch...
How to use auto-layout to move other views when a view is hidden?
...onstraints that way if I set UIView property to hidden or I will remove it from superview the two labels will move to the left. I tried to set UIView leading constraint to Superview (Cell content) for 10px and UILabels leading Constraints for 10 px to the next view (UIView). Later in my code
...
Getting rid of \n when using .readlines() [duplicate]
...
The url proposed from @bfrederix is broken. Here an archive.org copy web.archive.org/web/20160215030807/http://axialcorps.com/2013/…
– Paolo Melchiorre
Oct 24 '18 at 9:45
...