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Proper way to handle multiple forms on one page in Django
I have a template page expecting two forms. If I just use one form, things are fine as in this typical example:
10 Answers...
How to find the kth smallest element in the union of two sorted arrays?
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As @JohnKurlak mentioned it doesn't work for values where whole a is smaller than b see repl.it/HMYf/0
– Jeremy S.
Apr 17 '17 at 16:29
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How to make a Java class that implements one interface with two generic types?
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Here's a possible solution based on Steve McLeod's one:
public class TwoTypesConsumer {
public void consumeTomato(Tomato t) {...}
public void consumeApple(Apple a) {...}
public Consumer<Tomato> getTomatoConsumer() {
return new Consumer<Tomato>...
What are the mathematical/computational principles behind this game?
...tly different than the Euclidean geometry:
Every two points have exactly one line that passes through them (this is the same).
Every two lines meet in exactly one point (this is a bit different from Euclid).
Now, add "finite" into the soup and you have the question:
Can we have a geometry with ...
What's the difference between @JoinColumn and mappedBy when using a JPA @OneToMany association
...ect annotations would look like this:
@Entity
public class Company {
@OneToMany(fetch = FetchType.LAZY, mappedBy = "company")
private List<Branch> branches;
}
@Entity
public class Branch {
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "companyId")
private Company ...
Java concurrency: Countdown latch vs Cyclic barrier
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One major difference is that CyclicBarrier takes an (optional) Runnable task which is run once the common barrier condition is met.
It also allows you to get the number of clients waiting at the barrier and the number requ...
Import multiple csv files into pandas and concatenate into one DataFrame
...d several csv files from a directory into pandas and concatenate them into one big DataFrame. I have not been able to figure it out though. Here is what I have so far:
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“[notice] child pid XXXX exit signal Segmentation fault (11)” in apache error.log [closed]
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Attach gdb to one of the httpd child processes and reload or continue working and wait for a crash and then look at the backtrace. Do something like this:
$ ps -ef|grep httpd
0 681 1 0 10:38pm ?? 0:00.45 /Applications/MA...
What is so bad about singletons? [closed]
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Singletons solve one (and only one) problem.
Resource Contention.
If you have some resource that
(1) can only have a single instance, and
(2) you need to manage that single instance,
you need a singleton.
There aren't many examples. ...
lexers vs parsers
...l 3, not level 2), but that doesn't matter for the output data and for the one which reads them.
Parsers produce syntax trees, which are representations of sentences of the context-free language they recognize. Usually it's only one big tree for the whole document/source file, because the whole docu...