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In which case do you use the JPA @JoinTable annotation?
...ble or @JoinColumn
Let's pretend that you have an entity named Project and another entity named Task and each project can have many tasks.
You can design the database schema for this scenario in two ways.
The first solution is to create a table named Project and another table named Task and ad...
How to remove items from a list while iterating?
I'm iterating over a list of tuples in Python, and am attempting to remove them if they meet certain criteria.
26 Answers
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How do you find out the caller function in JavaScript?
... alert("caller is " + Hello.caller);
}
Note that this feature is non-standard, from Function.caller:
Non-standard
This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompa...
Add primary key to existing table
...
drop constraint and recreate it
alter table Persion drop CONSTRAINT <constraint_name>
alter table Persion add primary key (persionId,Pname,PMID)
edit:
you can find the constraint name by using the query below:
select OBJECT_NAME(...
Do I need to convert .CER to .CRT for Apache SSL certificates? If so, how?
...
File extensions for cryptographic certificates aren't really as standardized as you'd expect. Windows by default treats double-clicking a .crt file as a request to import the certificate into the Windows Root Certificate store, but treats a .cer file as a request just to view the certificat...
Why are Python lambdas useful? [closed]
...se elements of the original list that are multiples of 3. This is shorter (and, one could argue, clearer) than
def filterfunc(x):
return x % 3 == 0
mult3 = filter(filterfunc, [1, 2, 3, 4, 5, 6, 7, 8, 9])
Of course, in this particular case, you could do the same thing as a list comprehension:
...
What is object slicing?
...blic A {
int bar;
};
So an object of type B has two data members, foo and bar.
Then if you were to write this:
B b;
A a = b;
Then the information in b about member bar is lost in a.
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Simple conversion between java.util.Date and XMLGregorianCalendar
I'm looking for a simple method of converting between java.util.Date and javax.xml.datatype.XMLGregorianCalendar in both directions.
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Fade In Fade Out Android Animation in Java
... to have a 2 second animation of an ImageView that spends 1000ms fading in and then 1000ms fading out.
11 Answers
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Configure Flask dev server to be visible across the network
... To set to a specific ip app.run(host="192.168.1.7",port=5010) handy if your pc has a few ip's
– lxx
Jan 2 '15 at 3:29
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