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Django queries - id vs pk
...mes faster. From the other hand, if you want universal access to (probably custom) primary key fields, then use pk everywhere. A third of a microsecond is nothing for web.
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Import Maven dependencies in IntelliJ IDEA
...endencies can be fetched.
Of course all the required dependencies and any custom repositories must be defined directly in the pom.xml file.
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Java 8 stream reverse order
...ible to write a much more efficient reversing collector using some kind of customized data structure.
UPDATE 2016-01-29
Since this question has gotten a bit of attention recently, I figure I should update my answer to solve the problem with inserting at the front of ArrayList. This will be horribl...
Why would a static nested interface be used in Java?
...one class.So to summarize, an inner interface enables the construction of custom types and improves their encapsulation.
class ConcreteA implements A {
:
}
class ConcreteB implements B {
:
}
class ConcreteC implements C {
:
}
class Zoo implements A, C {
:
}
class DoSomethingAlready {
int...
In C# what is the difference between ToUpper() and ToUpperInvariant()?
... What characters will you accept as a username? What if you have to put in Customer names into a Legacy ERP built on COBOL? Lots of cases where the culture is important. Not to mention, dates and numbers. 4.54 is written 4,54 in some languages. Pretending those other languages don't exist won't get ...
Internal typedefs in C++ - good style or bad style?
...he side of the user. As a user of allocator_traits attempting to create a custom allocator, I don't have to bother with the fifteen members of the traits class... all I have to do is say typedef Blah value_type; and provide the appropriate member functions, and the default allocator_traits will fig...
Spring Boot - inject map from application.yml
...spring-boot/issues/1301) to perform placeholder replacement when you use a custom location
– Andy Wilkinson
Jul 28 '14 at 15:09
...
100% Min Height CSS layout
...
To set a custom height locked to somewhere:
body, html {
height: 100%;
}
#outerbox {
width: 100%;
position: absolute; /* to place it somewhere on the screen */
top: 130px; /* free space at top */
bottom:...
When to use Amazon Cloudfront or S3
...e for using CloudFront over S3 is that you can use an SSL certificate to a custom domain in CloudFront whereas you cannot in S3. A pretty good reason imho!
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Convert SQLITE SQL dump file to POSTGRESQL
...oesn't recognize unsigned columns, so you might want to drop that or add a custom-made constraint such as this:
CREATE TABLE tablename (
...
unsigned_column_name integer CHECK (unsigned_column_name > 0)
);
While SQLite defaults null values to '', PostgreSQL requires them to be set as NUL...