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Why is address zero used for the null pointer?
...o need not yield a null pointer".
a negative value might be just as usable by the platform as an address - the C standard simply had to chose something to use to indicate a null pointer, and zero was chosen. I'm honestly not sure if other sentinel values were considered.
The only requirements for...
Why do some functions have underscores “__” before and after the function name?
... whose name starts with an underscore.
single_trailing_underscore_: used by convention to avoid conflicts with Python keyword, e.g.
Tkinter.Toplevel(master, class_='ClassName')
__double_leading_underscore: when naming a class attribute, invokes name mangling (inside class FooBar, __boo beco...
Does order of where clauses matter in SQL?
...e:WHERE T1.col_1/T2.col_2 > 10 AND T2.col_2 <> 0 and got a DIVIDE BY 0 error. After I switched the order the conditions the query executed succesfully. Then I switched the order back so I would expect to get the error again, but this time it worked!In the end my conclusion was that for the ...
REST API Authentication
...
Please read this question and the answer provided by Les Hazelwood (author of Apache Shiro).
– justin.hughey
Nov 3 '14 at 15:11
1
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What is PAGEIOLATCH_SH wait type in SQL Server?
...this:
Select * from <table> where <col1> = <value> order by <PrimaryKey>
, check that you have a composite index on (col1, col_primary_key).
If you don't have one, then you'll need either a full INDEX SCAN if the PRIMARY KEY is chosen, or a SORT if an index on col1 is chosen...
Two forward slashes in a url/src/href attribute [duplicate]
...in your example — could be loaded from either a http or a https context. By using protocol relative URLs, you can avoid implementing
if (window.location.protocol === 'http:') {
myResourceUrl = 'http://example.com/my-resource.js';
} else {
myResourceUrl = 'https://example.com/my-resource.js...
What is the difference between Nexus and Maven?
...w Maven uses repositories:
Maven leverages the concept of a repository by retrieving the artifacts necessary to build an application and deploying the result of the build process into a repository. Maven uses the concept of structured repositories so components can be retrieved to support the bu...
Reading a List from properties file and load with spring annotation @Value
...Exception exception and not javax.el.ELException. Is your objected created by Spring?
– Wilhelm Kleu
Oct 25 '12 at 8:05
1
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Implements vs extends: When to use? What's the difference?
...Also java doesn't support multiple inheritance for classes. This is solved by using multiple interfaces.
public interface ExampleInterface {
public void doAction();
public String doThis(int number);
}
public class sub implements ExampleInterface {
public void doAction() {
//s...
Best practice multi language website
... title. Purely for SEO purposes.
Can it be done in Laravel?
Kinda, but not by default.
I am not too familiar with it, but from what I have seen, Laravel uses simple pattern-based routing mechanism. To implement multilingual URLs you will probably have to extend core class(es), because multilingual r...