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What are C++ functors and their uses?
...d our functor instance. I could create another adder, which added 27, just by calling the constructor with a different value. This makes them nicely customizable.
As the last lines show, you often pass functors as arguments to other functions such as std::transform or the other standard library alg...
JavaScript ternary operator example with functions
... meaning
if(expression) //longer blocks but organized and can be grasped by humans
{
//35 lines of code here
}
else if (something_else)
{
//40 more lines here
}
else if (another_one) /etc, etc
{
...
Less good:
this > that ? testFucntion() ? thirdFunction() ? imlost() : whathappu...
Is there a Java standard “both null or equal” static method?
...
if by some chance you are have access to the Jakarta Commons library there is ObjectUtils.equals() and lots of other useful functions.
EDIT: misread the question initially
...
How to set auto increment primary key in PostgreSQL?
...now!
(3 rows)
The two rows have keys that start at 1 and are incremented by 1, as defined by the sequence.
Bonus Elite ProTip:
Programmers hate typing, and typing out the nextval('splog_adfarm_seq') is annoying. You can type DEFAULT for that parameter instead, like this:
insert into splog_adfa...
LINQ to Entities only supports casting EDM primitive or enumeration types with IEntity interface
...
I was able to resolve this by adding the class generic type constraint to the extension method. I'm not sure why it works, though.
public static T GetById<T>(this IQueryable<T> collection, Guid id)
where T : class, IEntity
{
//...
...
Prevent jQuery UI dialog from setting focus to first textbox
... a hidden span above it, use ui-helper-hidden-accessible to make it hidden by absolute positioning. I know you have that class because you are using dialog from jquery-ui and it's in jquery-ui.
<span class="ui-helper-hidden-accessible"><input type="text"/></span>
...
When should one use final for method parameters and local variables?
...bsess over:
Final fields - Marking fields as final forces them to be set by end of construction, making that field reference immutable. This allows safe publication of fields and can avoid the need for synchronization on later reads. (Note that for an object reference, only the field reference i...
Java SE 6 vs. JRE 1.6 vs. JDK 1.6 - What do these mean?
...Update 10).
Edited 2011-04-06:
The world turns, and Java is now managed by Oracle, which bought Sun. Later this year, the sun.com domain is supposed to go dark. The new page (based on a redirect) is this Java page at the Oracle Tech Network. (See also java.com.)
Edited 2013-01-11: And the w...
Including Google Web Fonts link or import?
...
Use the <link> provided by Google because there is versioning on the font, but right above it use HTML5's preconnect feature to ask the browsers to open a TCP connection and negotiate SSL in advance with fonts.gstatic.com. Here's an example, which o...
RegEx - Match Numbers of Variable Length
...
You can specify how many times you want the previous item to match by using {min,max}.
{[0-9]{1,3}:[0-9]{1,3}}
Also, you can use \d for digits instead of [0-9] for most regex flavors:
{\d{1,3}:\d{1,3}}
You may also want to consider escaping the outer { and }, just to make it clear that...