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How are everyday machines programmed?
...h computers and mobile devices as appliances, digital watches, etc) programmed? What kind of code goes into the programming of a Coca-Cola vending machine? How does my coffee maker accept a pre-programmed time and begin brewing a pot of coffee hours later, when that time arrives?
...
Maintaining the final state at end of a CSS3 animation
I'm running an animation on some elements that are set to opacity: 0; in the CSS. The animation class is applied onClick, and, using keyframes, it changes the opacity from 0 to 1 (among other things).
...
What is the difference between the bridge pattern and the strategy pattern?
...m wikipedia:
The UML class diagram for the Strategy
pattern is the same as the diagram for
the Bridge pattern. However, these two
design patterns aren't the same in
their intent. While the Strategy
pattern is meant for behavior, the
Bridge pattern is meant for structure.
The cou...
Differences between Exception and Error
...o learn more about basic Java and the different types of Throwables, can someone let me know the differences between Exceptions and Errors?
...
Fastest way to replace NAs in a large data.table
... na.replace = function(v,value=0) { v[is.na(v)] = value; v }
for (i in names(dt))
eval(parse(text=paste("dt[,",i,":=na.replace(",i,")]")))
}
system.time(a_gdata = f_gdata(dt1))
user system elapsed
18.805 12.301 134.985
system.time(a_andrie = f_andrie(dt1))
Error: cannot allocate vec...
Detect Click into Iframe using JavaScript
...tand that it is not possible to tell what the user is doing inside an iframe if it is cross domain. What I would like to do is track if the user clicked at all in the iframe . I imagine a scenario where there is an invisible div on top of the iframe and the the div will just then pass the...
Write a program to find 100 largest numbers out of an array of 1 billion numbers
...e new number to the queue.
EDIT:
as Dev noted, with a priority queue implemented with a heap, the complexity of insertion to queue is O(logN)
In the worst case you get billionlog2(100) which is better than billionlog2(billion)
In general, if you need the largest K numbers from a set of N numbers,...
How unique is UUID?
How safe is it to use UUID to uniquely identify something (I'm using it for files uploaded to the server)? As I understand it, it is based off random numbers. However, it seems to me that given enough time, it would eventually repeat it self, just by pure chance. Is there a better system or a patter...
How to add custom method to Spring Data JPA
...
You need to create a separate interface for your custom methods:
public interface AccountRepository
extends JpaRepository<Account, Long>, AccountRepositoryCustom { ... }
public interface AccountRepositoryCustom {
public void customMethod();
}
and provide an impl...
Custom domain for GitHub project pages
...es section. You have two options:
Choosing master branch will treat /README.md as your web index.html. Choosing master branch /docs folder will treat /docs/README.md as your web index.html.
Choose a theme.
Wait a minute while GitHub publishes your site. Verify it works by clicking on the link ne...