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What is polymorphism, what is it for, and how is it used?
...ns to be made from carbon and hydrogen, C8H8, and polystyrene is made from groups of that, (C8H8)n.
Perhaps I should have stated that a polyp was many occurrences of the letter p although, now that I've had to explain the joke, even that doesn't seem funny either.
Sometimes, you should just quit w...
Difference between Role and GrantedAuthority in Spring Security
...ch user like admin, guest_user, normal_user. The profiles are just logical grouping of permissions, independent of spring-security.
When a new user is added, a profile is assigned to it (having all permissible permissions). Now when ever user try to perform some action, permission/role for that acti...
What are rvalues, lvalues, xvalues, glvalues, and prvalues?
...ue that are compatible with C++98. We just divided the rvalues into two subgroups, xvalues and prvalues, and we refer to lvalues and xvalues as glvalues. Xvalues are a new kind of value category for unnamed rvalue references. Every expression is one of these three: lvalue, xvalue, prvalue. A Venn di...
How to design a multi-user ajax web application to be concurrently safe
... Mutexes have to remain globaly unique though.
Depending on load scenarios group your frontend- and backend-servers by artifact-id ranges. This will allow for better usage of persistent memory (no database has all the data) and makes it possible to scale the mutexing. Your javascript has to maintain...
Performance optimization strategies of last resort [closed]
...07) Harrison, Amento, Kuznetsov and Bell tests multiple types of bars on a group of users as well as discussing some ways to rearrange the operations so that the progress may be perceived as faster.
– Emil Vikström
Jun 26 '12 at 11:38
...
OO Design in Rails: Where to put stuff
...y popular answer is to just use modules (usually stashed in lib) that hold groups of methods, and then include the modules into the appropriate classes. This helps in cases where you have categories of functionality that you wish to reuse in multiple classes, but where the functionality is still not...
When do we have to use copy constructors?
...as to deal with explicitly declaring/defining the copy constructor. I have grouped the cases into two categories
Correctness/Semantics - if you don't provide a user-defined copy-constructor, programs using that type may fail to compile, or may work incorrectly.
Optimization - providing a good alte...
How to prevent a dialog from closing when a button is clicked
...e positive button.
If you custom dialog has radio buttons, then use RadioGroup.OnCheckedChangeListener.
If your custom dialog has check boxes, then use CompoundButton.OnCheckedChangeListener.
If your custom dialog has an EditText, then use TextWatcher.
The positive button can be disabled like th...
Is it safe to use Project Lombok? [closed]
...nerating javadoc is technically possible. Please participate in the google group if you've any bright ideas how to implement it. I mean, just generating a standard text is not that useful. Like getFoo, returns foo, setFoo sets the foo? How is that going to help?
– Roel Spilker
...
Mixing Angular and ASP.NET MVC/Web api?
...er great thing about an SPA is it can increase bandwidth of your team. One group can blast out the services while the other lays in the client app. Since you can easily stub or mock REST services, you could have a fully working client app on mock services and swap out for the real ones when they're ...