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Performing user authentication in Java EE / JSF using j_security_check
...store in my SessionInformation EJB.
Logout:
I also looked around for the best way to logout. The best one that I've found is using a Servlet:
@WebServlet(name = "LogoutServlet", urlPatterns = {"/logout"})
public class LogoutServlet extends HttpServlet {
@Override
protected void service(Http...
在 App Inventor 2 中使用图像 · App Inventor 2 中文网
...t MIT App Inventor Programmers Should Do
Synopsis: App Inventor works best if you use images whose size matches the size you want them to appear on your screen. If you import larger images into your app, your app may run out of system memory.
1. Out of memory errors
People building apps in App...
How to clear an ImageView in Android?
...iew (you can check the ImageView code if you like, i didn't).
I think the best solution is:
viewToUse.setImageResource(android.R.color.transparent);
I like this solution the most cause there isn't anything tricky in reverting the state and it's also clear what it is doing.
...
Where in memory are my variables stored in C?
...guage, all that matters is extent, scope, linkage, and access; exactly how items are mapped to different memory segments is up to the individual implementation, and that will vary. The language standard doesn't talk about memory segments at all. Most modern architectures act mostly the same way; b...
Flexbox and Internet Explorer 11 (display:flex in ?)
...: flex;
-ms-flex-direction: row;
flex-direction: row;
align-items: stretch;
min-height: 100vh;
}
.main::after {
content: '';
height: 100vh;
width: 0;
overflow: hidden;
visibility: hidden;
float: left;
}
.left {
width: 200px;
background: #F0F0F0...
How to format numbers by prepending 0 to single-digit numbers?
...
The best method I've found is something like the following:
(Note that this simple version only works for positive integers)
var myNumber = 7;
var formattedNumber = ("0" + myNumber).slice(-2);
console.log(formattedNumber)...
Linq to SQL how to do “where [column] in (list of values)”
...
Use
where list.Contains(item.Property)
Or in your case:
var foo = from codeData in channel.AsQueryable<CodeData>()
where codeIDs.Contains(codeData.CodeId)
select codeData;
But you might as well do that in dot notation:...
How exactly does the python any() function work?
...you use any(lst) you see that lst is the iterable, which is a list of some items. If it contained [0, False, '', 0.0, [], {}, None] (which all have boolean values of False) then any(lst) would be False. If lst also contained any of the following [-1, True, "X", 0.00001] (all of which evaluate to Tru...
How to correctly save instance state of Fragments in back stack?
...
This is the best solution I've found so far but there is still one (somewhat exotic) problem remaining: if you have two fragments, A and B, where A is currently on the backstack and B is visible, then you lose the state of A (the invisib...
python assert with and without parenthesis
...t (1==2) which is identical to assert 1==2, because parens around a single item don't create a tuple unless there's a trailing comma e.g. (1==2,).
assert(1==2, "hi") is parsed as assert (1==2, "hi"), which doesn't give an error because a non-empty tuple (False, "hi") isn't a false value, and there ...