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Differences between cookies and sessions?
...in web developement and am learning about JSP & Servlets . I have some knowledge of HttpSession - I have used it in some of my sample projects.
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sql query to return differences between two tables
...JOIN B ON (A.C = B.C)
WHERE A.C IS NULL OR B.C IS NULL
What you need to know in this case is, that when a record can be found in A, but not in B, than the columns which come from B will be NULL, and similarly for those, which are present in B and not in A, the columns from A will be null.
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Validation of radio button group using jQuery validation plugin
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This is now the best answer for me with the updates to jQuery. +1.
– Kieran Andrews
Feb 21 '11 at 1:46
6
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Difference between FetchType LAZY and EAGER in Java Persistence API?
...s;
private List<Student> students;
// setters and getters
}
Now when you load a University from the database, JPA loads its id, name, and address fields for you. But you have two options for how students should be loaded:
To load it together with the rest of the fields (i.e. eagerl...
Reconnection of Client when server reboots in WebSocket
... ws.onclose = function(){
console.log('closed!');
//reconnect now
check();
};
}
function check(){
if(!ws || ws.readyState == 3) start();
}
start();
setInterval(check, 5000);
});
This will retry as soon as the server closes the connection, and it will chec...
Dilemma: when to use Fragments vs Activities:
I know that Activities are designed to represent a single screen of my application, while Fragments are designed to be reusable UI layouts with logic embedded inside of them.
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jQuery Set Select Index
...value=C]').prop('selected', true);
The selected item would be "Number 2" now.
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How to find out how many lines of code there are in an Xcode project?
...t. It also provides other interesting statistics so is worth a run for fun now and then.
Note that it will not look inside real folders, though it will look in groups. Odds are you aren't using real folders so it'll work great. If you are using folders then you just have to do the count in each fol...
Binary Data in MySQL [closed]
...nsiderations other than performance. For example I'm working on something now where performance doesn't matter at all. Other factors such as centralisation, simplicity and backups mean that in this case storing in the database makes sense. Another common reason is replication.
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jQuery SVG vs. Raphael [closed]
... and I'm trying to decide between Raphael and jQuery SVG . I'd like to know
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