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Accessing Session Using ASP.NET Web API
...sion State
Access to ASP.NET session state
is exclusive per session, which means that if two different users make
concurrent requests, access to each separate session is granted
concurrently. However, if two concurrent requests are made for the
same session (by using the same SessionID value), the f...
How to select rows with no matching entry in another table?
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@MotiKorets you mean increased the speed :)
– Ondrej Bozek
Apr 23 '19 at 14:01
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ObservableCollection not noticing when Item in it changes (even with INotifyPropertyChanged)
...sn't this all depend on your understanding of the term changed? This could mean that a property of one of the elements in the collection has changed (which is how I think you are interpreting it) or it could mean that one of the elements of the collection has been changed by replacing it with a diff...
Difference between Key, Primary Key, Unique Key and Index in MySQL
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KEY and INDEX are synonyms in MySQL. They mean the same thing. In databases you would use indexes to improve the speed of data retrieval. An index is typically created on columns used in JOIN, WHERE, and ORDER BY clauses.
Imagine you have a table called users and y...
How do you effectively model inheritance in a database?
...re is a single table which represents all the inheritance hierarchy, which means several of the columns will probably be sparse. A discriminator column is added which tells the system what type of row this is.
Given the classes above, you end up with this table:
table Person
------------
int id (P...
Why is using onClick() in HTML a bad practice?
... still working without JS, or if the user middle clicks the link.
It also means that I could handle generic popups by rewriting again to:
HTML:
<a class="popup" href="/map/">link</a>
JS:
$(document).ready(function() {
$(".popup").click(function(){
popup($(this).attr("h...
How to add a primary key to a MySQL table?
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I would definitely put FIRST after AUTO_INCREMENT, which means, that the id will be first column of the already existing table. Otherwise it will be put at the end of the table as it is written now, which can be a little confusing when doing simple SELECT * ...
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remove objects from array by object property
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what do you mean by callback as well, you can use the above code to remove the object from array..
– Rahul R.
Jun 9 '14 at 10:09
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How to select html nodes by ID with jquery when the id contains a dot?
...t be unique throughout the document. What would "#id.class" be good for? I mean, you can't be any more specific than "#id", can you?
– Tomalak
Mar 3 '09 at 10:19
2
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What is the difference between Serializable and Externalizable in Java?
... readExternal and writeExternal methods on your class). This gives you the means to get around the reflection performance bottleneck.
In recent versions of Java (1.3 onwards, certainly) the performance of reflection is vastly better than it used to be, and so this is much less of a problem. I susp...