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How do I check if file exists in jQuery or pure JavaScript?
...l, false);
http.send();
return http.status!=404;
}
Small changes and it could check for status HTTP status code 200 (success), instead.
EDIT 2: Since sync XMLHttpRequest is deprecated, you can add a utility method like this to do it async:
function executeIfFileExist(src, callback) {
...
Programmatically get the version number of a DLL
...ble (you can't unload it without killing the domain), requires permissions and is liable to cause side effects, such as executing beforefieldinit type initializers, and is just not required in this case. Are these reasons sound enough?
– staafl
Oct 10 '13 at 15...
javascript node.js next()
...samples here:
http://blog.mixu.net/2011/02/02/essential-node-js-patterns-and-snippets/
Let's look at the example you posted:
function loadUser(req, res, next) {
if (req.session.user_id) {
User.findById(req.session.user_id, function(user) {
if (user) {
req.currentUser = user;...
Converting A String To Hexadecimal In Java
...
Love it! No loops and no bit-flipping. I want to give you 0xFF upvotes :)
– laher
Oct 22 '11 at 23:11
5
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What does “xmlns” in XML mean?
...
It defines an XML Namespace.
In your example, the Namespace Prefix is "android" and the Namespace URI is "http://schemas.android.com/apk/res/android"
In the document, you see elements like: <android:foo />
Think of the namespace prefix as a variable with a short name alias for the full n...
Why use 'virtual' for class properties in Entity Framework model definitions?
... around the virtual property so that the property can support lazy loading and more efficient change tracking. See What effect(s) can the virtual keyword have in Entity Framework 4.1 POCO Code First? for a more thorough discussion.
Edit to clarify "create a proxy around":
By "create a proxy around"...
BestPractice - Transform first character of a string into lower case
...ing(1)
The first solution is not optimized because string.Format is slow and you don't need it if you have a format that will never change. It also generates an extra string to covert the letter to lowercase, which is not needed.
The approach with "+ 32" is ugly / not maintainable as it requires ...
Android: how to make an activity return results to the activity which calls it?
...ation activity that can be called from many activities, such as Sign up and Order . In the Location activity the user enters his location, so the activity Location will return this new location to that activity which called it.
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“unmappable character for encoding” warning in Java
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Absolutely. (This is better handled in C#, where unicode escaping is only applied in certain contexts - but then there's the dangerous \x escape sequence as well, which is awful.)
– Jon Skeet
Jan 21 '09 at 11:38
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Set the absolute position of a view
Is it possible to set the absolute position of a view in Android? (I know that there is an AbsoluteLayout , but it's deprecated...)
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