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No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin '…' is therefor
...der Instead of using setHeader method,
response.addHeader("Access-Control-Allow-Origin", "*");
* in above line will allow access to all domains.
For allowing access to specific domain only:
response.addHeader("Access-Control-Allow-Origin", "http://www.example.com");
Check this blog post.
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self referential struct definition?
...
It would make sense. Python allows it and even allows serialization of such an object. Why not C++?
– noɥʇʎԀʎzɐɹƆ
Jun 6 '16 at 1:06
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Sleep in JavaScript - delay between actions
...b;
setTimeout(function() {
b = a + 4;
}, (3 * 1000));
This doesn't really 'sleep' JavaScript—it just executes the function passed to setTimeout after a certain duration (specified in milliseconds). Although it is possible to write a sleep function for JavaScript, it's best to use setTimeout ...
What is choice_set in this Django app tutorial?
...jango's ORM follows the relationship backwards from Question too, automatically generating a field on each instance called foo_set where Foo is the model with a ForeignKey field to that model.
choice_set is a RelatedManager which can create querysets of Choice objects which relate to the Question i...
Authentication versus Authorization
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Authentication is the process of ascertaining that somebody really is who they claim to be.
Authorization refers to rules that determine who is allowed to do what. E.g. Adam may be authorized to create and delete databases,
while Usama is only authorised to read.
The two concep...
How to make JavaScript execute after page load?
...ages, and subframes to finish loading. At this stage you could programmatically optimize loading of images and css based on user device or bandwidth speed.
Executes after DOM is loaded (before img and css):
document.addEventListener("DOMContentLoaded", function(){
//....
});
Note: Synchr...
Enum type constraints in C# [duplicate]
What is the reason behind C# not allowing type constraints on Enum 's? I'm sure there is a method behind the madness, but I'd like to understand why it's not possible.
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Making a mocked method return an argument that was passed to it
...entAt(0, Bar.class)). And you can just as well use a method reference and call real method.
– Paweł Dyda
Jan 29 '15 at 13:17
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Drop shadow for PNG image in CSS
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A little late to the party, but yes, it is totally possible to create "true" dynamic drop shadows around alpha masked PNGs, using a combination of dropshadow-filter (for Webkit), SVG (for Firefox) and DX filters for IE.
.shadowed {
-webkit-filter: drop-shadow(12px 1...
How to add a button to a PreferenceScreen?
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actually this does not display a button at all, which will confuse the user and isn't what the OP asked. correct answer to actually show a button is Nicolas's.
– mutable2112
May 5 '15 at 18:...