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Why are quaternions used for rotations?
...using quaternions for rotations instead of writing things in matrix/vector form.
8 Answers
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ASP.NET Web API Authentication
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allow a user to log in to the API
You need to send a valid Forms Authentication cookie along with the request. This cookie is usually sent by the server when authenticating (LogOn action) by calling the [FormsAuthentication.SetAuthCookie method (see MSDN).
So the client needs to per...
Spring MVC - How to get all request params in a map in Spring controller?
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Get parameter map will also contain form data from a POST request. If the user does not know the keys in the query string, then how will they be able to distinguish between what came from the query string and what is from data from a POST body?
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HTTP POST using JSON in Java
...st
Create an HttpPost request with it and add the header application/x-www-form-urlencoded
Create a StringEntity that you will pass JSON to it
Execute the call
The code roughly looks like (you will still need to debug it and make it work):
// @Deprecated HttpClient httpClient = new DefaultHttpClien...
Is there any way to prevent input type=“number” getting negative values?
...t; 58)
|| e.keyCode == 8)) {
return false;
}
}
<form action="" method="post">
<input type="number" id="number" min="0" />
<input type="submit" value="Click me!"/>
</form>
Clarification provided by @Hugh Guiney:
What key codes are being c...
Ternary operator in AngularJS templates
...nd later, see the currently accepted answer.
Before Angular 1.1.5:
The form of a ternary in angularjs is:
((condition) && (answer if true) || (answer if false))
An example would be:
<ul class="nav">
<li>
<a href="#/page1" style="{{$location.path()=='/page...
Is there a float input type in HTML5?
...playground showing how various steps affect various input types:
<form>
<input type=number step=1 /> Step 1 (default)<br />
<input type=number step=0.01 /> Step 0.01<br />
<input type=number step=any /> Step any<br />
<input type=range s...
iOS 5 fixed positioning and virtual keyboard
...ks fine in iOS 5 (I'm testing on an iPod Touch) until I'm on a page with a form. When I tap into an input field and the virtual keyboard appears, suddenly the fixed position of my div is lost. The div now scrolls with the page as long as the keyboard is visible. Once I click Done to close the keyboa...
Java List.add() UnsupportedOperationException
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Form the Inheritance concept, If some perticular method is not available in the current class it will search for that method in super classes. If available it executes.
It executes AbstractList<E> class add() method...
Difference between encoding and encryption
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Encoding transforms data into another format using a scheme that is publicly available so that it can easily be reversed.
Encryption transforms data into another format in such a way that only specific individual(s) can reverse the transf...