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Suppress warning “Category is implementing a method which will also be implemented by its primary cl
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A category allows you to add new methods to an existing class. If you want to reimplement a method that already exists in the class, you typically create a subclass instead of a category.
Apple documentation: Customizing existing classes
If the name of a method declar...
Ways to save enums in database
...nd it is much more worth it to help when you're having a problem.
Additionally, if you use numerical values, you are tied to them. You cannot nicely insert or rearrange the members without having to force the old numerical values. For example, changing the Suit enumeration to:
public enum Suit { U...
How do I give text or an image a transparent background using CSS?
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The first hex number defines the alpha value of the color.
Full solution all browsers:
.alpha60 {
/* Fallback for web browsers that doesn't support RGBa */
background: rgb(0, 0, 0) transparent;
/* RGBa with 0.6 opacity */
background: rgba(0, 0, 0, 0.6);
/* For IE 5.5 - 7*/
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The Definitive C++ Book Guide and List
...tour” is a quick (about 180 pages and 14 chapters) tutorial overview of all of standard C++ (language and standard library, and using C++11) at a moderately high level for people who already know C++ or at least are experienced programmers. This book is an extended version of the material that con...
Multi-gradient shapes
...intDrawable();
p.setShape(new RectShape());
p.setShaderFactory(sf);
Basically, the int array allows you to select multiple color stops, and the following float array defines where those stops are positioned (from 0 to 1). You can then, as stated, just use this as a standard Drawable.
Edit: Here's...
RuntimeWarning: invalid value encountered in divide
... would one want to ignore a divide by zero or NaN?
– x squared
Nov 10 '17 at 14:38
7
@xsquared Wh...
Efficient way to insert a number into a sorted array of numbers?
... setup, the native method doesn't make up for it. This is true even for small data sets, inserting 100 elements into an array of 1000:
First Method:
1 milliseconds
Second Method:
34 milliseconds
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Best Practice: Access form elements by HTML id or name attribute?
...submits it via AJAX (and you don't care about doing a regular submit as a fallback in case AJAX fails somehow), ...then you've made a mistake.
– Doin
Aug 18 '16 at 18:32
1
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C++ valarray vs. vector
I like vectors a lot. They're nifty and fast. But I know this thing called a valarray exists. Why would I use a valarray instead of a vector? I know valarrays have some syntactic sugar, but other than that, when are they useful?
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How do I change the UUID of a virtual disk?
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I really wish VirtualBox will have some UI or a window that allow us to change this
– fedmich
Feb 11 '15 at 15:49
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