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Arrays vs Vectors: Introductory Similarities and Differences [closed]
... An example of the differences might be included libraries, symbolism, abilities, etc.
3 Answers
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PHP and Enumerations
... creating a simple enum class that extends BasicEnum, you now have the ability to use methods thusly for simple input validation:
abstract class DaysOfWeek extends BasicEnum {
const Sunday = 0;
const Monday = 1;
const Tuesday = 2;
const Wednesday = 3;
const Thursday = 4;
con...
Can I change the fill color of an svg path with CSS?
...o match the element, just as when styling HTML. If you just want to apply it to all SVG paths, you could use, for example:
path {
fill: blue;
}
External CSS appears to override the path's fill attribute, at least in WebKit and Gecko-based browsers I tested. Of course, if you write, sa...
Show percent % instead of counts in charts of categorical variables
...(labels = percent) ## version 3.0.0
This question is currently the #1 hit on google for 'ggplot count vs percentage histogram' so hopefully this helps distill all the information currently housed in comments on the accepted answer.
Remark: If hp is not set as a factor, ggplot returns:
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Running code in main thread from another thread
...
NOTE: This answer has gotten so much attention, that I need to update it. Since the original answer was posted, the comment from @dzeikei has gotten almost as much attention as the original answer. So here are 2 possible solutions:
1. If your background thread has a reference to a Context obje...
How to use hex color values
...andard ones that UIColor allows you to use, but I have no idea how to do it.
38 Answers
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How can I use Spring Security without sessions?
I am building a web application with Spring Security that will live on Amazon EC2 and use Amazon's Elastic Load Balancers. Unfortunately, ELB does not support sticky sessions, so I need to ensure my application works properly without sessions.
...
Backwards migration with Django South
... one you want to roll back.
Your app should have a migrations directory, with files in it named like
0000_initial.py
0001_added_some_fields.py
0002_added_some_more_fields.py
0003_deleted_some_stuff.py
Normally, when you run ./manage.py migrate your_app, South runs all new migrations, in order. (...
The smallest difference between 2 Angles
...360 - 180
Beware in many languages the modulo operation returns a value with the same sign as the dividend (like C, C++, C#, JavaScript, full list here). This requires a custom mod function like so:
mod = (a, n) -> a - floor(a/n) * n
Or so:
mod = (a, n) -> (a % n + n) % n
If angles are...
Cast List to List
...
You can't cast it (preserving reference identity) - that would be unsafe. For example:
public interface IFruit {}
public class Apple : IFruit {}
public class Banana : IFruit {}
...
List<Apple> apples = new List<Apple>();
Lis...