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Draw line in UIView
...orWithColor(context, [UIColor redColor].CGColor);
// Draw them with a 2.0 stroke width so they are a bit more visible.
CGContextSetLineWidth(context, 2.0f);
CGContextMoveToPoint(context, 0.0f, 0.0f); //start at this point
CGContextAddLineToPoint(context, 20.0f, 20.0f); //draw to t...
Convert between UIImage and Base64 string
...Data format
let imageData:NSData = NSData.init(contentsOfURL: url)!
Swift 2.0 > Encoding
let strBase64:String = imageData.base64EncodedStringWithOptions(.Encoding64CharacterLineLength)
Swift 2.0 > Decoding
let dataDecoded:NSData = NSData(base64EncodedString: strBase64, options: NSDataBase64D...
JPA: How to have one-to-many relation of the same Entity type
...ip is the same. The general case is detailed in Section 2.10.2 of the JPA 2.0 spec.
Here's a worked example. First, the entity class A:
@Entity
public class A implements Serializable {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private Long id;
@ManyToOne
private A pa...
How do you test to see if a double is equal to NaN?
...------------------------------------------";
Double numerator = -2.0;
Double denominator = -2.0;
while (denominator <= 1) {
Double x = numerator/denominator;
Double y = new Double (x);
boolean z = y.isNaN();
System.out.println("y ...
Wait for page load in Selenium
How do you make Selenium 2.0 wait for the page to load?
47 Answers
47
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Split a string by another string in C#
...
As of .NET Core 2.0, there is an override that takes a string.
So now you can do "THExxQUICKxxBROWNxxFOX".Split("xx").
See https://docs.microsoft.com/en-us/dotnet/api/system.string.split?view=netcore-2.0#System_String_Split_System_String_S...
ASP.Net error: “The type 'foo' exists in both ”temp1.dll“ and ”temp2.dll"
... web.config file.
This problem occurs because of the way in which ASP.NET 2.0 uses the application references and the folder structure of the application to compile the application. If the batch property of the element in the web.config file for the application is set to true, ASP.NET 2.0 compiles...
How to Apply Gradient to background view of iOS Swift App
...ar gl:CAGradientLayer!
init() {
let colorTop = UIColor(red: 192.0 / 255.0, green: 38.0 / 255.0, blue: 42.0 / 255.0, alpha: 1.0).cgColor
let colorBottom = UIColor(red: 35.0 / 255.0, green: 2.0 / 255.0, blue: 2.0 / 255.0, alpha: 1.0).cgColor
self.gl = CAGradientLayer()
...
SPA best practices for authentication and session management
... and further down the path of plain ol' RPC on a stateful server.
OAuth 2.0
OAuth 2.0 looks at the problem of "How does Software A give Software B access to User X's data without Software B having access to User X's login credentials."
The implementation is very much just a standard way for a u...
What are the new documentation commands available in Xcode 5? [closed]
...
Swift 2.0 uses the following syntax:
/**
Squares a number.
- parameter parameterName: number The number to square.
- returns: The number squared.
*/
Notice how @param is now - parameter.
You can al...