This example creates a Polymer element named x-foo, whose template binds to a string property, named "message". The element's HTML is imported into the main document, which allows usage of <x-foo> tags in <body>.
x-foo.html
<dom-module id="x-foo">
<templ...
Load content in webview from the url
Swift
webview.loadRequest(NSURLRequest(URL: NSURL(string: "http://www.google.com")!))
Objective-C
[webview loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.google.com"]]];
The PrettyPrinter utility will 'pretty print' XML documents. The following code snippet pretty prints unformatted xml:
import scala.xml.{PrettyPrinter, XML}
val xml = XML.loadString("<a>Alana<b><c>Beth</c><d>Catie</d></b></a>")
val formatt...
The library CL-PPCRE provides the function split which allows us to split strings in substrings that match a regular expression, discarding the parts of the string that do not.
(cl-ppcre:split "\\." "127.0.0.1")
;; => ("127" "0" "0" "1"...
When you want to return a value from a method, you put the type you want to return in the first set of parentheses.
- (NSString)returnHello {
return @"Hello World";
}
The value you want to return goes after the return keyword;
A class method is called on the class the method belongs to, not an instance of it. This is possible because Objective-C classes are also objects. To denote a method as a class method, change the - to a +:
+ (void)hello {
NSLog(@"Hello World");
}
Calling an instance method:
[classInstance hello];
@interface Sample
-(void)hello; // exposing the class Instance method
@end
@implementation Sample
-(void)hello{
NSLog(@"hello");
}
@end
Calling an instance method on the current instance:
[self hell...
Abstract classes are classes that are meant to be inherited but avoid implementing specific methods, leaving behind only method signatures that subclasses must implement.
Abstract classes are useful for defining and enforcing class abstractions at a high level, similar to the concept of interfaces ...
Defining Strings in the strings.xml file also allows for string formatting. The only caveat is that the String will need to be dealt with in code like below, versus simply attaching it to a layout.
<string name="welcome_trainer">Hello Pokémon Trainer, %1$s! You have caught %2$d Poké...
Unlike C++ in C# you can call a virtual method from class constructor (OK, you can also in C++ but behavior at first is surprising). For example:
abstract class Base
{
protected Base()
{
_obj = CreateAnother();
}
protected virtual AnotherBase CreateAnother()
{
...
You can create a CALayer and set its frame like this:
Swift:
let layer = CALayer()
layer.frame = CGRect(x: 0, y: 0, width: 60, height: 80)
Objective-C:
CALayer *layer = [[CALayer alloc] init];
layer.frame = CGRectMake(0, 0, 60, 80);
You can then add it as a sublayer to an existing CALayer...
To add a method to a button, first create an action method:
Objective-C
-(void)someButtonAction:(id)sender {
// sender is the object that was tapped, in this case its the button.
NSLog(@"Button is tapped");
}
Swift
func someButtonAction() {
print("Button is tapped...
You can easily transform every component in a clickable button using the MouseArea component. The code below displays a 360x360 window with a button and a text in the center; pressing the button will change the text:
import QtQuick 2.0
Rectangle {
width: 360
height: 360
Rectang...
To find all the files of a certain extension within the current path you can use the following find syntax. It works by making use of bash's built-in glob construct to match all the names having the .extension.
find /directory/to/search -maxdepth 1 -type f -name "*.extension"
To find ...
Since Git 1.7.12 it is possible to rebase down to the root commit. The root commit is the first commit ever made in a repository, and normally cannot be edited. Use the following command:
git rebase -i --root
Note that you cannot overload a function based on its return type. For example:
// WRONG CODE
std::string getValue()
{
return "hello";
}
int getValue()
{
return 0;
}
int x = getValue();
This will cause a compilation error as the compiler will not be able to work out wh...
Filters can either be defined in a method and then added to Jinja's filters dictionary, or defined in a method decorated with Flask.template_filter.
Defining and registering later:
def format_datetime(value, format="%d %b %Y %I:%M %p"):
"""Format a date time to (Defau...
TRUNCATE TABLE Employee;
Using truncate table is often better then using DELETE TABLE as it ignores all the indexes and triggers and just removes everything.
Delete table is a row based operation this means that each row is deleted. Truncate table is a data page operation the entire data page is...
