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 ...
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...
Intents can be used to broadcast messages to other components of your application (such as a running background service) or to the entire Android system.
To send a broadcast within your application, use the LocalBroadcastManager class:
Intent intent = new Intent("com.example.YOUR_ACTION"...
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...
This code selects data out of a table and displays it in the query tool (usually SSMS)
SELECT Column1, Column2, Column3 FROM MySourceTable;
This code inserts that data into a table:
INSERT INTO MyTargetTable (Column1, Column2, Column3)
SELECT Column1, Column2, Column3 FROM MySourceTable;
This code selects data out of a table:
SELECT Column1, Column2, Column3 FROM MySourceTable;
This code creates a new table called MyNewTable and puts that data into it
SELECT Column1, Column2, Column3
INTO MyNewTable
FROM MySourceTable;
Since C# 6.0 exceptions can be filtered using the when operator.
This is similar to using a simple if but does not unwind the stack if the condition inside the when is not met.
Example
try
{
// ...
}
catch (Exception e) when (e.InnerException != null) // Any condition can go in here.
{
...
Example is the main part of Documentation, it is thus important to provide clear and useful examples.
Good examples are self-contained and succinct. Examples usually would have code for users to understand the topic better.
Refer to the Help Center for more information.
You can access SharedPreferences in several ways:
Get the default SharedPreferences file:
import android.preference.PreferenceManager;
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
Get a specific SharedPreferences file:
public static final String PREF_FILE_NAM...
The shift operators allow programmers to adjust an integer by shifting all of its bits to the left or the right. The following diagram shows the affect of shifting a value to the left by one digit.
Left-Shift
uint value = 15; // 00001111
uint doubled = value << 1; // Resu...
Within a catch block the throw keyword can be used on its own, without specifying an exception value, to rethrow the exception which was just caught. Rethrowing an exception allows the original exception to continue up the exception handling chain, preserving its call stack or associated data:
try...
The display CSS property is fundamental for controlling the layout and flow of an HTML document. Most elements have a default display value of either block or inline (though some elements have other default values).
Inline
An inline element occupies only as much width as necessary. It stacks horiz...
A Sub is a procedure that performs a specific task but does not return a specific value.
Sub ProcedureName ([argument_list])
[statements]
End Sub
If no access modifier is specified, a procedure is Public by default.
A Function is a procedure that is given data and returns a value, ideally...
SRXMPPDemo
Download the example and all the classes here - https://github.com/SahebRoy92/SRXMPPDemo
A demo on XMPP in Objective C, with various simple and complex features implemented in it. All the features of XMPP is done by "in band" xmpp functions.
Few features this project contains...
