If you want to import a module that doesn't already exist as a built-in module in the Python Standard Library nor as a side-package, you can do this by adding the path to the directory where your module is found to sys.path. This may be useful where multiple python environments exist on a host.
im...
Creating a Custom Element with bindable properties is a snap. If you want to create an element that accepts one or more values which the plugin can use, the @bindable decorator and syntax is what you are looking for.
Below, we are creating a custom element that accepts an array of fruits and displa...
In the following, we are creating an example of an Aurelia Custom Element which will allow you to display Youtube videos via their video ID.
An Aurelia Custom Element can be defined in two different ways:
the first one is by creating a viewmodel and accompanying view, the second one is by just cre...
A basic custom element is created in Aurelia based on naming conventions, by simply adding the suffix CustomElement to the name of a class. This suffix will automatically be stripped out by Aurelia. The remaining part of the class name will be lowercased and separated using a hyphen and can then be ...
JSON data can also be read from files.
Let's assume we have a file called data.json with the following content:
[
{
"Name" : "John Doe",
"Standard" : 4
},
{
"Name" : "Peter Parker",
"Standard" : ...
With the shape-outside CSS property one can define shape values for the float area so that the inline content wraps around the shape instead of the float's box.
CSS
img:nth-of-type(1) {
shape-outside: circle(80px at 50% 50%);
float: left;
width: 200px;
}
img:nth-of-type(2) {
shape-ou...
Given a JList like
JList myList = new JList(items);
the selected items in the list can be modified through the ListSelectionModel of the JList:
ListSelectionModel sm = myList.getSelectionModel();
sm.clearSelection(); // clears the selection
sm.setSelectionInterval(inde...
This example adds a list of places with image and name by using an ArrayList of custom Place objects as dataset.
Activity layout
The layout of the activity / fragment or where the RecyclerView is used only has to contain the RecyclerView. There is no ScrollView or a specific layout needed.
<?x...
There are situations when you need to calculate something really large in your Flash application, while not interrupting the user's experience. For this, you need to devise your lengthy process as a multi-step process with saved state between iterations. For example, you need to perform a background...
The Iterator.remove() method is an optional method that removes the element returned by the previous call to Iterator.next(). For example, the following code populates a list of strings and then removes all of the empty strings.
List<String> names = new ArrayList<>();
names.add("...
It is possible to define local variables inside a function to
reduce code repetition
give name to subexpressions
reduce the amount of passed arguments.
The construct for this is let ... in ....
bigNumbers =
let
allNumbers =
[1..100]
isBig number =
...
When you inherit from a class with a property, you can provide a new implementation for one or more of the property getter, setter or deleter functions, by referencing the property object on the parent class:
class BaseClass(object):
@property
def foo(self):
return some_calculate...
The following example listens to window.onerror event and uses an image beacon technique to send the information through the GET parameters of an URL.
var hasLoggedOnce = false;
// Some browsers (at least Firefox) don't report line and column numbers
// when event is handled through window.addE...
List doesn't support "random access", which means it takes more work to get, say, the fifth element from the list than the first element, and as a result there's no List.get nth list function. One has to go all the way from the beginning (1 -> 2 -> 3 -> 4 -> 5).
If you need ra...
arr = np.arange(7)
print(arr)
# Out: array([0, 1, 2, 3, 4, 5, 6])
Comparison with a scalar returns a boolean array:
arr > 4
# Out: array([False, False, False, False, False, True, True], dtype=bool)
This array can be used in indexing to select only the numbers greater than 4:
arr[arr&...
In the condition of the for and while loops, it's also permitted to declare an object. This object will be considered to be in scope until the end of the loop, and will persist through each iteration of the loop:
for (int i = 0; i < 5; ++i) {
do_something(i);
}
// i is no longer in scope...
