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 ...
First the setup for the example:
import datetime as dt
from sqlalchemy import Column, Date, Integer, Text, create_engine, inspect
from sqlalchemy.orm import sessionmaker
from sqlalchemy.ext.declarative import declarative_base
Base = declarative_base()
Session = sessionmaker()
class User(B...
In SQLAlchemy core, the result is RowProxy. In cases where you want an explicit dictionary, you can call dict(row).
First the setup for the example:
import datetime as dt
from sqlalchemy import (
Column, Date, Integer, MetaData, Table, Text, create_engine, select)
metadata = MetaData()
u...
A resource is a special type of variable that references an external resource, such as a file, socket, stream, document, or connection.
$file = fopen('/etc/passwd', 'r');
echo gettype($file);
# Out: resource
echo $file;
# Out: Resource id #2
There are different (sub-)types of resource. Y...
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...
Shiny is an R package developed by RStudio that allows the creation of web pages to interactively display the results of an analysis in R.
There are two simple ways to create a Shiny app:
in one .R file, or
in two files: ui.R and server.R.
A Shiny app is divided into two parts:
ui: A user...
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("...
With Maven you can create Vaadin project with vaadin-archetype-application archetype. You can also add that archetype in IDE to create maven project with IDE.
mvn archetype:generate
-DarchetypeGroupId=com.vaadin
-DarchetypeArtifactId=vaadin-archetype-application
-DarchetypeVersion=7....
Elm has a special syntax for lambda expressions or anonymous functions:
\arguments -> returnedValue
For example, as seen in List.filter:
> List.filter (\num -> num > 1) [1,2,3]
[2,3] : List number
More to the depth, a backward slash, \, is used to mark the beginning of lambda ex...
File streams are buffered by default, as are many other types of streams. This means that writes to the stream may not cause the underlying file to change immediately. In oder to force all buffered writes to take place immediately, you can flush the stream. You can do this either directly by invokin...
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...
Sub RemComments()
Rem Comments start with "Rem" (VBA will change any alternate casing to "Rem")
Rem is an abbreviation of Remark, and similar to DOS syntax
Rem Is a legacy approach to adding comments, and apostrophes should be preferred
Rem Comments CANNOT appear af...
Usually authentication&authorization processes are performed by built-in cookie and token supports in .net MVC. But if you decide to do it yourself with Session you can use below logic for both page requests and ajax requests.
public class SessionControl : ActionFilterAttribute
{
public o...
The numpy.reshape (same as numpy.ndarray.reshape) method returns an array of the same total size, but in a new shape:
print(np.arange(10).reshape((2, 5)))
# [[0 1 2 3 4]
# [5 6 7 8 9]]
It returns a new array, and doesn't operate in place:
a = np.arange(12)
a.reshape((3, 4))
print(a)
# ...
