Of the LINQ methods which use deferred execution, some require a single value to be evaluated at a time. The following code:
var lst = new List<int>() {3, 5, 1, 2};
var streamingQuery = lst.Select(x => {
Console.WriteLine(x);
return x;
});
foreach (var i in streamingQuery) {
...
Let's take a sample class.
class Book:
def __init__(self, title, author):
self.title = title
self.author = author
book1 = Book(title="Right Ho, Jeeves", author="P.G. Wodehouse")
In Python you can access the attribute title of the class using the dot ...
It is possible to use IO.inspect/1 as a tool to debug an elixir program.
defmodule MyModule do
def myfunction(argument_1, argument_2) do
IO.inspect(argument_1)
IO.inspect(argument_2)
end
end
It will print out argument_1 and argument_2 to the console. Since IO.inspect/1 returns i...
ChoiceDialog allows the user to pick one item from a list of options.
List<String> options = new ArrayList<>();
options.add("42");
options.add("9");
options.add("467829");
options.add("Other");
ChoiceDialog<String> dialog = new Choice...
For example, types for SI units have been standardized in the F# core library, in Microsoft.FSharp.Data.UnitSystems.SI. Open the appropriate sub-namespace, UnitNames or UnitSymbols, to use them. Or, if only a few SI units are required, they can be imported with type aliases:
/// Seconds, the SI uni...
If you don't have permissions to install perl modules, you may still install them manually, indicating a custom path where you've got writing permissions.
Fist, download and unzip module archive:
wget module.tar.gz
tar -xzf module.tar.gz
cd module
Then, if the module distribution contains a M...
All values in Rust have exactly one owner. The owner is responsible for dropping that value when it goes out of scope, and is the only one who may move the ownership of the value. The owner of a value may give away references to it by letting other pieces of code borrow that value. At any given time...
All values in Rust have a lifetime. A value's lifetime spans the segment of code from the value is introduced to where it is moved, or the end of the containing scope
{
let x = String::from("hello"); // +
// ... :
let y = S...
Most of the questions around ownership come up when writing functions. When you specify the types of a function's arguments, you may choose how that value is passed in. If you only need read-only access, you can take an immutable reference:
fn foo(x: &String) {
// foo is only authorized to...
Some Rust types implement the Copy trait. Types that are Copy can be moved without owning the value in question. This is because the contents of the value can simply be copied byte-for-byte in memory to produce a new, identical value. Most primitives in Rust (bool, usize, f64, etc.) are Copy.
let x...
After Successfully installing Xamarin Studio on OS X.
It's time for the first Hello World Application.
Hello World Application: Xamarin.Forms
What is Xamarin Forms :
Xamarin.Forms is a new library that enables you to build native UIs for iOS, Android and Windows Phone from a single, shared C# c...
This example shows how to establish a connection to an SSL-enabled POP3 email server and send a simple (text only) email.
// Configure mail provider
Properties props = new Properties();
props.put("mail.smtp.host", "smtp.mymailprovider.com");
props.put("ma...
Because generating documentation is based on markdown, you have to do 2 things :
1/ Write your doctest and make your doctest examples clear to improve readability (It is better to give a headline, like "examples" or "tests"). When you write your tests, do not forget to give 4 s...
Once you've installed the .NET CLI tools, you can create a new project with the following command:
dotnet new --lang f#
This creates a command line program.
Specifies how the database generates values for the property. There are three possible values:
None specifies that the values are not generated by the database.
Identity specifies that the column is an identity column, which is typically used for integer primary keys.
Computed specifies that th...
By Code-First convention, Entity Framework creates a column for every public property that is of a supported data type and has both a getter and a setter. [NotMapped] annotation must be applied to any properties that we do NOT want a column in a database table for.
An example of a property that we ...
public class Person
{
public int PersonID { get; set; }
public string PersonName { get; set; }
[Index]
public int Age { get; set; }
}
Creates a database index for a column or set of columns.
[Index("IX_Person_Age")]
public int Age { get; set; }
This creates ...
To find active ScriptableObjects during runtime, you can use Resources.FindObjectsOfTypeAll().
T[] instances = Resources.FindObjectsOfTypeAll<T>();
Where T is the type of the ScriptableObject instance you're searching. Active means it has been loaded in memory in some form before.
This me...
If you have nested lists, it is desireable to clone the nested lists as well. This action is called deep copy.
>>> import copy
>>> c = [[1,2]]
>>> d = copy.deepcopy(c)
>>> c is d
False
>>> c[0] is d[0]
False
