The MasterType directive assigns a class name to the Master property of a page, to make it strongly typed.
The basic syntax of MasterType directive is:
<%@ MasterType attribute="value"[attribute="value" ...] %>
The Page directive defines the attributes specific to the page file for the page parser and the compiler.
The basic syntax of Page directive is:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" Trace="tr...
The OutputCache directive controls the output caching policies of a web page or a user control.
The basic syntax of OutputCache directive is:
<%@ OutputCache Duration="15" VaryByParam="None" %>
You can also use regular expressions to split a string. For example,
import re
data = re.split(r'\s+', 'James 94 Samantha 417 Scarlett 74')
print( data )
# Output: ['James', '94', 'Samantha', '417', 'Scarlett', '74']
By default, Django renders ForeignKey fields as a <select> input. This can cause pages to be load really slowly if you have thousands or tens of thousand entries in the referenced table. And even if you have only hundreds of entries, it is quite uncomfortable to look for a particular entry amo...
Using threading & queue:
from socket import socket, AF_INET, SOCK_STREAM
from threading import Thread
from queue import Queue
def echo_server(addr, nworkers):
print('Echo server running at', addr)
# Launch the client workers
q = Queue()
for n in range(nworkers):
...
Record syntax can be used with newtype with the restriction that there is exactly one constructor with exactly one field. The benefit here is the automatic creation of a function to unwrap the newtype. These fields are often named starting with run for monads, get for monoids, and un for other typ...
Using Kestrel you can specify port using next approaches:
Defining ASPNETCORE_URLS environment variable.
Windows
SET ASPNETCORE_URLS=https://0.0.0.0:5001
OS X
export ASPNETCORE_URLS=https://0.0.0.0:5001
Via command line passing --server.urls parameter
dotnet run --server.urls=http...
You can select elements with different selectors :
by tag : "div"
by class : ".class"
by id : "#id"
by attribute : "[color=blue]"
multiple selectors (OR): "div1, div2, class1"
multiple selectors (AND): "div1 div2 class1"
If a covariant type appears as an output, the containing type is covariant. Producing a producer of Ts is like producing Ts.
interface IReturnCovariant<out T>
{
IEnumerable<T> GetTs();
}
If a contravariant type appears as an output, the containing type is contravariant. Produc...
With ASP.NET Core 1.0, the MVC and Web API framework have been merged into one framework called ASP.NET Core MVC. This is a good thing, since MVC and Web API share a lot of functionality, yet there always were subtle differences and code duplication.
However, merging these two into framework one ...
F|forbidden
Similar to Deny, this flag forces the server to immediately return a 403 Forbidden status code to the requesting browser or client for the request.
Example: Deny access to requests that end with exe:
RewriteRule .exe$ - [F]
G|gone
If a requested resource was available in the past,...
Unity works with hierarchies in order to keep your project organized. You can assign objects a place in the hierarchy using the editor but you can also do this through code.
Parenting
You can set an object's parent with the following methods
var other = GetOtherGameObject();
other.transform.Se...
Destructuring also gives you the ability to interpret a sequence as a map:
(def my-vec [:a 1 :b 2])
(def my-lst '("smthg else" :c 3 :d 4))
(let [[& {:keys [a b]}] my-vec
[s & {:keys [c d]} my-lst]
(+ a b c d)) ;= 10
It is useful for defining functions with named p...
Predicates that produce side effects leave the realm of pure logic. These are for example:
writeq/1
read/1
format/2
Side effects are phenomena that cannot be reasoned about within the program. For example, deletion of a file or output on the system terminal.
Predicates that reason about instantiations are called meta-logical. Examples are:
var/1
ground/1
integer/1
These predicates are outside the realm of pure monotonic logic programs, because they break properties like commutativity of conjunction.
Other predicates that are meta-logical includ...
In oracle, the difference (in days and/or fractions thereof) between two DATEs can be found using subtraction:
SELECT DATE '2016-03-23' - DATE '2015-12-25' AS difference FROM DUAL;
Outputs the number of days between the two dates:
DIFFERENCE
----------
89
And:
SELECT TO_DATE( '201...
We create a new concurrent process by calling the spawn function. The spawn function will get as parameter a function Fun that the process will evaluate. The return value of the spawn function is the created process identifier (pid).
1> Fun = fun() -> 2+2 end.
#Fun<erl_eval.20.52032458>...
Sometimes, we may open a file which we do not have permission to write in Vim without using sudo.
Use this command to save a read-only file edited in Vim.
:w !sudo tee > /dev/null %
Which you could map to :w!! in your .vimrc:
cmap w!! w !sudo tee > /dev/null %
You will be presented a ...
