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What is the $? (dollar question mark) variable in shell scripting? [duplicate]
...al Parameters" http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_05_02 :
? Expands to the decimal exit status of the most recent pipeline (see Pipelines).
man bash "Special Parameters":
The shell treats several parameters specially. These parameters may only be refe...
Can't find Request.GetOwinContext
... in the startup. So it came out like this:
private readonly IOwinContext _iOwinContext = HttpContext.Current.GetOwinContext();
public ApplicationUserManager UserManager
{
get
{
return _userManager ?? _iOwinContext.Get<ApplicationUserManager>() ;
}
...
Favorite Django Tips & Features?
...cated within the Django project directory:
# settings.py
import os
PROJECT_DIR = os.path.dirname(__file__)
...
STATIC_DOC_ROOT = os.path.join(PROJECT_DIR, "static")
...
TEMPLATE_DIRS = (
os.path.join(PROJECT_DIR, "templates"),
)
Credits: I got this tip from the screencast 'Django From the Gro...
How to permanently set $PATH on Linux/Unix? [closed]
...directories like /usr/local/something/bin to PATH variable or defining JAVA_HOME. Used by PAM and SystemD.
/etc/environment.d/*.conf List of unique assignments, allows references. Perfect for adding system-wide directories like /usr/local/something/bin to PATH variable or defining JAVA_HOME. The co...
Optional query string parameters in ASP.NET Web API
...imit As Integer = 99)
In your WebApiConfig
config.Routes.MapHttpRoute( _
name:="books", _
routeTemplate:="api/{controller}/{action}/{id}/{pid}/{sort}/{limit}", _
defaults:=New With {.id = RouteParameter.Optional, .pid = RouteParameter.Optional, .sort = UrlParameter....
What is the purpose of double curly braces in React's JSX syntax?
... an object literal inlined in the prop value. It's the same as
var obj = {__html: rawMarkup};
<span dangerouslySetInnerHTML={obj} />
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fo...
In a PHP project, what patterns exist to store, access and organize helper objects? [closed]
...eLocator.html
dependency injection
http://en.wikipedia.org/wiki/Dependency_injection
and a php explanation:
http://components.symfony-project.org/dependency-injection/trunk/book/01-Dependency-Injection
This is a good article about these alternatives:
http://martinfowler.com/articles/injection....
How to do a case sensitive search in WHERE clause (I'm using SQL Server)?
...the link:
SELECT 1
FROM dbo.Customers
WHERE CustID = @CustID COLLATE SQL_Latin1_General_CP1_CS_AS
AND CustPassword = @CustPassword COLLATE SQL_Latin1_General_CP1_CS_AS
Or, change the columns to be case sensitive.
sh...
PHP - Debugging Curl
...
You can enable the CURLOPT_VERBOSE option:
curl_setopt($curlhandle, CURLOPT_VERBOSE, true);
When CURLOPT_VERBOSE is set, output is written to STDERR or the file specified using CURLOPT_STDERR. The output is very informative.
You can also use tcpdu...
How to convert a Django QuerySet to a list
...
You could do this:
import itertools
ids = set(existing_answer.answer.id for existing_answer in existing_question_answers)
answers = itertools.ifilter(lambda x: x.id not in ids, answers)
Read when QuerySets are evaluated and note that it is not good to load the whole result int...