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Update all values of a column to lowercase
...hes the given name and argument types. You might need to add explicit type casts.
– Luna Lovegood
Oct 11 '19 at 7:16
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How to list only top level directories in Python?
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Filter the result using os.path.isdir() (and use os.path.join() to get the real path):
>>> [ name for name in os.listdir(thedir) if os.path.isdir(os.path.join(thedir, name)) ]
['ctypes', 'distutils', 'encodings', 'lib-tk', 'config', 'idlelib', 'xml', 'bsdd...
What's the difference between ViewData and ViewBag?
...s advantage of the new dynamic features
in C# 4.0. ViewData requires typecasting for complex data type and
check for null values to avoid error. ViewBag doesn’t require
typecasting for complex data type.
ViewBag & ViewData Example:
public ActionResult Index()
{
ViewBag.Name = "...
Difference between os.getenv and os.environ.get
...s about os.environ.get() which returns None (unless specified differently) and never raises an exception if the env. var. doesn't exists. Your confusing things with using os.environ['TERM'] which is not what the question is about.
– Anthon
Apr 21 '17 at 7:41
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How to detect the current OS from Gradle
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Actually, I looked at the Gradle project, and this looks a little cleaner as it uses Ant's existing structure:
import org.apache.tools.ant.taskdefs.condition.Os
task checkWin() << {
if (Os.isFamily(Os.FAMILY_WINDOWS)) {
println "*** Windows "
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new keyword in method signature
...ass.
Keep in mind that creating a "new" member is not polymorphic. If you cast the object to the base type, it will not use the derived type's member.
If you have a base class:
public class BaseClass
{
public void DoSomething() { }
}
And then the derived class:
public class DerivedType : B...
How do I obtain a Query Execution Plan in SQL Server?
...rosoft.com/sqlserver/2004/07/showplan' as sql),
CTE
as (SELECT CAST(TextData AS VARCHAR(MAX)) AS TextData,
ObjectID,
ObjectName,
EventSequence,
/*costs accumulate up the tree so the MAX should be the root*/
M...
RESTful web service - how to authenticate requests from other services?
...eb service that needs to be accessed by users, but also other web services and applications. All of the incoming requests need to be authenticated. All communication takes place over HTTPS. User authentication is going to work based on an authentication token, acquired by POSTing the username and pa...
Test if executable exists in Python?
In Python, is there a portable and simple way to test if an executable program exists?
21 Answers
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What is boxing and unboxing and what are the trade offs?
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from C# 3.0 In a Nutshell:
Boxing is the act of casting a value
type into a reference type:
int x = 9;
object o = x; // boxing the int
unboxing is... the reverse:
// unboxing o
object o = 9;
int x = (int)o;
...