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Is it better to use Enumerable.Empty() as opposed to new List() to initialize an IEnumerable
...y. As for AsEnumerable, it's not really needed but it prevents Roles being cast to IList and modified.
– Lee
Dec 12 '09 at 18:07
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Difference between numeric, float and decimal in SQL Server
...link:
"I frequently do calculations against decimal values. In some cases casting decimal values to float ASAP, prior to any calculations, yields better accuracy. "
http://sqlblog.com/blogs/alexander_kuznetsov/archive/2008/12/20/for-better-precision-cast-decimals-before-calculations.aspx
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How to do ToString for a possibly null object?
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C# 6.0 Edit:
With C# 6.0 we can now have a succinct, cast-free version of the orignal method:
string s = myObj?.ToString() ?? "";
Or even using interpolation:
string s = $"{myObj}";
Original Answer:
string s = (myObj ?? String.Empty).ToString();
or
string s = (myObjc ?? "")....
How do I convert an object to an array?
...Single-dimensional arrays
For converting single-dimension arrays, you can cast using (array) or there's get_object_vars, which Benoit mentioned in
his answer.
// Cast to an array
$array = (array) $object;
// get_object_vars
$array = get_object_vars($object);
They work slightly different fro...
How do I check for nulls in an '==' operator overload without infinite recursion?
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Cast to object in the overload method:
public static bool operator ==(Foo foo1, Foo foo2) {
if ((object) foo1 == null) return (object) foo2 == null;
return foo1.Equals(foo2);
}
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How to convert ‘false’ to 0 and ‘true’ to 1 in Python
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@AlbertChen: no, because numpy arrays broadcast comparisons and don't produce a boolean value. Instead, comparisons produce an array of boolean values. I'm not sure what you expect from an arrayvalue == 'true' comparison, the question I answered here is specific to a ...
SQL query for today's date minus two months
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SELECT COUNT(1)
FROM FB
WHERE
Dte BETWEEN CAST(YEAR(GETDATE()) AS VARCHAR(4)) + '-' + CAST(MONTH(DATEADD(month, -1, GETDATE())) AS VARCHAR(2)) + '-20 00:00:00'
AND CAST(YEAR(GETDATE()) AS VARCHAR(4)) + '-' + CAST(MONTH(GETDATE()) AS VARCHAR(2)) + '-20 00:00:0...
How do I trim leading/trailing whitespace in a standard way?
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You have to cast the argument for isspace to unsigned char, otherwise you invoke undefined behavior.
– Roland Illig
Sep 18 '16 at 1:56
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How do I check if a C++ std::string starts with a certain string, and convert a substring to an int?
...dy using Boost, you can do it with boost string algorithms + boost lexical cast:
#include <boost/algorithm/string/predicate.hpp>
#include <boost/lexical_cast.hpp>
try {
if (boost::starts_with(argv[1], "--foo="))
foo_value = boost::lexical_cast<int>(argv[1]+6);
} c...
How to capture a list of specific type with mockito
...t to a method requiring a Class<ArrayList<SomeType>>.
You can cast the object to the right type:
Class<ArrayList<SomeType>> listClass =
(Class<ArrayList<SomeType>>)(Class)ArrayList.class;
ArgumentCaptor<ArrayList<SomeType>> argument = A...