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When to use Cast() and Oftype() in Linq
...EDIT
for example:
object[] objs = new object[] { "12345", 12 };
objs.Cast<string>().ToArray(); //throws InvalidCastException
objs.OfType<string>().ToArray(); //return { "12345" }
share
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...
Shiro vs. SpringSecurity [closed]
...is just that much easier to understand. Things that are unbearably difficult to use in the JDK (e.g. Ciphers) are simplified to a level that is not just bearable, but often a joy to use.
For example, how do you hash+salt a password and base64 encode it in Java or Spring Security? Neither are as...
RGB to hex and hex to RGB
...
Converting the other way:
function hexToRgb(hex) {
var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
return result ? {
r: parseInt(result[1], 16),
g: parseInt(result[2], 16),
b: parseInt(result[3], 16)
} : null;
}
alert(hexToRgb("#0033ff").g...
C# Sort and OrderBy comparison
...
Why not measure it:
class Program
{
class NameComparer : IComparer<string>
{
public int Compare(string x, string y)
{
return string.Compare(x, y, true);
}
}
class Person
{
public Person(string id, string name)
{
...
How to get Visual Studio 'Publish' functionality to include files from post build event?
...e achieve this with the following (remember after the import statement).
<PropertyGroup>
<CopyAllFilesToSingleFolderForPackageDependsOn>
CustomCollectFiles;
$(CopyAllFilesToSingleFolderForPackageDependsOn);
</CopyAllFilesToSingleFolderForPackageDependsOn>
</Property...
Dots in URL causes 404 with ASP.NET mvc and IIS
...o your site's web.config within the system.webServer / handlers element:
<add name="ApiURIs-ISAPI-Integrated-4.0"
path="/people/*"
verb="GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS"
type="System.Web.Handlers.TransferRequestHandler"
preCondition="integratedMode,runtimeVersion...
Identify duplicates in a List
...e Set documentation).
So just iterate through all the values:
public Set<Integer> findDuplicates(List<Integer> listContainingDuplicates)
{
final Set<Integer> setToReturn = new HashSet<>();
final Set<Integer> set1 = new HashSet<>();
for (Integer yourInt ...
What differences, if any, between C++03 and C++11 can be detected at run-time?
...
Core Language
Accessing an enumerator using :::
template<int> struct int_ { };
template<typename T> bool isCpp0xImpl(int_<T::X>*) { return true; }
template<typename T> bool isCpp0xImpl(...) { return false; }
enum A { X };
bool isCpp0x() {
return isCpp0xI...
Hidden features of Python [closed]
...
Chaining comparison operators:
>>> x = 5
>>> 1 < x < 10
True
>>> 10 < x < 20
False
>>> x < 10 < x*10 < 100
True
>>> 10 > x <= 9
True
>>> 5 == x > 4
True
In case you're thinking it's doing 1 < x, which ...
Is div inside list allowed? [duplicate]
...cording to xhtml1-strict.dtd. The following XHTML passes the validation:
<?xml version="1.0"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<...