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ASP.NET MVC: Custom Validation by DataAnnotation
...ValidationAttribute
{
public CombinedMinLengthAttribute(int minLength, params string[] propertyNames)
{
this.PropertyNames = propertyNames;
this.MinLength = minLength;
}
public string[] PropertyNames { get; private set; }
public int MinLength { get; private set; ...
Easiest way to read from and write to files
...rite the string Str to a file
/// </summary>
/// <param name="Str"></param>
/// <param name="Filename"></param>
public static void WriteToFile(this string Str, string Filename)
{
File.WriteAllText(Filename, Str);
...
What is the difference between ${var}, “$var”, and “${var}” in the Bash shell?
...
@NamNguyen If you want to talk about other forms of parameter expansion, there are at least a dozen more: ${parameter:-word}, ${parameter:=word}, ${parameter#word}, ${parameter/pattern/string}, and so on. I think those are beyond the scope of this answer.
...
What is the proper way to check for null values?
...t session, if the type is correct and present
/// </summary>
/// <param name="key">The session key</param>
/// <param name="defaultValue">The default value</param>
/// <returns>Returns a strongly typed session object, or default value</returns>
public static...
Get exception description and stack trace which caused an exception, all as a string
...mat_exc():
import traceback
try:
method_that_can_raise_an_exception(params)
except Exception as ex:
print(''.join(traceback.format_exception(etype=type(ex), value=ex, tb=ex.__traceback__)))
The advantage being that only the Exception object is needed (thanks to the recorded __traceback_...
How to get the index of an item in a list in a single step?
...t;see cref="IEnumerable{T}"/>.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="list">The list.</param>
/// <param name="predicate">The predicate.</param>
/// <returns>
/// The zero-based index of the firs...
Converting a generic list to a CSV string
...
No need to specify generic type parameters in call to ConvertAll here - both int and string will be inferred.
– Pavel Minaev
Dec 11 '09 at 19:01
...
Weighted random numbers
...;typename _IntType>
void
discrete_distribution<_IntType>::param_type::
_M_initialize()
{
if (_M_prob.size() < 2)
{
_M_prob.clear();
return;
}
const double __sum = std::accumulate(_M_prob.begin(),
...
Why use String.Format? [duplicate]
...know what goes where, I have to go back and forth between the text and the params, and that's not even counting the possibility of miscounting and getting it wrong (that may not be an issue with fewer parameters, but go over 10 and it stops being fun). As Ashley pointed out, the second point is null...
Circular gradient in android
...tBackground
}
}
Basic usage (but feel free to adjust with additional params):
view.background = ShaderUtils.radialGradientBackground(Color.TRANSPARENT, BLACK)
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