Try hasattr(): if hasattr(a, ‘property’): a.property See zweiterlinde’s answer below, who offers good advice about asking forgiveness! A very pythonic approach! The general practice in python is that, if the property is likely to be there most of the time, simply call it and either let the exception propagate, or trap it with a try/except … Read more
my solution: $(‘#myinput’).clone().attr(‘type’,’tel’).insertAfter(‘#myinput’).prev().remove();
Property binding like [trueValue]=”…” evaluates the expression “…” and assigns the value “true” evaluates to the value true “Y” is unknown. There is no internal Y value in TypeScript and no property in the component class instance, which is the scope of template binding. In this case you would want [trueValue]=”‘Y'” Note the additional quotes … Read more
There are cases where you can’t rely on the calling code to pass a type reference. Below is a solution I cooked up to solve this problem. It’s a bit of a shot-gun approach, but it does work… using System; using System.Reflection; using System.Collections.Generic; using System.Linq; using System.Diagnostics; namespace Ethica.Reflection { /// <summary> /// Helps … Read more
I just want to point out that while most of the responders assumed these were unit tests, the question did not specify that they were. nUnit is a great tool that can be used for a variety of testing situations. I can see appropriate reasons for wanting to control test order. In those situations I … Read more
just this as img tag is a content element img { content:url(http://example.com/image.png); }
This is a remarkably poorly documented feature of .NET Remoting. It doesn’t have anything to do with whether your class is [Serializable] or derived from MarshalByRefObject. At issue here is how the argument is marshaled across the AppDomain boundary. The call itself is made under the hood by Remoting. Arrays do not automatically get marshaled … Read more
Attributes on interface properties doesn’t get inherited to the class, you may make your interface an Abstract Class. Found an answer from Microsoft: The product team does not want to implement this feature, for two main reasons: Consistency with DataAnnotations.Validator Consistency with validation behavior in ASP.Net MVC tricky scenario: a class implements two interfaces that … Read more
Generic adaptor to compare based on member attributes. While it is quite more verbose the first time it is reusable. // Generic member less than template <typename T, typename M, typename C> struct member_lt_type { typedef M T::* member_ptr; member_lt_type( member_ptr p, C c ) : ptr(p), cmp(c) {} bool operator()( T const & lhs, … Read more
It’s possible from .NET 4.5 using CallerMemberName: [SomethingCustom] public string MyProperty { get; set; } Then your attribute: [AttributeUsage(AttributeTargets.Property)] public class SomethingCustomAttribute : Attribute { public StartupArgumentAttribute([CallerMemberName] string propName = null) { // propName == “MyProperty” } }