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Conditionally required property using data annotations 129 RequiredIf validation attribute I've written a RequiredIfAttribute that requires a particular property value when a different property has a certain value (what you require) or when a different property has anything but a specific value This is the code that may help:
oop - what is a member vs. a property - Stack Overflow Property is a broad concept used to denote a particular characteristic of a class which, once the class is instantiated, will help define the object's state The following passages, extracted from "Object-Oriented Analysis and Design" by Grady Booch help clarify the subject Firstly, it's important to understand the concepts of state and behaviour:
python - How to make a class property? - Stack Overflow Descriptors like property need to be in the type's dictionary to work their magic So those in a class definition primarily affect the behaviour of instances of the class, with minimal effect on the behaviour of the class itself (since the class is the type of the instances)
How can you test if an object has a specific property? The solution that appears to iterate through every property and uses a regular expression is a little slower than the previous two solutions (because compiling and executing the regular expression takes more time)
How to add property to a class dynamically? - Stack Overflow 16 How to add property to a python class dynamically? Say you have an object that you want to add a property to Typically, I want to use properties when I need to begin managing access to an attribute in code that has downstream usage, so that I can maintain a consistent API
error TS2339: Property x does not exist on type Y When accessing a property, the "dot" syntax (images main) supposes, I think, that it already exists I had such problems without Typescript, in "vanilla" Javascript, where I tried to access data as: return json property[0] index where index was a variable But it interpreted index, resulting in a: cannot find property "index" of json property[0]
When is the @JsonProperty property used and what is it used for? 1 From JsonProperty javadoc, Defines name of the logical property, i e JSON object field name to use for the property If value is empty String (which is the default), will try to use name of the field that is annotated
What does the = gt; operator mean in a property or method? In my situation I had my property auto initialize a command in a ViewModel for a View I changed the property to use expression bodied initializer and the command CanExecute stopped working Here's what it looked like and here's what was happening