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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
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