Questions tagged [parameters]
Parameters are important for any non trivial program, to help make it generic and data driven. Parameters are usually function arguments but can also be part of the configuration.
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Is it better to pass a specific "context" object to handlers rather than the entire domain object?
I’m designing a system where various "handlers" apply business rules to an object. Initially I had each handler receive the full domain object:
// A large domain object with many properties and ...
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Is it an anti-pattern to support different parameter types when using a dynamically-typed language?
In the Python code base we inherited there are several functions that check parameter types and try to "accommodate" different types. Example:
def process_data(arg):
json_ = {}
if ...
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Why is "one function do more than one thing" a disadvantage of "boolean parameter", but not in "polymorphism"?
According to Is it wrong to use a boolean parameter to determine behavior?, I know using boolean parameters to decide the behaviour is bad, for example, when using boolean parameters as the following:
...
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Why is "dependency injection" ok, but not "the opposite of preserve whole object (pass required parameters only)"?
According to Why should I use dependency injection?, "dependency injection" has some advantages, for example:
"Non dependency injection" version:
public class Client{
private ...
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Why is "hidden dependency" (required things not in parameter list directly) a disadvantage of "global variables", but not in "preserve whole object"?
According to https://softwareengineering.stackexchange.com/a/200092, as I know, "preserve whole object" is a refactor method that passes the whole object instead of required parameters only, ...
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Is "avoid extra null pointer risk" a reason to avoid "introduce parameter objects"?
According to Should we avoid custom objects as parameters?, I know I can group related parameters to improve readability of the function, eg:
Original version:
public void showSchedule(long startDate,...
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When should a function be given an argument vs getting the data itself?
When is it better to pass data to a function in a parameter, and when is it better for the function to just fetch the data itself?
Here's some simplified examples in PowerShell:
Option 1 (give the ...
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Elegant way in C to store many parameters with default value and current value in embedded flash
I'm programming an embedded system that has a number of user configurable parameters, which are stored in flash memory. I have to store a default value for each parameter as well as the user settings. ...
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Should I "introduce parameter object" for the case that the parameter is originally already a whole object?
According to Should we avoid custom objects as parameters?, for example, if I have an object to show:
public class Student{
public int _id;
public String name;
public int age;
public ...
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Is "the boolean value is from dynamic loaded data (eg:user input, database)" a reason to use boolean parameter?
I know there are some questions about boolean flags: Is it wrong to use a boolean parameter to determine behavior?, Multiple boolean arguments - why is it bad? which indicates the following code is ...
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For more than one parameter, when NOT to introduce parameter object?
I know there are some questions about "Introduce parameter object", eg: Is "Introduce Parameter Object" actually a good pattern?, Should we avoid custom objects as parameters?, ...
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Why aren't mandatory options requested in the signature of ASP.NET Core "AddXXX" methods?
I've developing a .NET Core library meant to simplify the configuration of the authentication within our SSO system. It will expose two methods to be called in the Program.cs (or Startup.cs) of ASP....
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Should a method modifying object passed as a parameter return the modified object? [duplicate]
I have some incoming request - it's an instance of class generated from api specification - POJO with public getters/setters.
I would like to normalize some values. For example dimensions (to use ...
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Ordering keyword arguments in a function call
In some languages such as Python, the order of keyword arguments in function calls does not matter. But is there a best practice for it?
For instance, suppose that a function's signature is def foo(...
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What is the purpose of enclosing all return values and arguments of a method in separate classes?
I've seen such a convention. Whenever a public method is declared, two classes are also defined that enclose its return value and parameters like this:
public MethodNameReturnDTO MethodName(...