Stack Overflow
Stack Overflow

Questions tagged [named-parameters]

Named parameters enable you to specify an argument for a particular parameter by associating the argument with the parameter's name rather than with the parameter's position in the parameter list.

371 questions
22
votes
4 answers

Can named arguments be used with Python enums?

Example: class Planet(Enum): MERCURY = (mass: 3.303e+23, radius: 2.4397e6) def __init__(self, mass, radius): self.mass = mass # in kilograms self.radius = radius # in meters Ref:…
kevinarpe
  • 20,319
  • 26
  • 127
  • 154
21
votes
3 answers

Can you combine named parameter with short-hand constructor parameter?

In dart: Named parameters function like so- String send(msg, {rate: 'First Class'}) { return '${msg} was sent via ${rate}'; } // you can use named parameters if the argument is optional send("I'm poor", rate:'4th class'); // == "I'm poor was sent…
Jordan
  • 1,003
  • 2
  • 12
  • 24
20
votes
5 answers

Emulating named function parameters in PHP, good or bad idea?

Named function parameters can be emulated in PHP if I write functions like this function pythonic(array $kwargs) { extract($kwargs); // .. rest of the function body } // if params are optional or default values are required function…
Imran
  • 87,203
  • 23
  • 98
  • 131
20
votes
3 answers

Named and optional parameters, and WCF

so .Net 4 added named and optional parameters which are pretty sweet. I don't need to make as many 1 line overload methods. Will that work over WCF?
puffpio
  • 3,402
  • 6
  • 36
  • 41
20
votes
5 answers

Determine if a named parameter was passed

I would like to know if it is possible to determine if a function parameter with a default value was passed in Python. For example, how does dict.pop work? >>> {}.pop('test') Traceback (most recent call last): File "", line 1, in…
Jake
  • 3,427
  • 2
  • 28
  • 23
20
votes
2 answers

python sqlite insert named parameters or null

I'm trying to insert data from a dictionary into a database using named parameters. I have this working with a simple SQL statement e.g. SQL = "INSERT INTO status (location, arrival, departure) VALUES (:location, :arrival,:departure)" dict =…
user2497185
  • 303
  • 1
  • 2
  • 6
20
votes
10 answers

How to define named Parameters C#

This seems like a simple question, but for some reason I can't find the answer anywhere. Basically, I'd like to be able to implement a constructor that takes NamedParameters. By named parameters, I do not mean parameters with default values…
Pierluc SS
  • 3,138
  • 7
  • 31
  • 44
19
votes
2 answers

Named Parameters and the params keyword in C#

I have a C# method with a variable length argument list declared using the params keyword: public void VariableLengthParameterFunction (object firstParam, params object[] secondParam) Is there any way…
marosoaie
  • 2,352
  • 23
  • 32
18
votes
3 answers

Is it possible for an optional argument value to depend on another argument in Scala

Does anyone know if something like this is possible in Scala: case class Thing(property:String) def f(thing:Thing, prop:String = thing.property) = println(prop) The above code doesn't compile; giving the error error: not found: value thing at…
Kristian Domagala
  • 3,686
  • 20
  • 22
18
votes
4 answers

When to use keyword arguments aka named parameters in Ruby

Ruby 2.0.0 supports keyword arguments (KA) and I wonder what the benefits/use-cases are of this feature in context of pure Ruby, especially when seen in light of the performance penalty due to the keyword matching that needs to be done every time a…
saihgala
  • 5,724
  • 3
  • 34
  • 31
17
votes
2 answers

Why doesn't MySQLi library natively support named parameters?

Proper MySQLi parameterized query syntax from http://php.net/manual/en/mysqli.quickstart.prepared-statements.php: $stmt = $mysqli->prepare("INSERT INTO test(id) VALUES (?)"); $stmt->bind_param("i", $id); But never something like: $stmt =…
Dennis
  • 7,907
  • 11
  • 65
  • 115
16
votes
3 answers

What rules does HTML follow when constructing parameters?

I'm using Rails to auto-magically create child objects based on a complex set of nested attributes. Therefore, I need the parameters to be nested in a very particular way. Obviously I realize I can construct them however I want with JS, but I'd like…
james
  • 3,989
  • 8
  • 47
  • 102
16
votes
2 answers

"Error: The function applied to this argument has type ..." when using named parameters

I'm currently working through "Real Word OCaml", and one of the basic examples with named / labeled parameters doesn't seem to work (using utop 4.01.0): let languages = ["OCaml"; "Perl"; "C"];; List.map ~f:String.length languages;; Produces: Error:…
Frank Schmitt
  • 30,195
  • 12
  • 73
  • 107
15
votes
5 answers

Resharper - keep named parameters when doing code cleanup

We've adopted a convention that when calling a C# function with a "non-obvious" parameter, we use a named parameter even when it's not necessary. E.g. obj.Process(save: true) rather than obj.Process(true) While it's unnecessary, it makes it a lot…
Stuart Moore
  • 681
  • 5
  • 32
15
votes
5 answers

How do you curry the 2nd (or 3rd, 4th, ...) parameter in F# or any functional language?

I'm just starting up with F# and see how you can use currying to pre-load the 1st parameter to a function. But how would one do it with the 2nd, 3rd, or whatever other parameter? Would named parameters to make this easier? Are there any other…
Dax Fohl
  • 10,654
  • 6
  • 46
  • 90
1 2
3
…
24 25