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.
Questions tagged [named-parameters]
371 questions
10
votes
2 answers
Is there a programming language that performs currying when named parameters are omitted?
Many functional programming languages have support for curried parameters.
To support currying functions the parameters to the function are essentially a tuple where the last parameter can be omitted making a new function requiring a smaller…
Adam Gent
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10
votes
3 answers
Differences between using ? and :param in prepare statement
Let's say I want to select records where Id = 30. Prepared statements allow two ways of binding parameters:
question marks
$id = 30;
$q = $conn->prepare("SELECT * FROM pdo_db WHERE id > ?");
$q->execute(array($id)); // Here above ID will be…
CodeWithCoffee
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2 answers
"Automatically insert all named arguments" at method call-site, in code
Say there is a method,
void M(int a, int b, int c /* and many more */)
Is there a way to transform M() to M(a: .., b: .., c: ..) at the call-site?
I am using Visual Studio 2013 (Ultimate) 2017 Professional with ReSharper 8 ReSharper 2018.1. A…
user2864740
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9
votes
1 answer
Scala Copy() Odd Behavior
I'm experiencing an odd bit of behavior when I use the auto-generated copy() method that was added in Scala-2.8.
From what I've read, when you declare a given class as a case-class, a lot of things are auto-generated for you, one of which is the…
shj
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9
votes
10 answers
C# Named parameters to a string that replace to the parameter values
I want in a good performance way (I hope) replace a named parameter in my string to a named parameter from code, example, my string:
"Hi {name}, do you like milk?"
How could I replace the {name} by code, Regular expressions? To expensive? Which way…
mike
9
votes
6 answers
Better Way To Use C++ Named Parameter Idiom?
I've been developing a GUI library for Windows (as a personal side project, no aspirations of usefulness). For my main window class, I've set up a hierarchy of option classes (using the Named Parameter Idiom), because some options are shared and…
Head Geek
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9
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3 answers
Optional arguments with default value in Ruby
I would like to create a function that has optional arguments with default values
def my_function(a = nil, b=nil, c=500)
end
and call the function with the arguments I would like to specify only
my_function(b=100)
How do I accomplish this in Ruby…
AdamNYC
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9
votes
2 answers
Should I call Parameters.Clear when reusing a SqlCommand with a transation?
I'm coding a transaction manually in ADO.NET. The example I'm working from reuses the SqlCommand which seem like a fine idea.
However, I have added parameters to my command.
My question is: in the following code, is command.Parameters.Clear()…
Aaron Anodide
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9
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1 answer
Ocaml's named parameters
Trying to understand Ocaml's mechanism for named parameters. I understand the basics, but the doc shows an example like this:
# let f ~x ~y = x - y;;
val f : x:int -> y:int -> int =
# let x = 3 and y = 2 in f ~x ~y;;
- : int = 1
What exactly…
scry
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9
votes
2 answers
Why aren't named parameters used more often?
I have designed a parameter class which allows me to write code like this:
//define parameter
typedef basic_config_param name;
void test(config_param param) {
if(param.has()) { //by name
cout << "Your name is: " <<…
Fredrik
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8
votes
2 answers
C# : overloading constructors with optional parameters & named arguments?
This isn't a question on proper coding practice, I'm just working through the semantics.
lets say I have the following constructors...
public FooClass(string name = "theFoo")
{ fooName = name; }
public FooClass(string name, int num = 7, bool boo =…
user1229895
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8
votes
6 answers
Is it possible to skip parameters that have default values in a function call?
I have this:
function foo($a='apple', $b='brown', $c='Capulet') {
// do something
}
Is something like this possible:
foo('aardvark',
sprugman
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8
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2 answers
Is there any tools to help me refactor a method call from using position-based to name-based parameters
I wish to transform code like:
var p = new Person("Ian", "Smith", 40, 16)
To:
var p = new Person(surname: "Ian", givenName:"Smith", weight:40, age:16)
As a first step in making the code more readable, I am willing to use a 3rd party refactoring…
Ian Ringrose
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8
votes
2 answers
How to have optional named arguments in Groovy method
Using the documented mixture of named and positional arguments (or args with default values for that matter), how to invoke a method without specifying any named param?
I'm trying to extend existing shared method without breaking everybody else's…
Sunny Milenov
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8
votes
2 answers
Stored procedure with named parameter and calculation
I'm calling a stored procedure with named parameter.
exec MySP @name = 'binesh', @amount = @amt, @date = @date
It's working fine for me.
But when I'm trying
exec MySP2 @name = 'binesh', @amount = -@amt, @date = @date
or
exec MySP3 @name =…
Binesh Nambiar C
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