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
7
votes
2 answers
Named Parameters solution in PHP 7+
How can I implement the named argument feature in PHP 7+?
The ideal syntax is:
find($wildcard, relative = true, listIfEmpty = false) {
...
}
But there is no such solution.
In the answer, I implemented the shortest possible solution that…
Behnam
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7
votes
1 answer
Does VBScript allow named arguments in function calls?
I am trying to run the following code in VBScript but it is not compiling the last statement. Is it because VBScript doesn't allow named arguments?
Filename_Argument = WScript.Arguments(0)
Set objExcel =…
CJ7
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7
votes
1 answer
require named parameters in python function
I have created a class and I would like to give the user (probably me) two different ways to initialize it. For this example the class is called Box and I would like to initialize it with either:
two sets of Cartesian coordinates, representing the…
VectorVictor
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7
votes
3 answers
How to used named parameters with a curried function in scala
I have a method with 4 parameters that gets used in blocks. Within each block, the first parameter is always the same:
// Block 1 - first parameter always "A"
foo(a="A", b="x", c="y", d="z")
foo(a="A", b=".", c=",", d="-")
foo(a="A", b="1", c="2",…
rmin
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7
votes
4 answers
JavaScript function with optional parameters
I'm new to JavaScript coming from Python background. In Python parameters can be passed as key and value as such:
def printinfo( name, age = 35 ):
print "Name: ", name
print "Age ", age
return;
Then the function could be called as…
codeBarer
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7
votes
1 answer
Can't use a negative number in named parameters in Scala
I'm using Scala 2.11.2.
If I have this Fraction class:
case class Fraction(numerator: Int, denominator: Int) {}
Then this gives an error:
val f = new Fraction(numerator=-1, denominator=2)
But this is not:
val f = new Fraction(-1,…
gaijinco
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7
votes
4 answers
Idiomatic Scala for applying functions in a chain if Option(s) are defined
Is there a pre-existing / Scala-idiomatic / better way of accomplishing this?
def sum(x: Int, y: Int) = x + y
var x = 10
x = applyOrBypass(target=x, optValueToApply=Some(22), sum)
x = applyOrBypass(target=x, optValueToApply=None, sum)
println(x) //…
Sebastian N.
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7
votes
2 answers
define default named arguments in terms of other arguments in scala
I have a case class that stores three tied parameters. I'd like to define companion object that may build the class from any two parameters, something that looks like the sample below, that is obviously incorrect:
def test(start : Float = end -…
ayvango
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7
votes
4 answers
Dynamically adding key-arguments to method
I would like to set the default key-arguments of an instance method dynamically. For example, with
class Module(object):
def __init__(self, **kargs):
set-default-key-args-of-method(self.run, kargs) # change run arguments
def…
Juh_
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7
votes
1 answer
Named Parameters rather than positional for Spring MessageSource.getMessage()
we are using Spring MessageSource to build error messages in our app.
We populate our error messages like this
dobInvalid = The DOB supplied {0} is invalid
We want to use named parameters so we can do
dobInvalid = The DOB supplied {dob} is…
Mark Hanlon
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7
votes
3 answers
Evaluation order of named parameters
Possible Duplicate:
Are parameters evaluated in order when passed into a method?
Say I have
void foo (int x, int y)
and call it by:
foo(y: genNum(), x: genNum())
Does C# guarantee the evaluation order of x and y in this case?
Thomas Eding
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6
votes
2 answers
Mixing Out and Named Parameters in C#: Why Does Out Parameter Need to be Named As Well?
Short Version: A named argument following an out argument gives a compiler error, but I cannot find any support for this behaviour in the language specification.
Long Version:
I'm using the Enum.TryParse three parameter overload, but I would…
Richard
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6
votes
1 answer
C# Named parameters, Inheritance and overloading surprise
I was going through some presentation regarding C# 4.0 and in the end the presenter posted a quiz with the following code.
using System;
class Base {
public virtual void Foo(int x = 4, int y = 5) {
Console.WriteLine("B x:{0}, y:{1}", x,…
ferosekhanj
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6
votes
2 answers
How did they implement this syntax in the Massive Micro-ORM, multiple args parameters?
Here on this page, Scott Hanselman shows two examples from Micro-ORMs Dapper and Massive, and the Massive-example caught my interested, because I don't see how they could implement that syntax.
The example is as follows, where I'm going to break it…
Lasse V. Karlsen
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6
votes
1 answer
How to use Named Arguments in F#
Calling a Dictionary's Add() method using named arguments works in F#.
let d = Dictionary()
d.Add(key = "five", value = 5)
let d2= Dictionary()
d2.Add(key = "five", value = 5)
d2.Add(key = 5, value = 5)
In Polly's Context…
Brett Rowberry
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