In object-oriented programming, a class constant is a constant defined within a class.
In object-oriented programming, a class constant is a constant defined within a class.
Questions tagged [class-constants]
97 questions
5
votes
2 answers
Access constants in Class without making instance of class in ObjectiveC
Below C# class is used just to keep constants.
So we can access each using class name
So 'Constants.DIR_ARCHIVE' will give 'Archive'.
How I can define below C# class in ObjectiveC?
public class Constants
{
//Resource Directory Names
public const…
Afsal Meerankutty
- 366
- 4
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4
votes
1 answer
Ruby Class method or Constant, best practice
One of my ruby classes draws data from a rather large, local, XML file that will only change with a new deploy.
Is the best practice in this case to keep the document as a constant, like:
class Product
XML_DOC =…
SooDesuNe
- 9,880
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4
votes
0 answers
Class constants in PHP strings: arrays yes, scalars not really
I was wondering if there was some way to interpolate class constants in strings without storing them in other variables first. Consider the following code:
class Foo {
const BAR = 'baz';
}
$foo = new Foo(); // or $foo = 'Foo';
echo…
CJ Dennis
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4
votes
1 answer
Performance of MATLAB's class constants
I have several helper functions in my code which get called many times for a given numerical calculation. Those helper functions use some constant values for their calculations. The same constant value might be used by more than one helper…
FernAndr
- 1,448
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4
votes
1 answer
Python class constant using class init method?
I've made a class which can be compared and sorted inside common data structures.
The thing is that I wanted to make two class constants for the maximum and minimum values that class can take. So I could call this value just importing MyClass and…
madtyn
- 1,469
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4
votes
1 answer
Code style defining multiple constants in PHP
Is there any significant difference in how I define multiple constants in PHP class between:
this:
DeadMoroz
- 270
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4
votes
2 answers
create an array of all constant of a class?
I was working with a class where almost 20 constant are defined, as i want all these constant value in an array, i just want to know
is there any method which create an array of all constant of a class?
I tried with compact BUT it does not work with…
xkeshav
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3
votes
5 answers
Using class constants and overriding in PHP
If I have a class structure with a value that can either be true or false, that doesn't change, currently implemented as variables would it be better to change them to constants, such as:
class Parent {
const BOOL_CONST = false;
…
AntonChanning
- 509
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3
votes
1 answer
What is the difference between a constant member and a private member without setter?
Suppose I have a constant member and different object have different values for this constant, what is the difference between this constant member and a private member without a setter?
samnaction
- 1,194
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3
votes
1 answer
PHP: Constants & Bitwise separator as default argument to a method
Im creating a class method and want to have a default argument value that contains constants:
MQSERIES_MQGMO_FAIL_IF_QUIESCING | MQSERIES_MQGMO_WAIT, 'WaitInterval'…
Paul Wieland
- 765
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3
votes
4 answers
define constant in php
how do I define a constant inside a function
eg.
class {
public test;
function tester{
const test = "abc";
}
}
Jeremy Gwa
- 2,333
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3
votes
3 answers
Ruby "CONSTANTS" seem to be INVISIBLY ALTERABLE?
I understand that "constants" in Ruby are by convention called constants but are in fact mutable. However I was under the impression that when they were "mutated" that there was a warning:
class Z2
M = [0,1]
end
Z2::M # => [0, 1]
Z2::M =…
TJChambers
- 1,489
- 1
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- 28
3
votes
2 answers
How to implement a lookup class in Ruby?
I have a list of immutable value objects. The lookup class provides ways to iterate and query that data:
class Banker
Bank = Struct.new(:name, :bic, :codes)
attr_reader :banks
def initialize
@banks = [
Bank.new('Citibank', …
randomguy
- 12,042
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3
votes
2 answers
PHP Class constant with php function constant giving warning
I have a constants I want to return by a function like this:
public function getConst($const)
{
$const = constant("Client::{$const}");
return $const;
}
But this is giving me an error:
constant(): Couldn't find constant…
Dion Snoeijen
- 94
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- 11
3
votes
2 answers
PHP Object access with class constant
Is it possible in PHP to access a member of an object where the name of the member is specified by a class constant?
Consider this example:
class X{
const foo = "abc";
}
class Y{
public $abc;
}
$y = new Y();
$y->X::foo = 23; //This does…
gexicide
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