Why would I use a constant instead of a variable?
Beyond readability, is there another gain in using a constant?
I can not tell a difference that makes me use a constant instead of a variable.
The convention for constants in Java says that a constant must be declared with uppercase letters and the words should be separated by underscore (_).
The declaration of a constant is done by the sequence of the keywords static and...
In C ++ is there any sort of optimization or caching that prevents the same mathematical operation between constants from being repeated, especially in loops , thus decreasing application performance?
For example:
for (int i=0; i<=100;...
How do I declare a constant object in JavaScript? For example:
/* meu código */
object_teste = {valor:5}
/* console navegador */
object_teste.valor=10;
console.log(object_teste.valor) // aqui ele me retorna 10 ao invés de 5
How to leave t...
In Java, constants are declared with the sequences of keywords static and final .
When we have public static final int UM = 1; "it makes sense" to call constant, since your value can not be changed.
Now, speaking of...
How to declare a constant in Ruby? In other languages I do something like:
const CONSTANTE = 1024
And CONSTANTE can not be changed at run time. But I do not think anything like it in Ruby.
In PHP, to check if a constant exists we use the defined function. As below, for the two cases of constant declaration:
const MY_TEST_1 = 'my test 1';
define('MY_TEST_2', 'my test 2');
var_dump(defined('MY_TEST_1'), defined('MY_TEST_2...
There are situations in which we have fields that represent a type of response, whether they are boolean sim and não , S and N or with multiple answers like the status of something. For example the status of a course c...
Because in PHP , some predefined constants are case-insensitive (they are not case sensitive) and some are not?
Example 1:
echo __FILE__; // index.php
echo __file__; // index.php
echo __fiLE__; // index.php
Example 2:
ec...
I set a constant in a file and would like to call it inside a method in a class.
Example:
File: Configuracao.php
<?php
define('FOO','Hello World');
require_once('Classe.php');
?>
File: Classe.php
<?php
namespace...