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• Java enums vs constants for Strings

  - by Marcus

  I've switched from using constants for Strings: public static final String OPTION_1 = "OPTION_1"; ... to enums: public enum Options { OPTION_1; } With constants, you'd just refer to the constant: String s = TheClass.OPTION_1 But with Enums, you have to specify toString(): String s = Options.OPTION_1.toString(); I don't like…

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• When to use Constants vs. Config Files to maintain Configuration

  - by CoffeeAddict

  I often fight with myself on whether to put certain keys in my web.config or in a Constants.cs class or something like this. For example if I wanted to store application specific keys for whatever the case may be..I could store it and grab it from my web config via custom keys or consume it by referencing a constant in my constants class. …

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• taglib with constants functionality?

  - by jack

  I need to use some constants in my JSP. Now I'd like to use this without using scriptlets. (and adding getters is not an option, it's an external jar) Using the search I've seen that some people put them in a map. However I've seen that there's a constants function in the unstandard taglib but that is a few years old and so far I haven't…

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• Where to put constants in Rails

  - by Sam

  I have a few constants which are arrays that I don't want to create db's for but I don't know where to store the constants without getting errors. For example CONTAINER_SIZES = [["20 foot"],["40 foot"]] Where can I store this so all models and controller have access to this?

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• Problem with constants in application.ini after PHP upgrade

  - by Marek

  Hi, I've upgraded PHP on my local dev system to version 5.3.0, and there is some problem when I use constants in application.ini - following manual http://framework.zend.com/manual/en/learning.quickstart.create-project.html I have: bootstrap.path = APPLICATION_PATH "/Bootstrap.php" which leads to: Warning:…

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• Are there constants in Javascript?

  - by fuentesjr

  If not, what's the common practice for specifying variables that are used as constants?

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• Why doesn't CSS support constants?

  - by Adiel Mittmann

  CSS has never supported constants or variables directly. Whenever I'm writing code like this: span.class1 { color: #377fb6; } div.class2 { border: solid 1px #377fb6; /* Repeated color */ } I wonder why such a seemingly simple feature has never made it into the standard. What could be hard about…

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• sfConfig::get is not returning constants defined in app.yml

  - by morpheous

  I have an interesting problem. I am using Symfony 1.3.2. I have defined some constants in project/apps/frontend/config/app.yml and project/config/app.yml When I use the constant (correct spelling) in a piece of code like this $test=sfConfig::get('app_foobar'); the variable $test is assigned a…

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• Why use constants in programming?

  - by Adam N

  I've just been going back over a bit of C studying using Ivor Horton's Beginning C book. I got to the bit about declaring constants which seems to get mixed up with variables in the same sentence. Just to clarify, what is the difference in specifying constants and variables in C, and really, when…

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• aligning extern constants (gcc)

  - by ~buratinas

  I want to make some static constants globally visible. I'm pretty familiar how to do that in C++. The problem is that these constants need to be aligned to some exotic boundary. Do I have to specify the alignment in extern declaration? I'm using GCC4.5 in *.cpp file static const constant_t…

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• how does [<Literal>] differ from other constants in F#

  - by Mitzh

  I am a bit confused by the Literal keyword and why it is necessary in F#. Reading the docs, it sounds to me that [<Literal>] is used to define a constant, however I am a bit confused how this constant differs from all other constants in F#.. Values that are intended to be…

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• Can I use string concatenation to define a class CONST in PHP?

  - by selfsimilar

  I know that you can create global constants in terms of each other using string concatenation: define('FOO', 'foo'); define('BAR', FOO.'bar'); echo BAR; will print 'foobar'. However, I'm getting an error trying to do the same using class constants. class foobar { const foo…

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• What is the difference between AF_INET and PF_INET constants?

  - by Denilson Sá

  Looking at examples about socket programming, we can see that some people use AF_INET while others use PF_INET. In addition, sometimes both of them are used at the same example. The question is: Is there any difference between them? Which one should we use? If you can answer that,…

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• Java: refactoring static constants

  - by akf

  We are in the process of refactoring some code. There is a feature that we have developed in one project that we would like to now use in other projects. We are extracting the foundation of this feature and making it a full-fledged project which can then be imported by its…

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• Is it a bad practice to have an interface to define constants?

  - by FabianB

  I am writing a set of junit test classes in java. There are several constants, for example strings that I will need in different test classes. I am thinking about an interface that defines them and every test class would implement it. The benefits I see there are: easy…

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• Why Constant Keyword is not introduced In Java?

  - by harigm

  I am curious learner of Java, I was thinking on one topic "CONSTANTS" I have learnt that Java allows us to declare constants by using "Final" keyword. My question is Java didnot introduce Constant(Const) Keyword. Since many people say it has come from C++, in C++ we have…

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• Why is there no Constant keyword in Java?

  - by harigm

  I am curious learner of Java, and I was thinking about the topic of "CONSTANTS". I have learnt that Java allows us to declare constants by using final keyword. My question is why didn't Java introduce Constant (const) keyword. Since many people say it has come from C++,…

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• How do I declare an array as a constant in Objective-c?

  - by Andrew

  The following code is giving me errors: // constants.h extern NSArray const *testArray; // constants.m NSArray const *testArray = [NSArray arrayWithObjects: @"foo", @"bar"]; The error I get is initializer element is not constant Or if I take away the pointer…

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• How to import constants in a JSP page

  - by javanix

  Are there any better ways to use constants in a JSP than: <%@ page import="static package.Interface.NAME"%> Is there any downside to using these (outside of mixing code/content)? Thanks!

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• String literals vs constants for Session[...] dictionary keys

  - by FreshCode

  Session[Constant] vs Session["String Literal"] Performance I'm retrieving user-specific data like ViewData["CartItems"] = Session["CartItems"]; with a string literal for keys on every request. Should I be using constants for this? If yes, how should I go about…

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• Serverside configuration constants in GWT

  - by Claus Jørgensen

  Hi I need some configuration files, that can be changed without recompiling the project in my GWT application. However, the GWT i18n doesn't allow to be used serverside. So what's the solution for getting configuration constants to be used serverside? Thanks.

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• C# naming convention for constants other than Pascal and All Caps

  - by Ismail S

  In my project currently we are using All caps as naming convention for constants. I would like to change it and I'm OK for me but my team lead has a strong argument that it will not visibly distinguish constant from Properties and other Types. Please help me…

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• Should I capitalize my constants?

  - by Tim Merrifield

  What do you guys think? Should constants be capitalized? Or is that an archaic practice? So... const int MY_CONSTANT = 5; vs. const int myConstant = 5;

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• Shall I prefer constants over defines?

  - by Helper Method

  In C, shall I prefer constants over defines? I've reading a lot of code lately, and all of the examples make heavy use of defines.

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• Best practice for Python & Django constants

  - by Dylan Klomparens

  I have a Django model that relies on a tuple. I'm wondering what the best practice is for refering to constants within that tuple for my Django program. Here, for example, I'd like to specify "default=0" as something that is more readable and does not require…

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