Lazarus coding style guide - coding-style

Style Guide?
Other than http://wiki.freepascal.org/Coding_style is there a style guide that represents the style followed by a notable and large body of work in Lazarus ( and/or FPC and/or Delphi) or some sort of widespread concensus.
Example
I'm looking for things that say something such as
Names of literal constants should be in all uppercase.
Names of variables should use camelCase with initial lowercase
Indent a begin on the line after an if
The above is just an example. I'm aware of well-supported conventions in languages like Java and Perl but not of a predominant convention for programs written using Lazarus or Delphi.
Purpose
My intent is
Try to adopt a common style for all the code I write
Have this style not be too much of a surprise for the majority of programmers who might one day read it.
I'm not working in a business that has established standards.

As a good detailed style guide I'm considering the Object Pascal Style Guide by Charles Calvert. It's for Object Pascal which the Free Pascal is a child of. In fact, most of the FPC units respect the rules mentioned there.
This article documents a standard style for formatting Delphi code. It is based on the conventions developed by the Delphi team.

You will probably yield the most info on this subject with the search term "delphi coding conventions" or something. These are very loose standards that are not enforced but can be very helpful to keep your code readable. Delphi and Lazarus are very interchangeable. Same would apply with Delphi as Lazarus in this regard. Much more info on Delphi.Old Delphi books are a great resource even.

Related

Handling comments in code when doing i18n

I'm in the process of translating a Open Source project from Chinese to English, and I've used i18n (in this case babel) to separate the code from both English and Chinese translations.
Everything's done, except for a rather large number of inline comments in the code.
Obviously, babel can't translate comments inline (and it would be rather obnoxious if it did, anyway. Since code would not be unique across languages and therefore less easily verifiable.)
The way I see it, there are a number of options:
Leave comments in -
Pro: Helps original author, etc.
Con: Makes it distracting for ongoing translation and anyone who doesn't speak the language
Strip out all the comments -
Pro: Code is native-language-agnostic, so it makes sense. Who needs comments anyway? Use the source, Luke!
Con: Goes against SE principles. Could lose something important in understanding how the code works - maybe something's been done to avoid a security risk, etc.
Place English comments near Chinese comments
(Possibly moved to lines above and prefixed with "EN" and "ZH", for example).
Pro: Best of both worlds, comments kept close to code
Con: Not conducive to dictionary-style translation. Can get bulky with more languages.
Create a comment dictionary / notes
Pro: Keeps the comments in a separate file for easy translation.
Con: Difficult to keep synced with code. Not intuitive to remember to update comments related to code when changing coe.
Use a different preprocessor for i18n before/after each development cycle.
Pro: Comments et al would be in your language. Could link this to git pull/push so you only ever see the code in your language.
Con: Bulky, non-obvious process. Could result in code-verification or even compilation errors.
None of these seem like really great solutions.
If you do alot of this, and the code is shared publicly between developers who don't share a native tongue, is there a recommended way to handle translating (or not) comments in the code itself?
I am not sure I understand... You say you separated the code from the languages part. So now you should have code (with comments) + English resources + Chinese resources (i used resources for whatever your programming language use to store localizable content)
Translators only see the resources, not the code, nor the comments. The comments stay untranslated, for the developers.
Short Answer
It seems to be a mixture of:
Strip out all the comments, and
Place English comments near Chinese comments.
Inline comments are almost always trivial - Strip them
Functional comments are not as intrusive - Translate them (possibly with a i18n prefix e.g. "[cn]:" or "[en]:").
Explanation
My meagre amount of research tends to suggest that larger projects make strong attempts to reduce comments and let the code explain itself, instead focusing on code quality which reduces the need for comments.
e.g. From the Linux Kernel Coding guidelines:
NEVER try to explain HOW your code works in a comment: it's much
better to write the code so that the working is obvious, and it's
a waste of time to explain badly written code.
...and from the MySQL coding standards:
Comment your code when you do something that someone else may think is
not trivial.
Both of these standards (and others) recommend minimal function descriptions also, so that's not as obtrusive to understanding the code, and, since function descriptions are generally multi-lined and above the code itself, multiple languages can be included as necessary.
Maybe someone, somewhere has built an interface that can isolate comments into the readers language, but I couldn't (yet) find any that do so.
I always think that API comments exported in the project and private comments in open source projects should be internationalized, which is very convenient for developers in other countries.
On Github, there are actually many developers who use their own national language to comment on some well-known open source projects and some of their own annotations. Most of the reason is that if they do not translate, the efficiency of developers reading comments very low.
Similar to .d.ts in TypeScript, I think function annotation translation can also take a similar form, which is more convenient for the community to feedback translation content, because in fact many developers are willing to do so.

Coldfusion coding standards documents

I used to have a nice set of coding standards I could print for coldfusion that was almost a framework but much looser with some code examples. Like teh use of createObject, more cfscript, error and message integration, Application.cfc usage and examples. Also seperation of buisness (actions) and display using cfincludes to make an index.cfm page 'a generator' of many actions leveraginf cfswitch/cfcase...etc. I am looking for some doucmentation or anything that I can print our and sit on my desk and refer to so my coding stays clean. Any help from the community would be very much appreciated.
Although rather dated, You may find what you are looking for among the many posts listed under the "Coding Guidelines" section on the "Articles" page of the MDCFUG - Mayryland ColdFusion User's Group website.
Here are some other options:
Univ. of Maryland ColdFusion Programming Standards
Sample Applications Methodology Guidelines provided by Adobe.com
SBA ColdFusion Programming Standards contains 126 pages of coding standard written for the U.S. Small Business Administration to insure security, promote code re-use, easy readability, and easy maintenance.
Oregon Health & Science University - Coding Guidelines which contains a number of GOOD versus BAD coding examples.
I'm unaware of any "official" Coldfusion specific coding standards. Where I work we collectively came up with our own based on many years of experience working with the language. A simple one for example is to use camel case. From what I've seen camelCase is preferred over snake case in Coldfusion, so as a rule we have:
In general, for files use lowerCamelCase starting with a lower-case letter, except for CFCs which should start with an upper-case letter as they represent a class in ColdFusion.
We have other standards broken up under headings such as:
Variable Naming
Operators
Scopes
Functions
ColdFusion Native
Functions
Indentation
......
I am looking for some doucmentation or anything that I can print our
and sit on my desk and refer to so my coding stays clean.
In addition to this I recommend you create a set of generic code snippets, such as you can use in Eclipse, that conform to any standard you decide to go with. These can then be easily distributed among team members, helping to keep things consistent as well as saving typing time.
I realise this is quite an old post now, but thought it would be worth mentioning http://wiki.coldbox.org/wiki/DevelopmentBestPractices.cfm. I think this is a good set of standards for writing CFML.

Scheme core language specification

I am learning my way around Scheme, and I am especially interested in how the language is constructed. I'm trying to find a nice description of the core syntax for a Scheme implementation. I don't know enough about the standards, but I assume that they all contain macro systems. If not, I'd like to read about a standard that also includes macros (they can't possibly be implemented in simpler Scheme constructs, can they?).
Does anyone have a good reference for the minimal syntax needed for a Scheme dialect?
Just an update:
I also stumbled upon this: http://matt.might.net/articles/compiling-to-java/#sec1. If you also add define-syntax and delay then it seems like it might be a good start.
In the R5RS specification, the following page appears to be what I was looking for: formal syntax
Although it may be a bit dry, you should read over the R5RS spec or the R6RS spec.
The docs really do not take that long to read through and you can just skim most of the sections until you need more detail. But either document does cover all of the minimal syntax required, including macros.

Code "internationalization"

I worked on different projects in different countries and remarked that sometimes the code became internationalized, like
SetLargeurEtHauteur() (for SetWidthAndHeight, fr)
Dim _ListaDeObiecte as List(Of Object) (for _ObjectList, ro)
internal void SohranenieUserov() (for SaveUsers, ru)
etc.
It happens that in countries with Latin alphabet this mix is more pronounced, because there is no need of transliteration.
More than that, often the programming "jargon" is inspired by the project specifications language. There are cases that terms in "project language" have a meaning that is not "translatable" in English.
There are also projects on which works only, say a French team, uses French words (say, Personne, Vehicule, Projet etc).
In that cases I personally add in specifications a "Dictionary" that explains all business object names and only these objects are used in other (French) language.
Say:
Collectif - ensemble des Personnes;
All the actions(Get, Set, Update, Modify, Load, etc) are in English.
Now that "strong" names could be used in code:
AddPersonneToCollectif.
What is your approach to "internationalization"?
PS.
I was amused that VisualStudio compiles and runs projects in .NET with buttons named à la "btnAddÉlève" or "кпкСтоп"...
My personal approach, which is shared by many but not all in the programming community, is that source code should be in English and, if possible, all the development tools should be in English too.
The most important reason for this is being able to share your problems and solutions with the world (like we are doing now in StackOverflow, no less) without having to translate class names, error messages, paths and other artifacts every time.
It also helps consistency, because most libraries are written in English and having element names that mix two languages doesn't really help anyone, besides being a constant focus of internal conflicts when a verb like Add isn't always traslated.
English code also makes it easier to add foreign people to a project without worrying about comprehension and misunderstandings (especially between closely related languages, like Spanish and Portuguese, which have lots of false cognates)
A good link on this subject: http://www.codinghorror.com/blog/2009/03/the-ugly-american-programmer.html
(In case anyone wonders, I'm south-american and English is not my primary language)
Even if everyone on the team is a good English speaker (which is not a given), they may not necessarily know the English equivalent of all the business terminology.
I think it's a project-specific decision what to allow, but I would generally tolerate and in some cases encourage business terms (e.g. entity names) in the local language, but not technical terms (i.e. not Largeur/Hauteur instead of Width/Height).
For example in the financial world in France, everyone knows what is meant by OPCVM and FCP - if you attempt English translations you might end up with more misunderstandings than you do by allowing mixed languages.
I have the same issue with Norwegian currently. I guess it depends on your position in the project, the available time and the role of the software.
In my case, I have decided to keep all terms in an existing protocol and library I am working with in Norwegian, as I can reasonably expect that generations of administrative workers have gotten used to these, and since the library depends on the protocol. In a library wrapper for an international project, I have translated each method name literally, and added an English language documentation of the method.
Comments and documentation on the code are in English.
If designing a software from scratch, I would try to find English terms for all method names and even business terms (if reasonable. I can hardly think of an example where no term can be found though.), to keep it "portable".
If you're writing code that you may be used internationally one day, write it in English. In doubt, write it in English, even comments if you can (although I suppose you can add a few comments in the language of your workplace).
It's not specific to coding unfortunately. English isn't my native language, but I've been able to read a number of technical papers and participate to international conferences with people from all over the world. These collaborations simply wouldn't work if everyone published in their respective native languages.
It may be sad if you feel like defending your language at all cost, but you have to be realistic about it. I suppose English has the advantage to be relatively simple for achieving a basic level: no genders for names, no conjugations, no cases.
Generally code referring to language concepts should be in the same mother language as the programming language (i.e. English - for, while, string are all English words).
It's OK (but not great) to have variables and domain concepts in a local language, but you definitely don't want to be translating List, Object, Decimal, etc. into terms which cause programmers more work in reconciling two languages. Even still, I would strongly lobby to restrict very common domain concepts like Collection, Membership, Person, User and possibly less common domain concepts like Invoice, Receipt to English where this is possible.
It would be like coding half your classes in VB and half in C# - your brain has to make a cognitive shift. While this is good for hybrid apps (JavaScript on the web and C# on the backend) because it helps you keep what's running where clear, it isn't good for a general programming.
In addition, using English for everything makes the domain and language words work together better.
There are always exceptions. There are certain cases where you would use a native word anyway - where the word describes the domain best. For instance, in our (English) code base, we had references to Mexican Spanish terms for certain concepts which were only relevant for people running our software in Mexico. Typically, Japanese terms were spelled out phonetically/Romaji, though - it was difficult for non-Japanese to be able to pronounce the pictograms ;-).
I think I'd call a code base like that "abysmal" rather than "internationalized", but the general rule I've always heard is that if you ever think that someone other than one who speaks your language might ever touch the code, do it in english.
I think that good design guideline is to write code with use of English names and with english comments only (of course if your team is capable to do this, but in case of international team English seems to be natural choose, since it's a most popular language, expecially in IT world).
Good explanation of such guidline is that keywords in most of programming languages are taken from English so writing your code using English names gives more consistent look and thanks to this you end with code that is easier to read.
Another reason is that most of compilers can handle only ascii characters as names of classes, methods, etc. so probably you will end with some strange names when you decide to use some language with alphabet containing non ascii chars.
Third reason that came to my mind is sharing your code on site like SO. Today I opened a post with a piece of code where classes had Spanish names. It was hard for me to guess what was the purpose of this class (even if sometimes is not necessary it is good when you read code and understand all used words:)).
To sum up I think that internationalization of code is not a good idea. You can imagine that keywords in programming languages (e.g. class, try, while) could also be localized and probably you can imagine also how hard life could be then...
To keep things consistent, I would make the code the same (human) language as the (programming) language. That is, if the programming language uses English keywords (like for, switch, public, etc) then keep the rest of the code in English. If you are using a compiler that recognizes (say) the Swahili translations of keywords, then keep the rest of the code in Swahili.
Many APIs have standardized naming schemes that are followed regardless of (human) language, and the accompanying documentation is translated as needed (instead of the source code).
No matter what (human) language you choose, pick one and stick with it. I'd much rather try to wade through source code in German than code that was a mix of German and English.

Migrating from one C language to another, change Style?

I find myself in conflict, regarding which code style I should follow when using a different C language.
Currently I am doing work (different projects) in C++, C# and Objective-C
I noticed there is a lot of discrepancy in the conventions basic frameworks follow. Generally, I don't think it's a bad idea to adhere to these conventions, as it makes code feel more "integrated" into the environment. However it is hard for me to remember all the differences and apply principles correctly.
In C# for example, all methods of a class start Uppercase, while Objective-C seems to prefer camelCase style methods.
What tactic would you choose:
One style to rule them all (as far as applicable)
Stick with what is common in the given environment
I do especially like the google styleguides, which seem to recommend the latter. However I disagree with them on using spaces instead of tabs and their indentation in general (e.g. methods on same level as class etc.)
I think you should stick to the "accepted" styles for each language. My rationale for that is that I think it would be much easier to recall what environment you're in when you have to think in the style used for that language. It will also be much easier for someone who is familiar with that environment to look at your code and feel more comfortable with the style and formatting (i.e. less chance for them to misunderstand what they're looking at).
My rule with porting code is: Don't touch it unless you have to.
My rule with modifying old code is: Use the style of the file.
Outside of those two situations, things like coding standards and perhaps your own opinion on good style can come into play.

Resources