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Questions tagged [identifier]

An identifier is a name that identifies either a unique object or a unique class of objects.

1353 questions
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Apostrophe in identifiers in Haskell

I found this code snipped on the internet: digits 0 = [0] digits n = digits' n [] where digits' 0 ds = ds digits' n ds = let (q,r) = quotRem n 10 in digits' q (r:ds) sumOfDigits = sum . digits Can someone quickly…
kiltek
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Does C++11 allow dollar signs in identifiers?

Are dollar-signs allowed in identifiers in C++03? covers that dollar signs in identifiers are not allowed in C++03. GCC provides it as a C extension and properly gives a diagnostic in C++03 mode. However, in C++11, int $ = 0 will compile without…
user3920237
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ElasticSearch ID constraints

For ElasticSearch document IDs, are there any character constraints or restrictions? I am really interested to know if forward slash '/' would cause any issues here? I have some news feeds which I would like to index. The problem is that the…
Gabbar
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How do I write the qualified name of a symbol in Haskell?

I've got a name clash between two different Haskell modules that want to use the same infix operator (<*>). The Haskell 98 report says that modid.varsym is permitted, but I can't get it to work. In their entirety here are Test.hs: module…
Norman Ramsey
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What is the bundle identifier of apple's default applications in iOS?

I need to know the bundle identifiers for apple applications, such as mail, contacts, safari, photos, game center, settings, calendar, iPod, App store, camera, ... After searching for quite a while I found out they may be com.apple.{somethingelse}
Jorge Aguirre
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singular or plural identifier for a dictionary?

When naming a container , what's a better coding style: source = {} #... source[record] = some_file or sources = {} #... sources[record] = some_file The plural reads more natural at creation; the singular at assignment. And it is not an idle…
max
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Is there a length limit on g++ variable names?

See title​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​
anon
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Payload bundle identifier mismatch with Xcode at validation step

I got ios app project from someone (say zzz), which has been uploaded to Apple App Store, but removed from the store later somehow (not quite sure why). I now need work on this project. First, I created an app named 'yyyyy with me' in…
Tony Xu
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Unicode subscripts and superscripts in identifiers, why does Python consider XU == Xᵘ == Xᵤ?

Python allows unicode identifiers. I defined Xᵘ = 42, expecting XU and Xᵤ to result in a NameError. But in reality, when I define Xᵘ, Python (silently?) turns Xᵘ into Xu, which strikes me as somewhat of an unpythonic thing to do. Why is this…
gerrit
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Practical application of backticks in Swift

From this document: To use a reserved word as an identifier, put a backtick (`) before and after it. I'm curious about the practical application of this. When would you actually want to name something `class`, `self`, etc.? Or, relatedly, why did…
Luke
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Loading multiple entities by id efficiently in Hibernate

So, I'm getting a number of instances of a particular entity by id: for(Integer songId:songGroup.getSongIds()) { session = HibernateUtil.getSession(); Song song = (Song) session.get(Song.class,id); processSong(song); } This generates a SQL…
Paul Taylor
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Fixed identifier for a machine (uuid.getnode)

I'm trying to find something I can use as a unique string/number for my script that is fixed in a machine and easily obtainable(cross-platform). I presume a machine would have a network card. I don't need it to be really unique, but the necessary is…
Peter Badida
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Remove first levels of identifier in array

I think this has been up before, but could'nt find any answer to it. If it's already answered please point me in the right direction with a link. I have an array that I wan't to remove the first levels of identifier. I think there is a function for…
Fredrik
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Are dollar-signs allowed in identifiers in C++03?

What does the C++ standard say about using dollar signs in identifiers, such as Hello$World? Are they legal?
Gili
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Which part of a GUID is most worth keeping?

I need to generate a unique ID and was considering Guid.NewGuid to do this, which generates something of the form: 0fe66778-c4a8-4f93-9bda-366224df6f11 This is a little long for the string-type database column that it will end up residing in, so I…
izb
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