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Topic: Nullary


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In the News (Thu 31 Dec 09)

  
  Re: Slurpy nullary vs nonslurpy nullary - nntp.perl.org
Re: Slurpy nullary vs nonslurpy nullary - nntp.perl.org
Slurpy nullary vs nonslurpy nullary by Autrijus Tang
Re: Slurpy nullary vs nonslurpy nullary by Damian Conway
www.nntp.perl.org /group/perl.perl6.language/2005/02/msg19282.html   (573 words)

  
 Empty product - Wikipedia, the free encyclopedia
In mathematics, an empty product, or nullary product, is the result of multiplying no numbers.
Its numerical value is 1 (the multiplicative identity), just as the empty sum — the sum of no numbers — is zero (the additive identity).
Dually, in any category, the coproduct of any empty family is (up to isomorphism) the initial object of that category.
en.wikipedia.org /wiki/Empty_product   (1032 words)

  
 Empty set - Open Encyclopedia   (Site not responding. Last check: 2007-11-04)
This is known as "preservation of nullary unions."
Operations performed on the empty set (as a set of things to be operated upon) can also be confusing.
(Such operations are nullary operations.) For example, the sum of the elements of the empty set is zero, but the product of the elements of the empty set is one (see empty product).
open-encyclopedia.com /Empty_set   (1199 words)

  
 dBforums - cardinality of 1
The 'nullary key' is a key on an empty set of columns.
is not (zero or) one, then the 'nullary key' is not the answer.
> not (zero or) one, then the 'nullary key' is not the answer.
www.dbforums.com /printthread.php?t=1066918   (926 words)

  
 Re: nullary function syntax   (Site not responding. Last check: 2007-11-04)
For example, is > the phrase > > <* (x :: T1) :: T2 *> > > a nullary function value (read as "x contained in T1, and the result > contained in T2"), or a function type signature (read as "the type of > functions that map from T1 to T2").
For > a nullary function, the signature includes an empty parameter list and > the return type.
There is really little use for nullary functions in everyday specification.
www.ittc.ku.edu /~majord/rosetta/200110/msg00019.html   (265 words)

  
 nullary FFI's   (Site not responding. Last check: 2007-11-04)
I tried rigging prim.fun to get nullary FFI's to be considered functional, but that didn't get rid of them.
Anyways, this came up because my translation from MachineIL was assuming that all FFI prims that were nullary had a destination.
It's easy enough to generate nothing for the case of a nullary FFI with no destination, but I would think that some simplifier further back could also take care of it.
mlton.org /pipermail/mlton/2000-September/017833.html   (177 words)

  
 Re: nullary function syntax   (Site not responding. Last check: 2007-11-04)
OK, I know I'm late into this (things have been unsettled here --- big difference, I know), but: Peter Ashenden writes: In the Usage Guide, there are several uses of nullary functions, eg, <* 3+2 *> == 5 I guess the general form is intended to be <* expression *>.
For example, is the phrase <* (x :: T1) :: T2 *> a nullary function value (read as "x contained in T1, and the result contained in T2"), or a function type signature (read as "the type of functions that map from T1 to T2").
For a nullary function, the signature includes an empty parameter list and the return type.
www.ittc.ku.edu /~majord/rosetta/200110/msg00024.html   (279 words)

  
 Java Beans - How to provide a reasonable default without a no-parameter-constructor?
nullary constructor a MUST for a JavaBean to be a JavaBean?
In some sense, a nullary constructor _must_ be sufficient.
be initialized by invocation of a nullary constructor (and no other).
www.codecomments.com /archive246-2005-1-375186.html   (326 words)

  
 Bug ID: 4462359 Two problems in java.lang.Class.newInstance() spec
The spec does not define what exception should be thrown if the class is abstract and has protected nullary constructor.
On the one hand due to the line "Throws: IllegalAccessException - if the class or its nullary constructor is not accessible." IllegalAccessException should be thrown, because constructor Formatter() is protected.
Java HotSpot Server VM (build 1.4.0-beta-b65) throws InstantiationException in all modes in all platforms for the class java.util.logging.Formatter, but Client VM throws IllegalAccessException in all modes and in all platforms for the same class.
bugs.sun.com /bugdatabase/view_bug.do?bug_id=4462359   (657 words)

  
 Learn more about Universal algebra in the online encyclopedia.   (Site not responding. Last check: 2007-11-04)
Thus, a 0-ary operation (or nullary operation) is simply an element of
The reason is that the axioms of identity and inverse are not stated purely in terms of equational laws but also have clauses involving the phrase "there exists...
The solution is not difficult; we add a nullary operation
www.onlineencyclopedia.org /u/un/universal_algebra.html   (757 words)

  
 Slurpy nullary vs nonslurpy nullary
The real problem is the multisub dispatcher initially complained about the () signature, saying that it is "non-slurpy" and may not take a list, even though the list eventually flattens into an empty list; so I modified the definition to make () explicitly slurpy.
Re: Slurpy nullary vs nonslurpy nullary Autrijus Tang
Re: Slurpy nullary vs nonslurpy nullary Damian Conway
www.mail-archive.com /perl6-all@perl.org/msg45503.html   (224 words)

  
 [No title]
Similarly, we have a notion of the nullary intersection, that is the intersection of zero sets (meaning no sets, not null sets).
Without a universe, the nullary intersection would be the set of absolutely everything, which is generally regarded as impossible; but with the universe in mind, we can treat the nullary intersection as the set of everything under consideration, which is simply U.
Then De Morgan's laws, which deal with complements of meets and joins (which are unions in set theory) apply, and apply even to the nullary meet and the nullary join (which is the empty set).
www.homestayfinder.com /Dictionary.aspx?q=universe_(mathematics)   (1751 words)

  
 NUL from FOLDOC
Nearby terms: NUCLEOL « nude « nuke « null » nullary » null modem » null-terminated multibyte string
Nearby terms: nuke « null « nullary « null modem » null-terminated multibyte string » NUMA » number crunching
Nearby terms: null « nullary « null modem « null-terminated multibyte string » NUMA » number crunching » numbers
wombat.doc.ic.ac.uk /foldoc/foldoc.cgi/foldoc.cgi?NUL   (249 words)

  
 Oliver Steele » Blog Archive » One-Line JavaScript Memoization
is a nullary function, and there’s a trick for implementing memoization of nullary methods in a dynamic language such as JavaScript (or Python or Ruby).
A referentially transparent nullary function has the syntax of a function, but the semantics of a value.
In the special case where the function is nullary, you don’t need a map, because the empty list is the only key.
osteele.com /archives/2006/04/javascript-memoization   (2039 words)

  
 Biproduct
Note that if we take n = 0 in the above definition, then only the first condition applies, and we have for the nullary biproduct an object O such that the identity morphism on O is equal to the zero morphism from O to itself.
But biproducts do not exist in the category of all groups; indeed, this category isn't even preadditive.
In particular, a nullary biproduct is always a zero object.
www.fastload.org /bi/Biproduct.html   (269 words)

  
 nullary _prim's   (Site not responding. Last check: 2007-11-04)
After elaboration, the MLton traverses the CoreML program (see core-ml/lookup-constant.{fun,sig}) and builds a little C program to print out the values of all nullary primitives (which must be of type bool, int, or word, for now.
The upshot is that no pass after type inference needs to worry about nullary primitives.
The code dependencies are a bit weird because LookupConstant needs to call gcc with the right include files, which are determined by Main.
mlton.org /pipermail/mlton/2000-June/017579.html   (196 words)

  
 Section 2.6.  Nullary Metafunctions   (Site not responding. Last check: 2007-11-04)
From the requirements standpoint, a nullary metafunction is any type, whether it's a plain class or a class template specialization, that provides us with a nested
is a nullary metafunction that always returns the same result:
The easiest way to write a nullary metafunction is to go with a simple
www.readol.net /books/computer/cpp/C.Plus.Plus.Template.Metaprogramming/0321227255/ch02lev1sec6.html   (83 words)

  
 ► » What is a nullary function?   (Site not responding. Last check: 2007-11-04)
I was thinking that a nullary function would be something like a
Another name for a nullary function is a constant symbol.
constant value; but a nullary function *must* have a constant value.
www.science-chat.org /detail-2225794.html   (2916 words)

  
 Slurpy nullary vs nonslurpy nullary
The real problem is the multisub dispatcher initially : complained about the () signature, saying that it is "non-slurpy" : and may not take a list, even though the list eventually flattens : into an empty list; so I modified the definition to make () explicitly : slurpy.
The creation order of CODE objects is not reliable once you get out of the current module, and even within a module can be unclear to the programmer once people start flinging various compile-time blocks and evals around.
It's close to what you describe above, except the "local vs global" distinction is a little more complex, and the final discrimination is via C, not via C object creation sequence.
www.codecomments.com /message401144.html   (2280 words)

  
 Datatype Declarations
The type constructor may take zero or more arguments; a zero-argument, or nullary, type constructor is just a type.
Each value constructor may also take zero or more arguments; a nullary value constructor is just a constant.
Here's a simple example of a nullary type constructor with four nullary value constructors.
www.cs.cmu.edu /People/rwh/introsml/core/datatypes.htm   (1960 words)

  
 Class (Java 2 Platform SE 5.0)
Note that this method propagates any exception thrown by the nullary constructor, including a checked exception.
Use of this method effectively bypasses the compile-time exception checking that would otherwise be performed by the compiler.
represents an abstract class, an interface, an array class, a primitive type, or void; or if the class has no nullary constructor; or if the instantiation fails for some other reason.
java.sun.com /j2se/1.5/docs/api/java/lang/Class.html   (6130 words)

  
 Questions about sharing   (Site not responding. Last check: 2007-11-04)
Here's my > understanding of how it works (implementors should probably chime in > if my memory is faulty or out of date): >=20 > 1) There is a single, canonical copy of every nullary constructor.
>=20 > Therefore when a thunk evaluates to a nullary constructor, it is > overwritten directly.
In The Olden Days (<=3D 3.02) we used a return-in-registers policy to avoid heap-allocating return values when they were about to be used once and thrown away, and this also enabled update-in-place in certain circumstances.
haskell.org /pipermail/glasgow-haskell-users/2001-December/002723.html   (301 words)

  
 [Stratego-dev] variables and nullary constructors   (Site not responding. Last check: 2007-11-04)
Semantic analysis on one module (class) should be enough to determine the meaning of code in my opinion.
Currently you can for example write either None or None() to construct a term with an nullary constructor.
Allowing the variant without parentheses has two major disadvantages: (1) a variable might be understood as contructor although it is not intended to be a constructor.
mail.cs.uu.nl /pipermail/stratego-dev/2003q1/000166.html   (440 words)

  
 Nullary Intersection Encyclopedia Article, Definition, History, Biography   (Site not responding. Last check: 2007-11-04)
Looking For nullary intersection - Find nullary intersection and more at Lycos Search.
Find nullary intersection - Your relevant result is a click away!
Look for nullary intersection - Find nullary intersection at one of the best sites the Internet has to offer!
www.karr.net /encyclopedia/Nullary_intersection   (138 words)

  
 Nullary   (Site not responding. Last check: 2007-11-04)
Create an instruction of the Nullary instruction format.
Mutate the argument instruction into an instruction of the Nullary instruction format having the specified operator and operands.
Set the operand called Result in the argument instruction to the argument operand.
jikesrvm.sourceforge.net /api/com/ibm/JikesRVM/opt/ir/Nullary.html   (289 words)

  
 [No title]
Nullary metafunction classes are no longer special-cased, and are not identical to nullary metafunctions:
This fixes a flaw in the metafunction/metafunction class algebra that long has been the major source of other inconsistencies throughout the library.
The second form is available only on fully conforming compilers.
www.mywikinet.com /mpl/mpl_1_32_changelog/apply-lambda-semantics.html   (132 words)

  
 Questions about sharing   (Site not responding. Last check: 2007-11-04)
Here's my > understanding of how it works (implementors should probably chime in > if my memory is faulty or out of date): >=20 > 1) There is a single, canonical copy of every nullary constructor.
>=20 > Therefore when a thunk evaluates to a nullary constructor, it is > overwritten directly.
In The Olden Days (<=3D 3.02) we used a return-in-registers policy to avoid heap-allocating return values when they were about to be used once and thrown away, and this also enabled update-in-place in certain circumstances.
www.haskell.org /pipermail/glasgow-haskell-users/2001-December/002723.html   (301 words)

  
 0-ary function   (Site not responding. Last check: 2007-11-04)
See also constant function, unary function, binary function, n-ary function.
A 0-ary or nullary function that is pure (no state or interactions with external variables) must be a constant function.
Go to the Dictionary of Algorithms and Data Structures home page.
www.nist.gov /dads/HTML/zeroaryfunc.html   (88 words)

  
 Currying of Order-Sorted Term Rewriting Systems - Kawabe, Ishii (ResearchIndex)   (Site not responding. Last check: 2007-11-04)
We focus upon a transformation of term rewriting systems called currying.
Currying transforms a term rewriting system with symbols of arbitrary arity into another one, which contains only nullary symbols with a single binary symbol called application.
Currying in single-sorted case is explored in [1] but currying in typed case remains as a problem.
citeseer.lcs.mit.edu /kawabe95currying.html   (325 words)

  
 [No title]   (Site not responding. Last check: 2007-11-04)
It allows access to a list of mothers through potential daughters.
* It contains nullary, unary and binary rules.
*/ SymbolTable _categoryNames; /** nullary rules: an array of mother category/probability pairs.
www.colloquial.com /carp/Parser/Code/GrammarRules.java   (344 words)

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