Companies recruiting..

[Singleton]

Hello,
I am looking for contract job with in C, C++, Java & Unix . Can someone suggest me any companies recruiting C++, Java Profs?
Or any good agencies?

Thanks in advance

[The Late, Great JC]

Hello,
I am looking for contract job with in C, C++, Java & Unix . Can someone suggest me any companies recruiting C++, Java Profs?
Or any good agencies?

Thanks in advance

Not sure you're good enough.

What's a singleton and give us a real world example of its use.

[DimPrawn]

With those skills I'd recommend learning .NET. Quick.

HTH

DP

[Singleton]

With those skills I'd recommend learning .NET. Quick.

HTH

DP

Thanks DP, I am learning C# and .NET on my own but every one is asking Commercial exp..

[The Late, Great JC]

Thanks DP, I am learning C# and .NET on my own but every one is asking Commercial exp..

What's a singleton and give us a real world example of its use.

[Xenophon]

What's a singleton and give us a real world example of its use.

singleton

1) In object-oriented programming, a singleton class is a class that can have only one object (an instance of the class) at a time. For example, using Visual C++, the "Application" class is an example of a singleton class. You can only create only one object of an Application class.
2) In set theory (mathematics), a singleton is a set with a single element. An example is the set S of all integers that are neither positive nor negative. In this case:

S = {0}

3) In certain card games, a singleton is a card that is the only one of a suit in a hand. In the game of bridge, each player is dealt 13 cards and any hand with only one card in a given suit is said to hold a singleton of that suit (which, depending on the play of the cards may turn out to be a strength or a weakness, or make no difference.)

A real world example is a bloke who can't get a girl...

[DimPrawn]

Give the lad a chance.

Well off the top of my head and without looking it up on the web I'd say a singleton is a set with exactly one element. For example, the set {0} is a singleton. Note that a set such as {{1,2,3}} is also a singleton: the only element is a set (which itself is however not a singleton).

A set is a singleton if and only if its cardinality is 1. In the set-theoretic construction of the natural numbers, the number 1 is defined as the singleton {0}.

In axiomatic set theory, the existence of singletons is a consequence of the axiom of empty set and the axiom of pairing: the former yields the empty set {}, and the latter, applied to the pairing of {} and {}, yields the singleton {{}}.

If A is any set and S is any singleton, then there exists precisely one function from A to S, the function sending every element of A to the one element of S.

Structures built on singletons often serve as terminal objects or zero objects of various categories:

The statement above shows that the singleton sets are precisely the terminal objects in the category Set of sets. No other sets are terminal.
Any singleton can be turned into a topological space in just one way (all subsets are open). These singleton topological spaces are terminal objects in the category of topological spaces and continuous functions. No other spaces are terminal in that category.
Any singleton can be turned into a group in just one way (the unique element serving as identity element). These singleton groups are zero objects in the category of groups and group homomorphisms. No other groups are terminal in that category.

In maths anyway.

In .NET a singleton is a blue blob what you drag with your mouse onto a green square whilst billing at £500/day.

[Lucifer Box]

I thought all C++ and Java was being done in India these days? I think you need to concentrate on upskilling, Singleton. Start cramming in C# and then look to blag it.

[The Lone Gunman]

AtW or Benes......... sorry, thought you said simpleton.

[WageSlave]

Well off the top of my head and without looking it up on the web I'd say a singleton is a set with exactly one element. For example, the set {0} is a singleton. Note that a set such as {{1,2,3}} is also a singleton: the only element is a set (which itself is however not a singleton).

A set is a singleton if and only if its cardinality is 1. In the set-theoretic construction of the natural numbers, the number 1 is defined as the singleton {0}.

In axiomatic set theory, the existence of singletons is a consequence of the axiom of empty set and the axiom of pairing: the former yields the empty set {}, and the latter, applied to the pairing of {} and {}, yields the singleton {{}}.

If A is any set and S is any singleton, then there exists precisely one function from A to S, the function sending every element of A to the one element of S.

Structures built on singletons often serve as terminal objects or zero objects of various categories:

The statement above shows that the singleton sets are precisely the terminal objects in the category Set of sets. No other sets are terminal.
Any singleton can be turned into a topological space in just one way (all subsets are open). These singleton topological spaces are terminal objects in the category of topological spaces and continuous functions. No other spaces are terminal in that category.
Any singleton can be turned into a group in just one way (the unique element serving as identity element). These singleton groups are zero objects in the category of groups and group homomorphisms. No other groups are terminal in that category.

In maths anyway.

Errr...DP....you're not a bald Yank with a taste for baggy jeans who teaches set theory at university, are you? If you are....

THERE WAS NOTHING WRONG WITH THAT ASSIGNMENT YOU BASTARD

Sorry, had to get that one off my chest.