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Topic: Dynamic typing



  
 Datatype - Encyclopedia.WorldSearch
For example, a datatype is a type of a value, a class is a type of an object and a kind is a type of a type.
The implementation of a dynamically typed language will catch errors related to the misuse of values - "type errors" - at the time the erroneous statement or expression is computed.
Types are usually associated either with values in memory or with objects such as variables.
http://encyclopedia.worldsearch.com/datatype.htm   (2291 words)

  
 ActiveState - Company Information, News Room, Whitepapers, ActiveState Dynamic Languages - Dynamic Tools for Dynamic ...
Dynamic languages were created to address computing needs that mainstream languages ignored or couldn't address effectively due to their design limitations.
Dynamic languages were designed to solve the technical problems faced by their inventors, not to address specific goals identified as part of a 'strategic plan' to influence buyers of IT solutions.
Given this environment, it is not surprising to learn that dynamic languages are routinely used as part of a holistic approach to scientific computation, in which computational scientists build flexible systems that are then easily scripted by domain experts.
http://www.activestate.com/Company/NewsRoom/whitepapers_ADL.plex   (8863 words)

  
 Dynamic typing in OCaml Lambda the Ultimate
Dynamic type errors, on the other hand, are by definition programming errors.
Many type errors are not errors, but actually requried in programs which require a higher degree of flexibility.
The claim that static type systems help to reduce program errors, i.e., that there is a useful relationship between type errors and program errors, needs convincing evidence (not just data points).
http://lambda-the-ultimate.org/node/view/983   (5146 words)

  
 Why dynamic typing?
Dynamic OO languages have benefits that cause (well designed applications) to scale extremely well in size and space because they allow components to be reused and pieced together in a more optimal way, and so reduce overall system complexity.
The one aspect I do consider very useful with static typing for building systems is that it *forces* developers to think formally about interfaces between objects or their code breaks quickly.
Unfortunately, a dynamically simple concept like "augmentations"[1] is also impossible to correctly represent in the core UML because of its simplistic (C++ ish) static-typing origin.
http://www.chimu.com/publications/short/whyDynamicTyping.html   (4333 words)

  
 Bruce Eckel's MindView, Inc: 11-16-04 Static vs. Dynamic
In this regard, their typing system is far safer than a language where dynamic checks are required (Java) or where users can coerce the type system into errors (C/C++).
There is an illusion that static type checking can solve all of your problems, followed by the conclusion that more static type checking is always better.
For example, many of the features of the Nice language are very appealing to me, and in general it seems to be designed to do work for you while staying out of your way.
http://mindview.net/WebLog/log-0066   (3108 words)

  
 Typing in TutorGig Discussion Groups
I couldn't type any simple word in correct order without doing it 3 or 4 times.
can do that in [fill-in name of defunct research project language here]." Dynamic typing is a one-shot...--including me--is going to say that static typing is useless, but I'd say that it tends to distract many great minds from more important problems.
That's like asking an ML user if they think static typing or pattern matching is a good thing.
http://groups.tutorgig.com/s/Typing   (964 words)

  
 Python & Java: Side by Side Comparison
In a dynamically typed language, every variable name is (unless it is null) bound only to an object.
Names are bound to objects at execution time by means of assignment statements, and it is possible to bind a name to objects of different types during the execution of the program.
strong typing versus weak typing — in programming languages.
http://www.ferg.org/projects/python_java_side-by-side.html   (2634 words)

  
 Bruce Eckel's MindView, Inc: 3-11-04 About Latent Typing
Latent typing simply takes this one step further, and makes that interface latent so you don't have to express the interface, or to implement it in every class that you want to use in the function.
One of the great benefits of object- oriented programming is that it weakens this constraint a bit: polymorphism means that you can stick more than one type of object into a particular variable.
To see why it's no easier with or without latent typing, it's important to see the distinction between latent typing and weakening the type constraints on a function's arguments.
http://mindview.net/WebLog/log-0051   (1755 words)

  
 The Fishbowl: Weighing into the Static vs Dynamic Typing Debate
Being able to discover precisely where (or if) a type or method is referenced is invaluable.
Assigning null to a variable is far more common than assigning the wrong type entirely.
When I return to a project after that amount of time, the information that the IDE can glean from the type system is invaluable.
http://fishbowl.pastiche.org/2003/05/06/weighing_into_the_static_vs_dynamic_typing_debate   (1262 words)

  
 Sam Ruby: Dynamic Typing
Python and Perl are not the only dynamic languages in the world.
http://www.intertwingly.net/blog/1391.html   (829 words)

  
 MF Bliki: DynamicTyping
Another area where static typing is useful is that it allows programming environments to be much more helpful.
Despite this, there's still something particularly satisfying about programming in languages like Smalltalk and Ruby - and I think it has a great deal to do with the dynamic typing.
Somehow things just seem to flow better when you're programming in that environment, even when I'm doing my Ruby in emacs instead of IntelliJ.
http://martinfowler.com/bliki/DynamicTyping.html   (636 words)

  
 Dynamic Typing in a Statically Typed Language - Abadi, Cardelli, Pierce, Plotkin (ResearchIndex)
Abstract: Statically typed programming languages allow earlier error checking, better enforcement of disciplined programming styles, and generation of more efficient object code than languages where all type consistency checks are performed at run time.
84 Operational Semantics and Polymorphic Type Inference (context) - Tofte - 1988
19: A theory of type polymorphism in programming (context) - Milner - 1978
http://citeseer.ist.psu.edu/abadi89dynamic.html   (709 words)

  
 Lisp programming language at opensource encyclopedia
Its prominent features include prefix-notation syntax, dynamic typing (variables are type-neutral, but values have implicit type), and the ability to treat source code as first-class objects.
Not counting the various machine languages and assembly languages, Lisp is the second-oldest programming language still in widespread use; only Fortran is older.
Lisp (which stands for "LISt Processing") is a programming language oriented towards functional programming.
http://wiki.tatet.com/Lisp_programming_language.html   (2155 words)

  
 Typing, typing tutor, typing skill test
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http://watcheducation.com/typing.html   (1075 words)

  
 On Java Generics and Dynamic Typing [ ZefHemel.com ]
Now when I find something coded in the libraries, I’ll have to question whether this is the good way to do it, or if it was just expedience.
Of course, there’s another boundary the language system can only know so much, and at some point you have to start writing your own tests, that know the specifics of your particular program.
Always choosing the static checking approach as the only viable option will ultimately produce a programming system that is intractable.
http://www.zefhemel.com/archives/2004/10/06/on-java-generics-and-dynamic-typing   (1047 words)

  
 dynamic typing : Java Glossary
Occasionally (in some research languages) dynamic typing means the identity of 'which type is some object' is computed as a user-defined predicate upon its run-time varying data, and is not an invariant of its creation.
There, the identity of the specific subroutine is computed at runtime with a combination of the run-time-varying specific type, plus the statically known method call name.
Imagine this: in a dynamically typed language, you could pop off three stacks: object reference, message reference, arguments, mix them, and call the result.
http://mindprod.com/jgloss/dynamictyping.html   (218 words)

  
 Typing Dynamic Typing
Even when programming in a statically typed language we every now and then encounter statically untypable values; such values result from interpreting values or from communicating with the outside world.
We show how, by a careful use of existentially and universally quantified types, one may achieve the same effect, without extending the language with new or unsafe features.
To cope with this problem most languages include some form of dynamic types.
http://www.cs.uu.nl/people/arthurb/dynamic.html   (192 words)

  
 Re: OT: Static/dynamic typing
Since maintenance lasts longer than initial > development this would seem like a clear win for static type-checking > except that it can often bloat and complicate the code and thus provide > more opportunities for bugs to creep in.
Compilers dealing with static types (whether or not they're safe) can do all sorts of pedal-to-the-metal tricks that are not available in a dynamically typed environment.
Paul Prescod wrote: > When I am creating new code, dynamic type checking almost always allows > me to be more productive than static type checking.
http://www.stylusstudio.com/xmldev/200205/post40710.html   (234 words)

  
 Dynamic typing is evil
Later on I wrote a big app in Java, but every time I wanted to distribute it, I had to ask people to mess about with interpreters and libraries.
I really dislike the dynamic typing in PHP - at least with strongly typed java you know what to expect from a variable.
Once upon a time I tried the "rescue" option of my Red Hat install CD, only to have Anaconda installer script barf on me with a Python traceback saying that the object "_" didn't have a toString method (or something to that effect).
http://www.oreillynet.com/cs/user/view/cs_msg/18554?page=last&x-order=date   (274 words)

  
 Static vs. Dynamic Typing
I chose Perl because it was the dynamic language that Java programmers are most likely to be familiar with.
But I want to see a single language with different levels of typing.
I'm sure there are languages with better typing than Java and Perl.
http://weblogs.java.net/cs/user/view/cs_msg/675   (102 words)

  
 Objective C Computer Encyclopedia Enterprise Resource Directory Complete Guide to Internet
Objective C can also be used as an extension to {C++}, which lacks some of the possibilities for {object-oriented design} that {dynamic typing} and {dynamic binding} bring to Objective C. C++ also has features not found in Objective C. Versions exist for {MS-DOS}, {Macintosh}, {VAX}/{VMS} and {Unix} {workstation}s.
http://www.jaysir.com/computer-encyclopedia/o/objective-c-computer-terms.htm   (207 words)

  
 Secure Internet Programming: The Security of Static Typing with Dynamic Linking
Static typing and dynamic linking interact in a security-relevant way.
Dynamic linking is a requirement for portable executable content.
Executable content cannot know, ahead of time, where it is going to be executed, nor know the proper operating system interface.
http://www.cs.princeton.edu/sip/pub/ccs4.html   (109 words)

  
 Dynamic Drive- Typing Text Script
The majority of scripts here are written by the programmers right here at Dynamic Drive, and cannot be found anywhere else on the net.
All other browsers will simply see the text fully displayed from the start.
http://www.dynamicdrive.com/dynamicindex10/text5.htm   (241 words)

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