Reflection on the history systems

Hire Writer Delving deeper into pre-modern views of the mind-body problem I touched upon Spinoza.

Reflection on the history systems

Historical background[ edit ] The earliest computers were programmed in their native assembly languagewhich were inherently reflective, as these original architectures could be programmed by defining instructions as data and using self-modifying code.

As programming moved to compiled higher-level languages such as AlgolCoboland Fortran but also Pascal and C and many other languagesthis reflective ability largely disappeared until programming languages with reflection built into their type systems appeared.

Uses[ edit ] Reflection helps programmers make generic software libraries to display data, process different formats of data, perform serialization or deserialization of data for communication, or do bundling and unbundling of data for containers or bursts of communication.

Effective use of reflection almost always requires a plan: A design framework, encoding description, object library, a map of a database or entity relations. Reflection makes a language more suited to network-oriented code. For example, it assists languages such as Java to operate well in networks by enabling libraries for serialization, bundling and varying data formats.

Languages without reflection e.

Reflection on the History & Systems of Psychology Essay - Research Paper Example :

C have to use auxiliary compilers, e. Reflection can be used for observing and modifying program execution at runtime. A reflection-oriented program component can monitor the execution of an enclosure of code and can modify itself according to a desired goal related to that enclosure.

This is typically accomplished by dynamically assigning program code at runtime. In object-oriented programming languages such as Javareflection allows inspection of classes, interfaces, fields and methods at runtime without knowing the names of the interfaces, fields, methods at compile time.

It also allows instantiation of new objects and invocation of methods. Reflection is also a key strategy for metaprogramming. In some object-oriented programming languages, such as C and Javareflection can be used to override member accessibility rules.

Reflection on the history systems

For example, reflection makes it possible to change the value of a field marked "private" in a third-party library's class. This section does not cite any sources.

Please help improve this section by adding citations to reliable sources. Unsourced material may be challenged and removed. January Learn how and when to remove this template message A language supporting reflection provides a number of features available at runtime that would otherwise be difficult to accomplish in a lower-level language.

Some of these features are the abilities to: Discover and modify source-code constructions such as code blocks, classesmethods, protocols, etc. Convert a string matching the symbolic name of a class or function into a reference to or invocation of that class or function.

Evaluate a string as if it were a source-code statement at runtime. Create a new interpreter for the language's bytecode to give a new meaning or purpose for a programming construct.

These features can be implemented in different ways. In MOOreflection forms a natural part of everyday programming idiom.

When verbs methods are called, various variables such as verb the name of the verb being called and this the object on which the verb is called are populated to give the context of the call.

Security is typically managed by accessing the caller stack programmatically: Since callers is a list of the methods by which the current verb was eventually called, performing tests on callers [1] the command invoked by the original user allows the verb to protect itself against unauthorised use.

Compiled languages rely on their runtime system to provide information about the source code. A compiled Objective-C executable, for example, records the names of all methods in a block of the executable, providing a table to correspond these with the underlying methods or selectors for these methods compiled into the program.

In a compiled language that supports runtime creation of functions, such as Common Lispthe runtime environment must include a compiler or an interpreter. Reflection can be implemented for languages not having built-in reflection facilities by using a program transformation system to define automated source-code changes.

Examples[ edit ] The following code snippets create an instance foo of class Foo and invoke its method PrintHello. For each programming languagenormal and reflection-based call sequences are shown. C [ edit ] The following is an example in C: GetMethod "PrintHello" ; method.

Invoke foo, null ; Delphi[ edit ] This Delphi example assumes that a TFoo class has been declared in a unit called Unit1: Free; end; end; procedure WithReflection; var RttiContext: Invoke Foo, [] ; finally Foo.

Free; end; end; This is a notable example, since Delphi is an unmanaged, fully natively compiled language, unlike most other languages that support reflection. Its language architecture inherits from strongly typed Pascal, but with significant influence from Smalltalk.History is not dead subject matter to be gleaned from a textbook; it is a vital area of research, currently enjoying a great deal of activity.

One of the goals of this course is to introduce you to the numerous published and unpublished sources of historical material in History and Systems of Psychology.

Reflection on the history systems

Running head: REFLECTION ON THE HISTORY & SYSTEMS OF PSYCHOLOGY Reflection on the History & Systems of Psychology Aron Blesch University of the Rockies May 30, 1 REFLECTION ON THE HISTORY & SYSTEMS OF PSYCHOLOGY 2 Pre-modern, modern and postmodern frames of reference have all helped shape important, contemporary psychological theories and issues.

REFLECTIVE PAPER 3 History and Systems of Psychology: Upon Reflection Upon reflection, one of the major themes resonating throughout this course on the history of modern psychology has been that an understanding of the present is predicated upon knowledge of the past (Goodwin, ).

REFLECTIVE PAPER 3 History and Systems of Psychology: Upon Reflection Upon reflection, one of the major themes resonating throughout this course on the history of modern psychology has been that an understanding of the present is predicated upon knowledge of the past (Goodwin, ).

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Raquel Porter WISE History Professor Underwood 29 April Make the Effort, Take the Opportunity I have found something about myself that I want and need to change. Throughout this semester I have realized that I do not do my best in my schoolwork.

History: Reflection Paper. Raquel Porter. WISE History. Professor Underwood. 29 . Almost alone among nineteenth-century historians, Jacob Burckhardt saw the totalitarian direction that history could take. This book (first published in English in as Force and Freedom) is a guide to the study and comprehension of historical processes.5/5(2).

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