英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字,中文词皆可:

Smalltalk    音标拼音: [sm'ɔlt,ɔk]
The pioneering {object-oriented programming} system
developed in 1972 by the Software Concepts Group, led by {Alan
Kay}, at {Xerox PARC} between 1971 and 1983. It includes a
language, a programming environment, and an extensive object
library.

Smalltalk took the concepts of {class} and {message} from
{Simula-67} and made them all-pervasive. Innovations included
the {bitmap display}, windowing system, and use of a {mouse}.

The {syntax} is very simple. The fundamental construction is
to send a message to an {object}:

object message

or with extra parameters

object message: param1 secondArg: param2 .. nthArg: paramN

where "secondArg:" etc. are considered to be part of the
message name.

Five pseudo-variables are defined: "self", "super", "nil",
"true", "false". "self" is the receiver of the current
message. "super" is used to delegate processing of a message
to the {superclass} of the receiver. "nil" is a reference to
"nothing" (an instance of UndefinedObject). All variables
initially contain a reference to nil. "true" and "false" are
{Booleans}.

In Smalltalk, any message can be sent to any object. The
recipient object itself decides (based on the message name,
also called the "message selector") how to respond to the
message. Because of that, the {multiple inheritance} system
included in the early versions of Smalltalk-80 appeared to be
unused in practice. All modern implementations have single
inheritance, so each class can have at most one superclass.

Early implementations were {interpreted} but all modern ones
use {dynamic translation} (JIT).

Early versions were Smalltalk-72, Smalltalk-74, Smalltalk-76
(inheritance taken from Simula, and concurrency), and
Smalltalk-78, {Smalltalk-80}. Other versions include {Little
Smalltalk}, {Smalltalk/V}, {Kamin's interpreters}. Current
versions are {VisualWorks}, {Squeak}, {VisualAge}, {Dolphin
Smalltalk}, {Object Studio}, {GNU Smalltalk}.

See also: {International Smalltalk Association}.

{UIUC Smalltalk archive (http://st-www.cs.uiuc.edu/)}.
{FAQ (http://XCF.Berkeley.EDU/pub/misc/smalltalk/FAQ/)}.

{Usenet} newsgroup: {news:comp.lang.smalltalk}.

["The Smalltalk-76 Programming System Design and
Implementation", D.H. Ingalls, 5th POPL, ACM 1978, pp. 9-16].

(2001-09-11)


请选择你想看的字典辞典:
单词字典翻译
Smalltalk查看 Smalltalk 在百度字典中的解释百度英翻中〔查看〕
Smalltalk查看 Smalltalk 在Google字典中的解释Google英翻中〔查看〕
Smalltalk查看 Smalltalk 在Yahoo字典中的解释Yahoo英翻中〔查看〕





安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Yahoo Mail
    The New Yahoo Mail Smart, Clean, Powerful Connect Your Gmail Create a New Yahoo Email
  • Yahoo | Mail, Weather, Search, Politics, News, Finance, Sports Videos
    Yahoo is a comprehensive platform offering news, email, weather, politics, finance, sports, videos and search services to keep you informed and connected
  • Yahoo Mail | Email with smart features and top-notch security
    Yahoo Mail: Your smarter, faster, free email solution Organize your inbox, protect your privacy, and tackle tasks efficiently with AI-powered features and robust security tools
  • Yahoo Mail - My Yahoo
    Take a trip into an upgraded, more organized inbox with Yahoo Mail Login and start exploring all the free, organizational tools for your email Check out new themes, send GIFs, find every
  • Login - Sign in to Yahoo
    Sign in to access the best in class Yahoo Mail, breaking local, national and global news, finance, sports, music, movies You get more out of the web, you get more out of life
  • Sign up for a Yahoo account | New Yahoo Mail Help | Yahoo Help
    You're just steps away from using Yahoo Mail, Yahoo Finance, and more when you sign up for a Yahoo account Create a new account or use an existing email address from any email provider;
  • Yahoo
    News, email and search are just the beginning Discover more every day Find your yodel
  • Yahoo Mail on the App Store
    Meet the mail app designed to simplify your life The secure, fast, simple Yahoo Mail makes email effortless so you can spend more time enjoying life and less time in your inbox
  • Login - Sign in to Yahoo - Yahoo Mail
    Sign in to access the best in class Yahoo Mail, breaking local, national and global news, finance, sports, music, movies You get more out of the web, you get more out of life
  • Help for New Yahoo Mail
    Find solutions to common issues and learn how to use Yahoo Mail effectively





中文字典-英文字典  2005-2009