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：

Perl    音标拼音: [p'ɚl]
A {high-level} programming language, started
by {Larry Wall} in 1987 and developed as an {open source}
project. It has an eclectic heritage, deriving from the
ubiquitous {C} programming language and to a lesser extent
from {sed}, {awk}, various {Unix} {shell} languages, {Lisp},
and at least a dozen other tools and languages. Originally
developed for {Unix}, it is now available for many
{platforms}.

Perl's elaborate support for {regular expression} matching and
substitution has made it the {language of choice} for tasks
involving {string manipulation}, whether for text or binary
data. It is particularly popular for writing {CGI scripts}.

The language's highly flexible syntax and concise regular
expression operators, make densely written Perl code
indecipherable to the uninitiated. The syntax is, however,
really quite simple and powerful and, once the basics have
been mastered, a joy to write.

Perl's only {primitive} data type is the "scalar", which can
hold a number, a string, the undefined value, or a typed
reference. Perl's {aggregate} data types are {arrays}, which
are ordered lists of {scalars} indexed by {natural numbers},
and hashes (or "{associative arrays}") which are unordered
lists of scalars indexed by strings. A reference can point to
a scalar, array, hash, {function}, or {filehandle}. {Objects}
are implemented as references "{blessed}" with a {class} name.
Strings in Perl are {eight-bit clean}, including {nulls}, and
so can contain {binary data}.

Unlike C but like most Lisp dialects, Perl internally and
dynamically handles all memory allocation, {garbage
collection}, and type {coercion}.

Perl supports {closures}, {recursive functions}, {symbols}
with either {lexical scope} or {dynamic scope}, nested {data
structures} of arbitrary content and complexity (as lists or
hashes of references), and packages (which can serve as
classes, optionally inheriting {methods} from one or more
other classes). There is ongoing work on {threads},
{Unicode}, {exceptions}, and {backtracking}. Perl program
files can contain embedded documentation in {POD} (Plain Old
Documentation), a simple markup language.

The normal Perl distribution contains documentation for the
language, as well as over a hundred modules (program
libraries). Hundreds more are available from The
{Comprehensive Perl Archive Network}. Modules are themselves
generally written in Perl, but can be implemented as
interfaces to code in other languages, typically compiled C.

The free availability of modules for almost any conceivable
task, as well as the fact that Perl offers direct access to
almost all {system calls} and places no arbitrary limits on
data structure size or complexity, has led some to describe
Perl, in a parody of a famous remark about {lex}, as the
"Swiss Army chainsaw" of programming.

The use of Perl has grown significantly since its adoption as
the language of choice of many {World-Wide Web} developers.
{CGI} interfaces and libraries for Perl exist for several
{platforms} and Perl's speed and flexibility make it well
suited for form processing and on-the-fly {web page} creation.

Perl programs are generally stored as {text} {source} files,
which are compiled into {virtual machine} code at run time;
this, in combination with its rich variety of data types and
its common use as a glue language, makes Perl somewhat hard to
classify as either a "{scripting language}" or an
"{applications language}" -- see {Ousterhout's dichotomy}.
Perl programs are usually called "Perl scripts", if only for
historical reasons.

Version 5 was a major rewrite and enhancement of version 4,
released sometime before November 1993. It added real {data
structures} by way of "references", un-adorned {subroutine}
calls, and {method} {inheritance}.

The spelling "Perl" is preferred over the older "PERL" (even
though some explain the language's name as originating in the
acronym for "Practical Extraction and Report Language"). The
program that interprets/compiles Perl code is called
"perl", typically "/usr/local/bin/perl" or "/usr/bin/perl".

Latest version: 5.005_03 stable, 5.005_62 in development, as
of 1999-12-04.

{(http://perl.com/)}.

{Usenet} newsgroups: {news:comp.lang.perl.announce},
{news:comp.lang.perl.misc}.

["Programming Perl", Larry Wall and Randal L. Schwartz,
O'Reilly & Associates, Inc. Sebastopol, CA. ISBN
0-93715-64-1].

["Learning Perl" by Randal L. Schwartz, O'Reilly & Associates,
Inc., Sebastopol, CA].

[{Jargon File}]

(1999-12-04)

Practical Extraction and Report Language (PERL)

Perl: /perl/, n. [Practical Extraction and Report Language, a.k.a. Pathologically
Eclectic Rubbish Lister] An interpreted language developed by Larry Wall,
author of
patch(1)
and
rn(1)).
Superficially resembles awk, but is much hairier,
including many facilities reminiscent of
sed(1)
and shells and a comprehensive Unix system-call interface. Unix sysadmins,
who are almost always incorrigible hackers, generally consider it one of
the languages of choice, and it is by far the most
widely used tool for making ‘live’ web pages via CGI. Perl has
been described, in a parody of a famous remark about
lex(1),
as the Swiss-Army chainsaw of Unix programming.
Though Perl is very useful, it would be a stretch to describe it as pretty
or elegant; people who like clean, spare design
generally prefer Python. See also Camel
Book, TMTOWTDI.


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


  • The Perl Programming Language - www. perl. org
    The Perl Programming Language at Perl org Links and other helpful resources for new and experienced Perl programmers
  • Perl - Wikipedia
    Perl was developed by Larry Wall in 1987 as a general-purpose Unix scripting language to make report processing easier [10][11] Since then, it has undergone many changes and revisions Perl originally was not capitalized and the name was changed to being capitalized by the time Perl 4 was released [11]
  • Strawberry Perl for Windows
    It is designed to be as close as possible to perl environment on UNIX systems It includes perl binaries, compiler (gcc) + related tools, all the external libraries (crypto, math, graphics, xml…), all the bundled database clients and all you expect from Strawberry Perl
  • Perl. com - programming news, code and culture
    This article introduces Podlite to the Perl community, explores the 1 0 specification, shows real examples, and demonstrates early integrations with Perl Read it
  • Perl Programming Language - GeeksforGeeks
    Perl is a general purpose, high level interpreted and dynamic programming language Perl supports both the procedural and Object-Oriented programming Perl is a lot similar to C syntactically and is easy for the users who have knowledge of C, C++
  • The Perl Programming Language - GitHub
    Object oriented versions for all Perl releases from 5 6 2 onward This repository is for Proposed Perl Changes - proposals to change the Perl language The Perl Programming Language has 8 repositories available Follow their code on GitHub
  • Perl Tutorial
    Perl is a programming language developed by Larry Wall, especially designed for text processing It stands for Practical Extraction and Report Language It runs on a variety of platforms, such as Windows, Mac OS, and the various versions of UNIX
  • Perl Tutorial
    This Perl tutorial helps you learn basic Perl Programming language from scratch with many examples
  • Perl Programming language tutorial for beginner examples
    Perl is an easy and simple programming language to learn for beginners If you have one programming language such as C, It is straightforward and quick to learn
  • Personalized Listening Earbuds | Denon PerL
    YOUR MUSIC, TUNED YOUR WAY Signature Denon sound, personalized for your ears Denon PerL Pro uses Adaptive Acoustic Technology ™ (AAT) to measure your full ear’s response to sound and create an individualized listening profile that provides unparalleled depth, detail, and clarity—precisely tuned to you





中文字典-英文字典  2005-2009