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Topic: S expressions


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In the News (Thu 31 Dec 09)

  
  Expressions
Each expression occurs in the declaration of some (class or interface) type that is being declared: in a field initializer, in a static initializer, in a constructor declaration, or in the code for a method.
Within an FP-strict expression, all intermediate values must be elements of the float value set or the double value set, implying that the results of all FP-strict expressions must be those predicted by IEEE 754 arithmetic on operands represented using single and double formats.
A parenthesized expression is a primary expression whose type is the type of the contained expression and whose value at run time is the value of the contained expression.
java.sun.com /docs/books/jls/second_edition/html/expressions.doc.html   (14699 words)

  
  Twisted Documentation: Lisp in Python
An S expression may be a symbol, a number, or a series of S expressions in parentheses.
It is followed by an S expression with the function parameters, and an S expression which is the body of the funciton.
As long as the user inputs an S expression to evaluate, it is passed to eval and the result printed.
www.ibiblio.org /obp/py4fun/lisp/lisp.html   (1876 words)

  
 Expressions & Sayings (S)   (Site not responding. Last check: 2007-10-31)
This expression, which means to have to use someone or something of poor or inferior quality because that is all that is available, refers to the fact that people will only scrape out the bottom of an empty barrel if they have no more full ones.
Despite this antiquity the expression was not used in its modern secular sense until the 19th century, probably as a result of increased British familiarity with Islam during the period of empire.
To complete this transformation of a rustic expression into a nautical-sounding one, the rather extravagant and unconvincing idea of 'losing' an entire ship for the sale of a small economy was changed to 'spoiling' and the now familiar version emerged in the mid-19th century.
users.tinyonline.co.uk /gswithenbank/sayingss.htm   (9525 words)

  
 O'Reilly Media -- Bookstore: Mastering Regular Expressions
Regular expressions, a powerful tool for manipulating text and data, are found in scripting languages, editors, programming environments, and specialized tools.
Regular expressions are not a tool in and of themselves, but are included as part of a larger utility.
Regular expressions are not used in a vacuum.
www.oreilly.com /catalog/regex   (1506 words)

  
 Variables and Expressions
The latter method is preferred by many due to its greater clarity, and because it supports an expression syntax nearly identical to that in many other languages.
Expressions are used to perform one or more operations upon a series of variables, literal strings, and/or literal numbers.
Force an expression: An expression can be used in a parameter that does not directly support it (except an OutputVar or InputVar parameter such as those of StringLen) by preceding the expression with a percent sign and a space or tab.
www.autohotkey.com /docs/Variables.htm   (6144 words)

  
 Syntax and Semantics
When the first element of a list is a symbol naming a special operator, the rest of the expressions are evaluated according to the rule for that operator.
It's easy to lose track when you're typing expressions at the REPL because the two phases happen one after another and the value of the second phase is immediately returned.
s at the end may seem forbidding, but as long your code is properly indented the parentheses should fade away--no need to give them undue prominence by spreading them across several lines.
www.gigamonkeys.com /book/syntax-and-semantics.html   (5351 words)

  
 The |STAT Home Page and Handbook : Data Manipulator Tutorial and Manual
's input is a file with some set number of columns.
Expressions are written in common computer language syntax, and can have spaces or underscores inserted for readability anywhere except (1) in the middle of constants, and (2) in the middle of multicharacter operators such as
The conditional expression is of lowest precedence and groups left to right, however parentheses are recommended to make the semantics obvious.
www.acm.org /~perlman/stat/dm.html   (2105 words)

  
 Recursive Functions of Symbolic Expressions   (Site not responding. Last check: 2007-10-31)
Since many of the symbolic expressions with which we deal are conveniently expressed as lists, we shall introduce a list notation to abbreviate certain S-expressions.
Since we regard the expressions with commas as abbreviations for those not involving commas, we shall refer to them all as S-expressions.
The expressions representing these functions are written in a conventional functional notation.
www-formal.stanford.edu /jmc/recursive/node3.html   (1521 words)

  
 After Effects Expressions: A CreativeCOW.net series
The After Effects expression language has a seldom-used random number generator that is really quite a gem.
In this tutorial, Dan Ebberts demonstrates a method of generating motion that is random in both time and space and allows you to quickly assemble a composition with a pleasantly fluid, chaotic movement.
If you are unfamiliar with expressions in After Effects 5, you may want to read the chapter "Creating Expressions" in the After Effects 5.0 manual before continuing with this tutorial.
www.creativecow.net /articles/aftereffects_expressions.html   (1021 words)

  
 SOL: S -- EXPRESSIONS OF INTERESTS FOR JANITORIAL SERVICES CONTRACT (11/01/01)
Expressions of interest shall be received no later than 09 November 2001.
HQ SACLANT reserves the right to cancel this request for expressions of interest and the subsequent invitation to bid at any time in whole or in part with no charges or fees to be levied against HQ SACLANT.
All expressions of interest shall be forwarded to: North Atlantic Treaty Organization, Supreme Allied Commander, Atlantic 7857 Blandy Road, Suite 100, Norfolk, VA. 23551-2490 Attention: Contracting Officer.
www.fbodaily.com /cbd/archive/2001/11(November)/01-Nov-2001/ssol005.htm   (2782 words)

  
 Access to the R engine from Perl
The arguments are =over 4 =item[1] the name of the S function or an RFunctionReference object obtained from an earlier computation =item[2] an arbitrary number of arguments which are converted to S values and used as arguments to the S function, in the same order they are giving here.
If the value of this call is assigned in Perl or passed on to another call, the return value from the S function is converted to a Perl object.
However, it is convenient for evaluating self-contained S expressions such as interactive queries of the state of the S session, defining functions and methods, etc.
www.omegahat.org /RSPerl/R.html   (727 words)

  
 [No title]
is a direct consequence of some of the preceding expressions by virtue of one of the rules of inference.
A decidable proof system is, roughly speaking, one for which a machine can be advised to test its expressions for theoremhood, whereas, in an undecidable theory, ingenuity is required to determine whether the expressions are theorems.
A proof system, for which there is a mechanical method for determining, given any expression A of the system, not only whether there is a proof of A, but also of finding such a proof, is called syntactically decidable; otherwise it is syntactically undecidable.
www.cs.sunysb.edu /~cse537/Chapter2/Proof_Systems.html   (3205 words)

  
 XML Schema Part 2: Datatypes: Regular Expressions
A regular expression R is a sequence of characters that denote a set of strings L(R).
When used to constrain a lexical space, a regular expression R asserts that only strings in L(R) are valid literals for values of that type.
These characters have special meanings in regular expressions, but can be escaped to form atoms that denote the sets of strings containing only themselves, i.e., an escaped metacharacter behaves like a normal character.
www.stylusstudio.com /w3c/schema2/regexs.htm   (502 words)

  
 Comparing XLANG/s and C#
The expression editor, in the first instance, edits a representation of your expression held in the designer XML in the.odx file, and because the editor thinks it is illegal to use unqualified type names, it places an #error directive within the actual XLANG/s code.
Each scope is represented at runtime by a scope context object, and each variable declared at that scope level is represented by an internal field of that class.
When an inner scope contains an expression that uses a variable from an outer scope, the orchestration code generator generates a field in the inner scope class of the same name and type as the corresponding field on the outer scope class.
geekswithblogs.net /cyoung/articles/3820.aspx   (1735 words)

  
 S Documentation Engine   (Site not responding. Last check: 2007-10-31)
Computations for online help are a combination of S computations on these objects and other computations using a mapping of documentation objects to the SGML language.
The advantage of this organization is that both the S and the SGML versions of the documentation are capable of representing the structure of the information.
The S side of the computations can map information from general S objects into the documentation (for example, using objects that represent S expressions), while the SGML side can organize both structural information about the document (what information is allowed and where) and also rendering information when web-based tools are used to view the documentation.
cm.bell-labs.com /cm/ms/departments/sia/Sbook/Documentation/index.html   (172 words)

  
 PostgreSQL: Documentation: Manuals: PostgreSQL 8.2: Pattern Matching
A string is said to match a regular expression if it is a member of the regular set described by the regular expression.
patterns, a regular expression is allowed to match anywhere within a string, unless the regular expression is explicitly anchored to the beginning or end of the string.
When it appears inside a bracket expression, all case counterparts of it are added to the bracket expression, e.g.
www.postgresql.org /docs/current/static/functions-matching.html   (3601 words)

  
 ASPN : Python Cookbook : XYAPTU: Lightweight XML/HTML Document Template Engine for Python   (Site not responding. Last check: 2007-10-31)
A page template may therefore contain anything that targeted clients will accept, with the addition of five XML tags and one 'pcdata' expression token, as mark-up for the python code that defines the coupling between the presentation to the application data.
Xyaptu is python-centric, in the sense that the XML tags offered reflect python constructs (such as python expressions, statements, opening and closing blocks) and not particularly constructs typically identified in web page templates.
Python expressions are also mapped to a 'pcdata' token, to allow the use of python expressions also in places where tags are not allowed, i.e.
aspn.activestate.com /ASPN/Cookbook/Python/Recipe/162292   (1152 words)

  
 XML.com: Regular Expression Matching in XSLT 2
For example, to replace all dollars and cents expressions with the string "$xx.xx", you can assemble a regular expression to show that you want to search for any string consisting of a dollar sign followed by one or more numeric digits, a period, and then two more digits.
Regular Expression Syntax section of the XQuery 1.0 and XPath 2.0 Functions and Operators specification describes these flags in more detail; it also provides g background on the roots of the XPath regular expression support in the W3C Schema specification.
In regular expressions, a period can be used to represent any character (as we saw at the very beginning of this regular expression) but we're looking for an actual period here, so it has a backslash like the one before the dollar sign.
www.xml.com /pub/a/2003/06/04/tr.html   (1915 words)

  
 Expressions - Photoblogging for photographers by photographers
But it is also a community of photographers and artists who take pride in their work.
The best way to see if Expressions is right for you is to give it a whirl with our 30-day free trial.
"If your photos are works of art, and you demand a photoblog that's just as attractive, try Expressions."
my-expressions.com   (114 words)

  
 Technology As If People Mattered : Weblog   (Site not responding. Last check: 2007-10-31)
Knowing how to use regular expressions is a lot like knowing how to cook: even though it is an incredibly useful skill, many people avoid learning.
There are just a couple of humps you need to get over to really understand regular expressions, and this is the first one: The asterisk ‘*‘ means to match zero or more of the thing that came just before it.
The expression ‘[aeiou]*‘ will match any number of vowels: the whole ‘[aeiou]‘ pattern is the thing that came before the star.
jroller.com /page/rolsen?entry=regular_expressions_in_ten_steps   (1435 words)

  
 Black Expressions
You can contact Black Expressions with your questions and/or comments about the website, your membership, or the Club by writing to: Black Expressions, Member Service Center, PO Box 6300, Camp Hill, PA 17012-6300 or by sending an e-mail to service@memberservice.com (please be sure to include your account number and email address to facilitate our response).
Black Expressions is free to use any ideas, concepts, know-how or techniques contained in any communication you send to the Site for any purpose whatsoever including, but not limited to, developing, manufacturing and marketing products using such information.
Black Expressions also assumes no responsibility, and shall not be liable for any damages to, or viruses that may infect, your computer equipment or other property on account of your access to, use of, or browsing in, the Site or your downloading of any materials, data, text, images, video or audio from the Site.
www.blackexpressions.com /doc/mini_site/ms_terms_cond.jhtml   (2498 words)

  
 [No title]
If matching regular expressions is analogous to a walk in the woods, then the tools discussed in Part 1 are analogous to topo maps and a compass, basic tools we use all the time.
If the code expression is a conditional, the code is evaluated and the result (i.e., the result of the last statement) is used to determine truth or falsehood.
The pattern code expression is like a regular code expression, except that the result of the code evaluation is treated as a regular expression and matched immediately.
keck.ucsf.edu /~kvale/perlretut.pod   (11358 words)

  
 Amazon.com: Mastering Regular Expressions, Second Edition: Books: Jeffrey E F Friedl   (Site not responding. Last check: 2007-10-31)
Regular expressions allow you to code complex and subtle text processing that you never imagined could be automated.
If you don't know what a regular expression is then you have no need for this book, but if you have ever worked with regular expressions then you are in for a treat with this book.
After a basic introduction covering the most common tasks regular expressions are used for (substitution, selection, wild cards, etc.) the author delves into examples of regular expressions in Perl, and follows that with a section discussing some of the variations in regular expressions as implemented in different languages and common programs.
www.amazon.com /Mastering-Regular-Expressions-Second-Jeffrey/dp/0596002890   (2381 words)

  
 Transfer Function Models :: LTI Models (Creating and Manipulating Models)
Transfer function: s -------------- s^2 + 2 s + 10
s = tf('s') h11 = (s-1)/(s+1); h21 = (s+2)/(s^2+4*s+5);
s - 1 #1: ----- s + 1 s + 2 #2: ------------- s^2 + 4 s + 5
www.mathworks.com /access/helpdesk/help/toolbox/control/manipmod/ltisys11.html   (368 words)

  
 Molecular Expressions: Images from the Microscope
Welcome to the Molecular Expressions website featuring our acclaimed photo galleries that explore the fascinating world of optical microscopy.
We are going where no microscope has gone before by offering one of the Web's largest collections of color photographs taken through an optical microscope (commonly referred to as "photo-micro-graphs").
Together with the scientists and programmers at Molecular Expressions, Nikon microscopists and engineers are providing the latest state-of-the-art information in microscope optics and imaging technology including specialized techniques such as fluorescence, differential interference contrast (DIC), phase contrast, reflected light microscopy, and microscopy of living cells.
molecularexpressions.com   (5812 words)

  
 Algebra Basics - Evaluating expressions - First Glance   (Site not responding. Last check: 2007-10-31)
We have learned that, in in an algebraic expression, letters can stand for numbers.
Let's evaluate the expression 3y + 2y when 5 = y.
Perform the operations, to find the value of the expression.
www.math.com /school/subject2/lessons/S2U2L3GL.html   (77 words)

  
 MATHS: Programs
This can be taken further when A and B do not overlap so that (v:=e) is a well defined operator on a map from A to B whenever v:A and e is an expression that has elements of both A and B in it.
For each Address v in an expression e, all occurrences of v are removed and replaced by f(v).
A better formulation (mathematically speaking) is that fun[e](value(e,f) always defines a homomorphism between expressions and values that preserves all the operations used in the expressions.
www.csci.csusb.edu /dick/maths/math_75_Programs.html   (2331 words)

  
 perl.com: Beginner's Introduction to Perl - Part 3   (Site not responding. Last check: 2007-10-31)
Notice the syntax of a regular expression: a string within a pair of slashes.
Regular expressions have a rich vocabulary of metacharacters that let you ask interesting questions such as, ``Does this expression occur at the end of a string?'' or ``Does this string contain a series of numbers?''
Regular expressions have two traps that generate bugs in your Perl programs: They always start at the beginning of the string, and quantifiers always match as much of the string as possible.
www.perl.com /pub/2000/11/begperl3.html   (2711 words)

  
 CS 412   (Site not responding. Last check: 2007-10-31)
For each of the following IC statements or expressions, state whether it is well-typed in some type context and if so, what its type is. If it is well-typed, give a type context in which it has a type and provide the corresponding typing derivation.
Each translation rule must define [E, L1, L2], which is the low-level IR code for E which branches to L1 if E evaluates to true and to L2 if E evaluates to false.
Consider the a simple language whose statements S, expressions E, and types T are defined by the following grammar:
www.cs.cornell.edu /courses/cs412/2002sp/hw/hw3.html   (239 words)

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