'Expression evaluation' diaporamas de présentation

Introduction to XML Path Language (XPath20)

Introduction to XML Path Language (XPath20). Cheng-Chia Chen. What is XPath ?. Latest version: 2.0 : http://www.w3.org/TR/xpath20 XQuery/XPath Data Model (XDM) XQuery/XPath Formal Semantics XQuery 1.0 and XPath 2.0 Functions and Operators 1. 0 : http://www.w3.org/TR/xpath

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Expressions and Statements

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Functional Programming

Functional Programming. Element of Functional Programming. Functional Programming. Functional Programming began as computing with expressions. The following are examples:. 2 An integer constant X A variable log n Function log applied to n

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Our First Data Structure

Our First Data Structure. The story so far We understand the notion of an abstract data type. Saw some fundamental operations as well as advanced operations on arrays. This week we will use the array ADT but in a slightly different manner(s). and advanced applications of the data structure.

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Programming Language Semantics

Programming Language Semantics. Mooly Sagiv Eran Yahav msagiv@post yahave@post Schrirber 317 Open space 03-640-7606 03-640-5358 html://www.cs.tau.ac.il/~msagiv/courses/sem03.html Textbook:Winskel The Formal Semantics of Programming Languages

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Formal Semantics of Programming Language s

Formal Semantics of Programming Language s. Topic 2: Operational Semantics. ??? yhq@ecust.edu.cn. IMP: A Simple Imperative Language. numbers N Positive and negative numbers n, m ? N truth values T={true, false} locations Loc X, Y ? Loc arithmetic Aexp a ? Aexp

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Lecture 5 Sept 15 Goals: stacks Implementation of stack

Lecture 5 Sept 15 Goals: stacks Implementation of stack applications Postfix expression evaluation Convert infix to postfix. Stack Overview. Stack ADT Basic operations of stack push, pop, top, isEmpty etc. Implementations of stacks using

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Lecture 7 Sept 16 Goals: stacks Implementation of stack

Lecture 7 Sept 16 Goals: stacks Implementation of stack applications Postfix expression evaluation Convert infix to postfix. Stack Overview. Stack ADT Basic operations of stack push, pop, top, isEmpty etc. Implementations of stacks using

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CSE115: Introduction to Computer Science I

CSE115: Introduction to Computer Science I. Dr. Carl Alphonce 219 Bell Hall NEW ? 645-4739 ? NEW alphonce@buffalo.edu. Agenda. Cell phones off & name signs out Review Questions? Objects The birds-and-the-bees talk Communicating with objects. Review.

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CSCI 330: Programming Language Concepts Instructor: Pranava K. Jha

CSCI 330: Programming Language Concepts Instructor: Pranava K. Jha. Control Flow-I: Expressions. Control Flow. Basic paradigms for control flow: Sequencing Selection Iteration Procedural abstraction Recursion Concurrency Exception handling and speculation Nondeterminacy. Expressions.

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Executable Part

Executable Part. This is an important part of a program This is a list of statements executed by the machine The statements are of two kinds: Those perform operations on the variables control statements : specify the sequence of statement execution

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DCO 20105 Data structures and algorithms

DCO 20105 Data structures and algorithms. Lecture 12: Stack and Expression Evaluation Stack basic operations of a stack its implementation using a vector applications of stack Expression Evaluation Infix, Prefix, and Postfix expressions Implementation of evaluating a postfix expression

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The New IEEE-754 Standard for Floating Point Arithmetic

The New IEEE-754 Standard for Floating Point Arithmetic. Original IEEE 754 Standard. Adopted in 1985 Intended for hardware implementation Provision for software implementation of some operations Appendix of recommended fuctions Standard and alternate exception handling

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Imperative Languages

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Problets: Online Programming Tutors for Computer Science I

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Lecture 13: Expression Evaluation

The University of North Carolina at Chapel Hill. Lecture 13: Expression Evaluation. COMP 144 Programming Language Concepts Spring 2002. Felix Hernandez-Campos Feb 8. Control Flow. Control flow refers to the order in which a program executes

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An example

An example. An example. Evaluation of arithmetic expressions. If we evaluate an expression tree bottom-up , it will take O( n ) time for a long and skinny tree. Hence we apply tree contraction. Evaluation of arithmetic expressions.

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Expressions

Expressions. Programming Language Design and Implementation (4th Edition) by T. Pratt and M. Zelkowitz Prentice Hall, 2001 Section 8.1-8.2. Execution-time representation. Machine code sequence Tree representation Pre-fix or post-fix. Tree structure rules. Slow ? software interpreter

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