CMPSC 461: Programming Language Concepts Midterm 1 Solution Lambda Calculus Problem 1 [10pt] Consider a λ-term λx. λy. x z λx. x 1. (6pt) Compute the set of free variables in the term. Show the detailed derivation in your answer. only z is free 2. (4pt) Based on the results above, connect all bound variables […]
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EELS 1021 object-Oriented From Programming Sensors to Actuators Winter 219 : J a nuary 7 Mond a y Lecture I Low – Level PL us . High- Level PL e#- gum HI *⇒. 1€ oEEYln4sI 7 ARE whip Late → assignment given completed programming → I. session lab quit ? . graded Watt until you
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Certification of Safety-Critical, Software-Intensive Systems EECS4312: Software Engineering Requirements Fall 2019 CHEN-WEI WANG Acknowledgement of Collaborators McSCert, McMaster University, Canada ○ Alan Wassyng [ faculty, P.Eng. ] ○ Mark Lawford [ faculty, P.Eng. ] ○ Linna Pang [PhD student] Software Engineering Laboratory, York University, Canada ○ Jonathan Ostroff [ faculty, P.Eng. ] ○ Simon Hudon
Parser: Syntactic Analysis Readings: EAC2 Chapter 3 EECS4302 M: Compilers and Interpreters Winter 2020 CHEN-WEI WANG Parser in Context ○ Recall: Lexical Analysis Source Program (seq. of characters) Scanner Syntactic Analysis seq. of tokens Parser Semantic Analysis AST1 … ASTn pretty printed Target Program ○ Treats the input programas as a a sequence of classified
The Visitor Design Pattern EECS3311 A: Software Design Fall 2019 CHEN-WEI WANG Motivating Problem (1) Based on the you learned, design classes to model of arithmetic expressions (e.g., 341, 2, 341 + 2). EXPERSSION* value: INTEGER COMPOSITE* left, right: EXPRESSION composite pattern structures 2 of 13 CONSTANT+ ADDITION+ Motivating Problem (2) Extend the composite pattern
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Motivating Problem Whenever the display feature is called, retrieve the current values of temperature, humidity, and/or pressure via the weather data reference. 3 of 36 Implementing the First Design (1) class WEATHER_DATA create make feature — Data temperature: REAL humidity: REAL pressure: REAL feature — Queries correct_limits(t,p,h: REAL): BOOLEAN ensure Result implies -36
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Monda cture y Feb . 2 6 Le 7 – Practice lab test 5 tutorial document solution lab . New Tutorial 2 series MED k¥#1 ” negation C! ) Moine # tI•¥tTeIaeE*oafaf•¥H#E1 be fonjunction ( &&) disjunction ( 11 ) evaluate bz b€2μpv short – Grant . false the PEG bl p are 2 ✓
The State Design Pattern Readings: OOSC2 Chapter 20 EECS3311 A: Software Design Fall 2019 CHEN-WEI WANG State Transition Diagram Characterize as: 1) A set of states; and 2) For each state, its list of applicable transitions (i.e., actions). e.g., Above reservation system as a : finite state machine (6) Final 1 (1) Initial 33 (5)
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The Visitor Design Pattern EECS3311 A & E: Software Design Fall 2020 CHEN-WEI WANG Learning Objectives 1. Motivating Problem: Processing Recursive Systems 2. First Design Attempt: Cohesion & Single-Choice Principle? 3. Open-Closed Principle 4. Second Design Attempt: Visitor Design Pattern 5. Implementing and Testing the Visitor Design Pattern 2 of 15 Motivating Problem (1) Based
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Test-Driven Development (TDD) with JUnit EECS2030 B: Advanced Object Oriented Programming Fall 2019 CHEN-WEI WANG Motivating Example: Two Types of Errors (2) Approach 1 – Specify: Indicate in the method signature that a specific exception might be thrown. Example 1: Method that throws the exception Example 2: Method that calls another which throws the exception
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