'Set car' presentation slideshows

Programming with State & Golden Ages

Programming with State & Golden Ages. One-Slide Summary. The substitution model for evaluating Scheme does not allow us to reason about mutation. In the environment model :

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Lecture 1 4

Lecture 1 4. - Environment Model (cont.) - Mutation - Stacks and Queues. Example: explaining make-counter. Counter: something which counts up from a number (define make-counter (lambda (n) (lambda () (set! n (+ n 1)) n )))

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Topic 19 Mutable Data Objects

Topic 19 Mutable Data Objects. Section 3.3. Mutable data. Basic operations like cons, car, cdr can construct list structure and select its parts, but cannot modify. (define x (cons 'a 'b)) x --> (a . b) Primitive mutators for pairs: set-car! And set-cdr! CHANGE the list structure itself.

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Topic 19 Mutable Data Objects

Topic 19 Mutable Data Objects. Section 3.3. Mutable data. Basic operations like cons, car, cdr can construct list structure and select its parts, but cannot modify. (define x (cons 'a 'b)) x --> (a . b) Primitive mutators for pairs: set-car! And set-cdr! CHANGE the list structure itself.

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Lecture 16: Tables and OOP

Lecture 16: Tables and OOP. Tables -- get and put. *table*. a. 1. 2. 3. 4. b. c. d. One dimentional tables. ( define (lookup key table) (let ((record (assoc key (cdr table)))) (if record (cdr record) false))). One dimentional tables.

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6.001 SICP Object Oriented Programming

6.001 SICP Object Oriented Programming. Data Abstraction using Procedures with State Message-Passing Object Oriented Modeling Class diagrams Instance diagrams Example: space wars simulation. The role of abstractions. Procedural abstractions Data abstractions. Questions:

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The role of abstractions

The role of abstractions. Procedural abstractions Data abstractions. Goal: treat complex things as primitives, and hide details. Questions: How easy is it to break system into abstraction modules? How easy is it to extend the system? Adding new data types? Adding new methods?.

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David Evans cs.virginia/evans

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Lecture 13: Assignment and the Environment Model (EM)

Lecture 13: Assignment and the Environment Model (EM). Sections 3.1 and 3.2. To apply a compound procedure P to arguments:. 1. Create a new frame A 2. Make A into an environment E: A's enclosing environment pointer goes to the same frame as the environment pointer of P

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Scheme in Scheme

Scheme in Scheme. Why implement Scheme in Scheme. Implementing a language is aa good way to learn more about programming languages Interpreters are easier to implement than compilers, in genera Scheme is a simple language, but also a powerful one

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David Evans cs.virginia/evans

David Evans http://www.cs.virginia.edu/evans. M. C. Escher, Day and Night. Class 17: Mutation. CS200: Computer Science University of Virginia Computer Science. Menu. Mutation Primitives Programming with Mutation PS 5. From Lecture 3:. Evaluation Rule 2: Names.

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David Evans cs.virginia/~evans

David Evans http://www.cs.virginia.edu/~evans. M. C. Escher, Day and Night. Lecture 18: Mutation. CS200: Computer Science University of Virginia Computer Science. Menu. Mutation Primitives PS 5. From Lecture 3:. Evaluation Rule 2: Names.

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6.001 Recitation 12: Mutation!

6.001 Recitation 12: Mutation!. 21 March 2007 RI: Gerald Dalley ( dalleyg@mit.edu ) http://people.csail.mit.edu/dalleyg/6.001/SP2007/. Modifying Bindings. (set! <name> <value>)  undefined

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