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Topic: implementation of Thesa data objects
topics >
computer science >
programming >
binding of names to objects
Topic:
data types in Thesa
Topic:
named constants and expressions
Topic:
object-oriented objects
Topic:
Thesa data model
Topic:
Thesa data structures
Summary
Constants or expressions have many possible meanings. By naming constants and expressions the programmer specifies a particular meaning for what would have been a mystery number. Since literals stand for a value, they are equivalent to functions without arguments. (cbb 5/80)
Subtopic: environment
Topic: data-driven design Quote: programming by data organization: decide on modules and partition program to hide data in modules [»stroB5_1989] ;immutable
Quote: most existing databases for real-world systems require non-deletion; e.g., financial accounts [»copeG3_1980]
Subtopic: name binding
Topic: system-defined variables Quote: Algol68 includes environment enquiries for determining implementation parameters [»vanwA_1969] Quote: Icon provides system variables for the current state of the scanning function [»grisRE4_1979, OK]
Subtopic: data type
Topic: binding of names to objects Quote: use early binding for performance and late binding when early binding becomes invalid [»oppeDC7_1983] Quote: define macros for anything that may change; allows delayed binding for implementation of the macros [»browPJ_1974] Quote: dynamic binding of names to addresses allows graceful adaptation to changes [»oppeDC7_1983] Quote: a user profile contains names of mail and file servers instead of addresses; allows relocation of servers [»oppeDC7_1983] Quote: in Euclid, can bind an identifier to part of an existing variable; e.g., bind var X to A[5] [»veneT3_1978] Quote: data independence means maintaining data/file structures separately from programs; e.g., the size of the ZIP code field [»morgH_1980]
Subtopic: memory management
Group: type declaration Topic: type checking by trademark
Topic: memory management by garbage collection Quote: big gain in Cedar was garbage collection; simplifies interfaces, e.g., functions which return strings [»donaJ7_1985a] Quote: garbage collection increases flexibility of argument passing to procedure parameters and variables [»swinDC7_1985] Quote: garbage collection allows resources to be easily shared Quote: Cedar reference variables can be freely replicated and discarded due to garbage collection [»swinDC7_1985] Quote: objects created by expressions and destroyed when last reference disappears; accessed by uniform reference throughout the system [»ingaDH8_1981a] Quote: a Cedar rope is an immutable, garbage-collected, text string; widely used in all system levels [»swinDC7_1985] Quote: Cedar ropes are immutable, garbage collected, strings; same as a value [»teitW3_1985] Quote: with explicit storage allocation, programmer must avoid dangling references and storage leaks [»swinDC7_1985] Quote: without garbage collection, objects must be owned; who releases a string that is queued for printing? [»swinDC7_1985] Quote: drawback of garbage-collection is that its overhead appears only during long runs [»wolfW9_1989] Quote: to be object-oriented, a computer must provide automatic storage management [»ingaDH8_1981a]
Topic: binding of names to objects (19 items)
Topic: data types in Thesa (92 items)
Topic: named constants and expressions (21 items)
Topic: object-oriented objects (39 items)
Topic: Thesa data model (58 items)
Topic: Thesa data structures
(59 items)