Topic:
initialized constants
Topic:
read-only and write-once file systems
Topic:
replacement as moving information
Topic:
state machine
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Summary
Variables remember a value between operations. They are the current state of the system, which ties past events with present operations. If the variable is set only once, then it is called a dynamic constant. (cbb 5/80)
Subtopic: variable as value and future changes 
| Quote: local and global C-- variables model machine registers without an address [»ramsN6_2000]
| | Quote: a name corresponds to the initial value of possible changes to a variable [»hehnEC7_1975]
| | Quote: in object-oriented systems, a variable is an object that remembers a name and a value, and responds to access and modification messages [»liebH11_1986]
| | Quote: information is the values within the outcome of a process; a variable has multiple values, without changing the type of system [»loseRM3_1997]
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Subtopic: copy constructor
| Quote: a copy constructor creates a copy; zapping a value does not change other initializations [»dehnJC4_1998]
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Subtopic: memory of past values
| Quote: people are expected to remember past values of attributes [»adamEN1_1973]
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Subtopic: future value for concurrency
| Quote: use futures for concurrent return values, event objects, and macro-dataflow programming; wait until value is assigned; assign-once [»chriTW2_2002]
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Subtopic: memory function
| Quote: a memory function remembers the same response to a signal; a counting function is different each time [»browGS_1972]
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Subtopic: named constant
| Quote: a dynamic constant is an object which retains its first value indefinitely [»gunnIE7_1979]
| | Quote: a named constant (assign-once) can replace most variables except for repetition state [»redeDH7_1979]
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Related Topics
Topic: initialized constants (12 items)
Topic: read-only and write-once file systems (8 items)
Topic: replacement as moving information (4 items)
Topic: state machine
(67 items)
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