Glossary

using a function by giving it inputs

a function that creates instances of a data structure

a statement of the name, domain, and range of a function

a datatype which packages several datatypes as fields

a sequence of steps that helps people document, test, and write functions

the type or set of inputs that a function expects

a way to extract the values of fields an instance

something that happens outside of a running program, which the program can respond to

a part of a data structure that has a name and holds a single value of a specified datatype

a mathematical object that consumes inputs and produces an output

Connects an event (like a tick or keypress) and a function within a reactor

a small function that handles a specific part of another computation, and gets called from other functions

the side opposite the 90-degree angle in a right triangle

a specific, packaged value of a data structure that contains other values in its fields

a collection of functions that can be made available to our program by using include

how we refer to a function or value defined in a language (examples: +, *, star, circle)

a function that computes different expressions based on its input

a set of rules for writing code that a computer can evaluate

a brief description of what a function does

the type or set of outputs that a function produces

a value that contains a current state, and functions for updating, drawing, and interacting with that state

the process of changing the style or structure of a program’s code, without changing the program’s behavior

the value of a changing system at any point in time (i.e. a stoplight can be in the 'red', 'yellow' or 'green' state). In Pyret, the state of a Reactor is it’s current value.

the set of rules that defines a language, whether it be spoken, written, or programmed.

a letter, symbol, or term that stands in for a value or expression