Answers
abstraction Focus on the essential qualities of something rather than one specific example.
actors An Actor in a use case is anything with behavior who lives outside of your system,
outside of your application, but has a goal they want to accomplish within.
algorithm A set of commands that return a value. This differs from a procedure, which is a set
of commands that doesn't necessarily have to return a value.
append() Mutates <List> by adding <Element> to the end of the list.
argument The inputs to a procedure. Also called operands.
attributes Characteristics of an object which may be used to reference other objects or save
object state information.
<name> = <expression> This is an assignment statement. A variable is named and also assigned a value or
expression. If multiple values are assigned to the same named variable, the last
assignment is the one used.
base case An expression that has a value and is not defined in terms of some other thing we
are defining. This breaks the chain of recursion.
Boolean A value that is either True or False
circular definition A definition that doesn't give us answers because it never finishes. It is stuck in a
loop with each reference pointing to another reference. It has no base case.
, class Describes what an object will be, but it isn't the object itself. This is a blueprint for
that object.
<ClassName> (<BaseClass>): How to define a class in Python
<Block>
class diagram (UML) The most common diagram in Object-Oriented Design. Shows the system classes
and relationships between them. Diagrams the primary attributes and primary
operations for each class.
code modularity Dividing software or an application into smaller modules. This provides prewritten
code which saves resources and provides greater manageability.
comparison operator Used to make a comparison between two values.
compiler A program that takes source code and converts it to machine code by producing
a separate file.
concatenate To connect or link in a series or chain.
constructor A special type of function used to create a class or object. The constructor
prepares the new object for use.
dictionary Provides a mapping between keys, which can be values of any immutable type,
and values, which can be any value. Because this is implemented using a hash
table, the time to lookup a value does not increase (significantly) even when the
number of keys increases.
if <condition>: Used in to provide a two-way decision. If the initial condition is true the first block
of code will execute. If the initial condition is false, the second block of code
else: following the else clause will execute.
encapsulation Surrounding something to both keep the contents together and also to protect
those contents. In Object Orientation this refers to the idea of taking our attributes
and behaviors and bundling them together in the same unit, or the same class.
expression Any Python construct that has a value
for <Name> in <Collection>: Executes a block once for each element of a collection.
framework Huge amounts of code already written, already tested, ready for you to link to
and use within your programs. Also called libraries.
grammar In a programming language like Python, these are the rules that the code must
adhere to. When not followed, the interpreter will return a Syntax Error message.
This means that the structure of the code is inconsistent with the rules of the
programming language. Proper formatting for an expression would be:
Expression -> Expression Operator Expression
immutable Not able to change in form or nature