36 ;;Quote: Smalltalk messages contain a receiver, selector and arguments

36+;;Quote: Smalltalk identifies keyword selectors by a trailing colon; concatenates them

36 ;;Quote: the selector of a Smalltalk message can be keywords before each argument

37+;;Quote: Smalltalk message invokes a method according to the receiver's class

37 ;;Quote: the result of a Smalltalk message (an object) can be a receiver or argument of another message

37 ;;Quote: unary Smalltalk messages can be composed into readable expressions

37 ;;Quote: binary Smalltalk messages by sending selector operator and second argument to first argument

37 ;;Quote: in Smalltalk, precedence order is unary, binary, keyword, left to right with parentheses

37 ;;Quote: a cascaded Smalltalk message is a selector/argument list separated by semicolons

39+;;Quote: Smalltalk actions (in a method) consist of sending messages, assigning variables, and returning a value

39 ;;Quote: a Smalltalk method describes actions for a selector received by an instance of a class

41 ;;Quote: Smalltalk classes start with uppercase while variables are lowercase

41 ;;Quote: a Smalltalk method consists of a message pattern, temporary variables, and a list of expressions

41 ;;Quote: a message pattern for a Smalltalk method consists of a selector for matching and parameters for arguments

42 ;;Quote: 'self' is a Smalltalk variable for referencing the receiver of the message; it can't be modified

43 ;;Quote: Smalltalk class variables are shared by the class and all its instances

43 ;;Quote: Smalltalk class variables are usually used as initialized constants

43 ;;Quote: Smalltalk global variables are shared by all objects; includes all classes

43 ;;Quote: most global Smalltalk variables are used for system resources; their use is otherwise discouraged

43 ;;Quote: a Smalltalk method either returns 'self' or value of last expression (up-arrow)

43 ;;Quote: Smalltalk comments are strings delimitated by double quotes

43 ;;Quote: a Smalltalk subclass inherits the instance variables and methods of its superclass

43 ;;Quote: a Smalltalk subclass can override a method in its superclass

43 ;;Quote: every Smalltalk class, except Object, has a superclass

44 ;;Quote: use 'super' to access overridden methods of a Smalltalk class

44 ;;Quote: a Smalltalk metaclass describes a class; a class's instance variables describes an instance; 'new' creates a new instance

44 ;;Quote: there is no semantic difference between class and instance messages; distinction is for organization

45 ;;Quote: a Smalltalk primitive routine is marked by '' and written in an implementation language

45 ;;Quote: a successful Smalltalk primitive exits the method; otherwise evaluate the remaining expressions

45 ;;Quote: Smalltalk indexed variables accessed by at: and at:put: selectors

46+;;Quote: a Smalltalk block is indicated by square brackets

46 ;;Quote: a Smalltalk block defers execution until it is sent 'value' or 'value:'

46 ;;Quote: Smalltalk has primitive control messages for selection and conditional iteration

46 ;;Quote: Smalltalk uses 'false' and 'true' objects for control; 'false' ignores 'ifTrue:' and evaluates 'ifFalse:'

46 ;;Quote: example of 'whileTrue:' method in Smalltalk

46 ;;Quote: Smalltalk allows a block's variables to take a sequence of values