 music |
 | � | OSdata.com |
enumerated types
summary
����The enumerated types are used for countable items, such as the cards in a deck of ordinary playing cards.
����This is a brief introduction. This data type is explained in detail in the chapter on enumerated ordinal types.
enumerated values
����This is a brief introduction. This data type is explained in detail in the chapter on enumerated ordinal types.
����The enumerated types are used for countable items, such as the cards in a deck of ordinary playing cards.
enumerated type
����Many modern programming languages have an enumerated value data type. If not, a sequence of integers can be used instead. The enumerated data type simply makes it easier to keep track of the meaning of the integer values.
����The following material is from the unclassified Computer Programming Manual for the JOVIAL (J73) Language, RADC-TR-81-143, Final Technical Report of June 1981.
����
The kinds of values provided by JOVIAL reflect the applications
����
of the language; they are oriented toward engineering and contrl
����
programming rather than, for example, commercial and business
����
programming.��The JOVIAL values are:
����
6.��Status values, which are special words.��They are used
����
����to describe the status of the system, or a particular
����
����part of the system, at any given time.��For example, status values of "V(OK)", "V(WEAK)", or "V(BAD)" can be
����
����used to indicate the condition of a power cell.
����Chapter 1 INTRODUCTION, page 3
���������ITEM INDICATOR STAUS (V(RED),V(YELLOW),V(GREEN));
�������������������������������A status item, whose value can be
�������������������������������thought of as "V(RED)", "V(YELLOW)",
�������������������������������or "V(GREEN)" but which is, in fact,
�������������������������������compactly stored as an integer.��Thus
�������������������������������a programmer culd assign "V(RED)" to a
�������������������������������variable to indicate cooling system
�������������������������������failure instead of using a (presumably
�������������������������������non-mnemonic) integer.
����Chapter 1 INTRODUCTION, page 5
����1.1.5 Built-In Functions
����The JOVIAL built-in functions provide advanced, specialized
����operations that are not covered by the JOVIAL operators.
���������NEXT(s,i)������The i'th status value after status value s
���������FIRST(s)�������First status value in status list for s
���������LAST(s)��������Last status value in status list for s
����Chapter 1 Introduction, page 9
����This is a brief introduction. This data type is explained in detail in the chapter on enumerated ordinal types.
free music player coding example
����Coding example: I am making heavily documented and explained open source code for a method to play music for free � almost any song, no subscription fees, no download costs, no advertisements, all completely legal. This is done by building a front-end to YouTube (which checks the copyright permissions for you).
����View music player in action: www.musicinpublic.com/.
����Create your own copy from the original source code/ (presented for learning programming).
Because I no longer have the computer and software to make PDFs, the book is available as an HTML file, which you can convert into a PDF.
����Names and logos of various OSs are trademarks of their respective owners.