1. Io language
7 languages in seven weeks
Small, embeddable, object-oriented, prototype-
based, garbage collected language; faster than
Perl, Python, Ruby; supports actors and futures for
concurrency. Influences: Smalltalk;
Act1, Self, NewtonScript; Lisp; Lua.
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3. Prototype
Commodore MAX
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4. Class
Ticonderoga class missile cruiser
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5. Prototype based vs. class based OO
languages
• New objects are cloned from a prototype
• There are no classes only prototypes
• JavaScript and Lua is a prototype based OO language
• Class based has a class description of the object.
• An Object is instanced from a class
• Java, C# and Scala are class based OO languages
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6. Io language
• Prototype based OO language
• Everything is an object
• Created in 2002 by Steven Dekorte
• Concurrency oriented
• Co-routines, futures and actors
• Lightweight and small footprint VM
• Faster than Phyton, Pearl and Ruby
• Small community
• No proper IDE and poor tooling
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7. Prototypes and objects
• Starting with uppercase is a type
• Starting with a lowercase is a instance
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8. Slots and methods
• Slots are assigned to objects
• Methods are objects and can be assigned to objects
through slots
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9. Singelton
• There is only one instance
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10. Super
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11. Strings
• Concatinate strings with ..
• Interpolate
• Split split(“”) split(“”,””)
• asUppercase asLowercase
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12. Ancestors
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13. List
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14. Map
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15. Co-routines
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16. Futures
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17. Actors
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18. Addons and import
• No import statements
• Addons are dynamically loaded when they are referenced
The Importer proto implements Io's built-in auto importer
feature. If you put each of your proto's in their own file, and
give the file the same name with and ".io" extension, the
Importer will automatically import that file when the proto is
first referenced. The Importer's default search path is the
current working directory, but can add search paths using its
addSearchPath() method.
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19. A webserver in Io
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20. CiA 2012 - Bridging the gaps
8 februar 17:30 – 20:30
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