Mercurial > repos > other > SevenLanguagesInSevenWeeks
comparison 2-Io/day1-methods.io @ 32:4d3769ac447c
Add notes and code on methods in Io
| author | IBBoard <dev@ibboard.co.uk> |
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| date | Wed, 06 Sep 2017 18:55:02 +0100 |
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| 31:2bbabcbc4802 | 32:4d3769ac447c |
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| 1 # Methods are objects, defined by some new notation: | |
| 2 # method(object message[…]) | |
| 3 | |
| 4 # This would show something in REPL but is useless in normal execution | |
| 5 method("This does nothing but print something, but with the line-break" println) | |
| 6 # Methods are of type "Block" | |
| 7 method() type println | |
| 8 # And they can be assigned to slots like values | |
| 9 Car := Object clone | |
| 10 ferrari := Car clone | |
| 11 Car drive := method("Vroom" println) | |
| 12 # Note that "cloning" isn't a one-time thing - we modified Car after creating | |
| 13 # ferrari, but it now has the `drive` method anyway. This is good, but | |
| 14 # doesn't *quite* match the naming | |
| 15 ferrari drive | |
| 16 | |
| 17 # You can also retrieve slots (methods or values), which walks up the heirarchy if necessary | |
| 18 ferrari getSlot("drive") println | |
| 19 # And you can find out what its prototype is | |
| 20 # (i.e. what it inherited from and what exists) | |
| 21 ferrari proto println | |
| 22 # But what if we add something to the ferrari? that isn't covered yet | |
| 23 ferrari name := "My Fast Car" | |
| 24 ferrari proto println | |
| 25 ferrari name println | |
| 26 # It seems to only cover the parent stuff | |
| 27 | |
| 28 # There's also a "master namespace" that all the objects get created in: | |
| 29 Lobby println |