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Revision 1983, 1.5 KB
(checked in by Chuck.Esterbrook, 3 years ago)
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Update How To's to match the current Cobra syntax and feature set.
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Property svn:eol-style set to
native
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| 1 | """ |
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| 2 | Cobra supports both static and dynamic typing. |
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| 3 | |
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| 4 | See also: http://cobra-language.com/docs/release-notes/Cobra-0.5.0.html |
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| 5 | """ |
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| 6 | |
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| 7 | class Person |
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| 8 | |
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| 9 | get name as String |
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| 10 | return 'Blaise' |
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| 11 | |
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| 12 | |
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| 13 | class Car |
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| 14 | |
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| 15 | get name as String |
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| 16 | return 'Saleen S7' |
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| 17 | |
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| 18 | |
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| 19 | class Program |
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| 20 | |
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| 21 | shared |
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| 22 | |
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| 23 | def main |
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| 24 | assert .add(2, 3) == 5 |
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| 25 | assert .add('Hi ', 'there.') == 'Hi there.' |
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| 26 | .printName(Person()) |
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| 27 | .printName(Car()) |
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| 28 | |
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| 29 | def add(a, b) as dynamic |
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| 30 | return a + b |
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| 31 | |
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| 32 | def printName(x) |
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| 33 | print x.name # dynamic binding |
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| 34 | |
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| 35 | |
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| 36 | class Notes |
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| 37 | |
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| 38 | def add(a, b) as dynamic |
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| 39 | return a + b |
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| 40 | # + flexible (any type with "+" operator works) |
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| 41 | # + fast prototyping |
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| 42 | # + less brittle wrt other software components that change unpredictably |
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| 43 | # + more reusable |
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| 44 | # - errors detected late (run-time) |
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| 45 | # - one error reported at a time (the first one that throws an exception) |
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| 46 | # - slow at run-time |
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| 47 | # - fat at run-time (values must carry type information; boxing) |
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| 48 | # - difficult IDE support |
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| 49 | # (Intellisense/autosuggestion requires complex analysis and/or execution of code) |
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| 50 | |
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| 51 | def add(a as decimal, b as decimal) as decimal |
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| 52 | return a + b |
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| 53 | # - inflexible |
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| 54 | # - slower coding / more typing |
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| 55 | # - more brittle (to change program to `float` you must find and replace everywhere) |
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| 56 | # - less reusable (cannot use with int and float) |
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| 57 | # + errors detected early (compile-time) |
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| 58 | # + multiple errors reported (every one that the compiler can find) |
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| 59 | # + fast at run-time |
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| 60 | # + slim at run-time (values need only carry data) |
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| 61 | # + easy IDE support (Intellisense/autosuggestion) |
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