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root/cobra/trunk/HowTo/250-DeclareVariableNumberOfArgs.cobra

Revision 2127, 0.8 KB (checked in by Chuck.Esterbrook, 3 years ago)

Take out is shared on def main in the how-to's.

  • Property svn:eol-style set to native
Line 
1"""
2How to declare and use variable number of arguments:
3
4    * Put the `vari` keyword before the type of the argument.
5    * Use a `for` loop to enumerate through them.
6
7You don't need to specify the type of the variable in the `for` loop. Cobra
8infers that from what is being enumerated.
9
10Also the var args are compatible with IEnumerable<of T> and IEnumerable.
11So you can pass the argument wherever those types are expected.
12"""
13
14
15class Test
16
17    def allTrue(stuff as vari dynamic?) as bool
18        """ Returns true only if all the stuff passed in is true. """
19        for x in stuff, if not x, return false
20        return true
21
22    def sumInts(stuff as vari int) as int
23        """ Return the sum of all the ints. """
24        sum = 0
25        for x in stuff, sum += x
26        return sum
27
28    def main
29        t = Test()
30        assert t.allTrue(1, 3.0, true)
31        assert not t.allTrue(1, 0, true)
32        assert t.sumInts(1, 2, 3)==6
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