On Tue, Jul 24, 2012 at 10:37:47PM +0200, Brice Figureau wrote:
> On 24/07/12 22:30, Matthew Probst wrote:
> > Actually, I had it _that_ way before I tried the ways I posted
> > previously, in imitation of the exact same code. But, to make sure I
> > wasn't just messing it up, I went ahead and tried it again with this code:
> >
> > # subpaths.rb
> > #
> > module Puppet::Parser::Functions
> > newfunction(:subpaths, :type => :rvalue) do |args|
all arguments that you pass to your custom function are now represented
by args. So if you call your function like
subpaths('foo', 'bar')
args will ['foo', 'bar']. If you call your function like
subpaths(['foo', 'bar'])
then you really just pass one argument to your function, so args[0] is
['foo', 'bar'] and args = [['foo', 'bar']]
> > args = [args] unless args.is_a?(Array)
> > args.each do |path|
if you called your function like subpaths(['foo', 'bar']) then your
first temp_path will be the array ['foo', 'bar']
> > temp_path = path
> > begin
> > result << temp_path
> > temp_path = File.dirname(temp_path)
File.dirname fails if you pass an array with "can't convert Array into
String"
> > end while (temp_path != "/" and temp_path != ".")
> > end
> > return result.uniq
result is only valid inside your args.each block.
> > end
> > end
> >
I hope this helps understanding why this failed. In your last (working
example) you first extracted the first argument with arguments[0] and you
define result outside the each block.
-Stefan
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