Hi All,
$:.unshift File.join(File.dirname(FILE), *%w[… lib])
what does *%w mean in the line above?
Thanks for the help
the curious one
Hi All,
$:.unshift File.join(File.dirname(FILE), *%w[… lib])
what does *%w mean in the line above?
Thanks for the help
the curious one
William Djingga wrote:
Hi All,
$:.unshift File.join(File.dirname(FILE), *%w[… lib])
what does *%w mean in the line above?
%w[… lib] creates an array of words. The result is ["…", “lib”]. The
asterisk causes the array elements to be passed as separate arguments to
File.dirname. It’s exactly equivalent to this (except it’s harder to
understand):
$:.unshift File.join(File.dirname(FILE), “…”, “lib”)
Hi,
Am Dienstag, 21. Jul 2009, 23:39:38 +0900 schrieb William Djingga:
$:.unshift File.join(File.dirname(FILE), *%w[… lib])
what does *%w mean in the line above?
An array expands to an argument list.
%w() is just an array:
%w[foo bar baz] == [ “foo”, “bar”, “baz”]
Here is an example for an *argument list.
def f a, b, *args
puts args.inspect
end
f( :x, :y, “i”, “j”)
ary = [“foo”, “bar”]
f( :x, :y, *ary)
So the call will expand to
$:.unshift File.join(File.dirname(FILE), “…”, “lib”)
These will work as well:
ary = %w(a b c)
[ “foo”, “bar”, *ary] #=> [“foo”, “bar”, “a”, “b”, “c”]
case somestr
when *ary then do_sth
when *%w(quit exit bye) then break
end
Bertram
On Wed, 22 Jul 2009 00:11:50 +0900, Tim H. wrote:
understand):
$:.unshift File.join(File.dirname(FILE), “…”, “lib”)
Which just comes to show you can write perl in any language.
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