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#! /usr/bin/ruby
require 'test/unit'
def commonpath(p)
pa = []
pl = []
p.each do |sp|
q = sp.split("/")
pl.push(q.length)
pa.push(q)
end
out = []
0.upto(pl.min-1).each do |cl|
ex = false
tx = pa[0][cl]
pa.each do |pe|
if pe[cl] != tx then
ex = true
break
end
end
if ex then
break
end
out.push(tx)
end
return out.join("/")
end
class TestCommonpath < Test::Unit::TestCase
def test_ex1
assert_equal("/a/b/c", commonpath([
"/a/b/c/1/x.pl",
"/a/b/c/d/e/2/x.pl",
"/a/b/c/d/3/x.pl",
"/a/b/c/4/x.pl",
"/a/b/c/d/5/x.pl"
]))
end
end
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