-
-
Save podhmo/1139673 to your computer and use it in GitHub Desktop.
cddddddddr
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
class Array | |
def car | |
first | |
end | |
def cdr | |
clone.tap { |r| r.delete_at 0 } | |
end | |
def method_missing(name, *args) | |
if name.to_s =~ /:?c(d+)r/ | |
self.class.class_eval(<<DEFINE) | |
def #{name} | |
self[#{$1.length}..-1] | |
end | |
DEFINE | |
self.send(name) | |
else | |
super | |
end | |
end | |
end | |
require "test/unit" | |
class T < Test::Unit::TestCase | |
def test_car | |
assert_equal(0, [0,1,2,3].car) | |
end | |
def test_cdr | |
assert_equal([1,2,3],[0,1,2,3].cdr) | |
end | |
def test_cdddr | |
assert_equal([3],[0,1,2,3].cdddr) | |
end | |
end |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
ruby久しぶり。テストとメソッドのキャッシュを追加してみた。
cadadrとかやろうとするとこのままじゃ辛いけど。