From: Matthew Moss <matthew.moss@...>
Date: 2008-09-20T08:43:13+09:00
Subject: [QUIZ] One-Liners Mashup (#177 again)

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The three rules of Ruby Quiz 2:

1.  This week only -- no waiting period!

2.  Support Ruby Quiz 2 by submitting ideas as often as you can! (A
permanent, new website is in the works for Ruby Quiz 2. Until then,
please visit the temporary website at

     <http://splatbang.com/rubyquiz/>.

3.  Enjoy!

Suggestion:  A [QUIZ] in the subject of emails about the problem
helps everyone on Ruby Talk follow the discussion.  Please reply to
the original quiz message, if you can.

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Apologies for being late today... 'twas distracted by my English
report!

## One-Liners Mashup (#177)

This week is going to be very informal, and without any particular
task or submission. It's hunting season, and we're hunting one-liners.

Basically, we'll start with the simple problem I've presented below.
Your solution must fit in one line. (Golfing is okay, but not
necessary. One line *generally* means about 80 chars wide, but we're
flexible here.) If you are writing a method, the `def foo(args)` and
`end` (and `class Whatever` and `end` for adding methods to a class)
doesn't count... the body of the method will.

Of course, your solutions should be generally useful, and not hard-
coded to solve any particular example used to illustrate what the
solution should do.

Post your solution AND a followup problem for others to solve. Repeat
ad nauseum (or until about Wed/Thu).

Ready? Here goes. First problem...
You should know this pattern well:

    > [:one, "two", 4] * 3
    => [:one, "two", 4, :one, "two", 4, :one, "two", 4]

Write a single line method on Array that does this instead:

    > [:one, "two", 4].repeat(3)
    => [:one, :one, :one, "two", "two", "two", 4, 4, 4]