From: Brian Candler <b.candler@...>
Date: 2009-08-10T17:43:42+09:00
Subject: Re: Generate binary sequences of length n?

Robert Dober wrote:
> (1<<n).times.map{ | d | "%0{n}b" % d }

Perhaps safer to avoid the interpolation in the format string, using '*' 
to give the number of digits.

>> "%0*b" % [8,123]
=> "01111011"
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