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titanous/gist:430430

Created June 8, 2010 18:20
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gistfile1.builder
def mask n;n[0,6]+'*'*(n.size-10)+n[-4,4]end
@pritchie
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pritchie commented Jun 9, 2010

But what about strings smaller than 10 characters?

http://gist.github.com/430895

@titanous
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titanous commented Jun 9, 2010

This is an entry to the Braintree RailsConf Code Golf competition[1]. Credit Card numbers aren't shorter than 10 characters[2].

1 http://codegolf.getbraintree.com/
2 http://en.wikipedia.org/wiki/Bank_card_number#IIN_Ranges_Allocated_to_Issuing_Networks

@pritchie
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pritchie commented Jun 9, 2010

Ouch, in that case all that checking is quite sub-optimal then isn't it?

How about: http://gist.github.com/431442 ?

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titanous commented Jun 9, 2010

Very nicely done.

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pritchie commented Jun 9, 2010

Thanks, working on that was a great way to wake myself up this morning.

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