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Re: Re: Re: (Golf) Formatting Integer To Money

by thelenm (Vicar)
on Aug 29, 2002 at 18:45 UTC ( [id://193853]=note: print w/replies, xml ) Need Help??

in reply to Re: Re: (Golf) Formatting Integer To Money
in thread (Golf) Formatting NumberTo Money

Here's a 44 with a few small improvements to yours:
sub a{$_=sprintf"%.2f",@_;1while s/\B...\D/,$&/;$_}
It seems that the sprintf solutions fail sometimes in rounding, e.g. "123456789012345.125" becomes "123,456,789,012,345.12" instead of "123,456,789,012,345.13".

Update: I was just informed by thospel++ that IEEE rounding is toward even, not upward. That explains the behavior, though I'm not sure if it's the desired behavior for this problem.

-- Mike


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Re: Re: Re: Re: (Golf) Formatting Integer To Money
by larryk (Friar) on Aug 29, 2002 at 20:55 UTC
    Actually, this is the expected rounding. If you think about it, only half of them should round up (and the other half down) since that will give a more accurate average. In this case .125 rounds down, if you try .135 it will round up and .145 will round down.
    perl -le "s,,reverse killer,e,y,rifle,lycra,,print"

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