Re: Re: (Golf) Formatting Integer To Money

[dpuu]

49 Characters:

sub a{$_=sprintf"%.2f",pop;while(s/\B\d{3}\b/,$&/){}$_}

Update: 48 characters:

sub a{$_=sprintf"%.2f",pop;{s/\B\d{3}\b/,$&/&&redo}$_}

--Dave

[thelenm]

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

--
just,my${.02}

[larryk]

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.

   larryk                                          
perl -le "s,,reverse killer,e,y,rifle,lycra,,print"