Re: printf numification

Are you sure "%4.4d" is legal? (Update: perlfunc says it's only legal for floating point formatters.) Using a proper formatting string, it works fine for me in ActivePerl 5.6.1 build 633:

>perl -le "printf('%04d', '42a');"
0042
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Re^2: printf numification by YuckFoo (Abbot) on Sep 27, 2004 at 18:28 UTC
My take on the docs is that '%4.4d' is legal. Maybe not the most straight forward way, but legal. I think I regularly abuse it this way, a mental hangover from the 's' format I think. Anyway, no matter, '%04d' doesn't numify here either. Yuck%4.4d Update: From perldoc -f sprintf: `Perl permits the following universally-known flags between the "%" and the conversion letter: space prefix positive number with a space + prefix positive number with a plus sign - left-justify within the field 0 use zeros, not spaces, to right-justify # prefix non-zero octal with "0", non-zero hex with "0x" number minimum field width .number "precision": digits after decimal point for floating-point, max length for string, minimum length for integer` [download]	[reply] [d/l]

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Re^2: printf numification
by YuckFoo (Abbot) on Sep 27, 2004 at 18:28 UTC

Anyway, no matter, '%04d' doesn't numify here either.

Yuck%4.4d

Update: From perldoc -f sprintf:

Perl permits the following universally-known flags
between the "%" and the conversion letter:

   space   prefix positive number with a space
   +       prefix positive number with a plus sign
   -       left-justify within the field
   0       use zeros, not spaces, to right-justify
   #       prefix non-zero octal with "0", non-zero hex with "0x"
   number  minimum field width
   .number "precision": digits after decimal point for
           floating-point, max length for string, minimum length
           for integer
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