Subj : printf and color codes
To   : Nightfox
From : Digital Man
Date : Mon Jan 21 2013 11:48 pm

  Re: printf and color codes
  By: Nightfox to Digital Man on Sun Jan 20 2013 06:14 pm

 > Hi DM -
 >
 > I'm not sure if this is a bug or is intentional, but the JavaScript printf
 > function doesn't seem to account for color codes (or perhaps non-printable
 > characters in general) when printing strings with a specific field length.
 > For instance:
 >
 > var name = "Bob Smith";
 > printf("%-25s", name);
 >
 > That prints "Bob Smith" in a field with 25 characters as you'd expect, but
 > if the string has any non-printable characters in it, each non-printable
 > character subtracts 1 from the field length when the string is printed out.
 > CTRL-A color codes have this effect when used with printf.

Being a C programmer, that's the behavior I would expect. There's no special 
Ctrl-A code handling in the format/printf functions. You can use 
console.strlen() to calculate the number of *printable* characters in a string 
(excluding Ctrl-A codes) and use that to pad your console output with spaces if 
you wish.

                                            digital man

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