Ctype / isprint?

ruby-talk
1

Hi,

what's the best way to check whether a String consists of printable
characters only? (In C: isprint from ctype)

Maybe would be nice to have the ctype classes as patterns in the
regular expressions.

regards
Hadmut

2

Hi Hadmut,

what's the best way to check whether a String consists of
printable characters only? (In C: isprint from ctype)

Maybe would be nice to have the ctype classes as patterns
in the regular expressions.

It's your lucky day:

   "a b c" =~ /\A[[:print:]]*\z/ #=> 0

   "a \0 c" =~ /\A[[:print:]]*\z/ #=> nil

···

--
Daniel Brockman <daniel@brockman.se>

    So really, we all have to ask ourselves:
    Am I waiting for RMS to do this? --TTN.

3

Hadmut Danisch wrote:

Hi,

what's the best way to check whether a String consists of printable
characters only? (In C: isprint from ctype)

Maybe would be nice to have the ctype classes as patterns in the
regular expressions.

regards
Hadmut

See also: http://rubyforge.org/projects/ctype/

Regards,

Dan

4

is that locale senstive?

-a

···

On Thu, 28 Jul 2005, Daniel Brockman wrote:

Hi Hadmut,

what's the best way to check whether a String consists of
printable characters only? (In C: isprint from ctype)

Maybe would be nice to have the ctype classes as patterns
in the regular expressions.

It's your lucky day:

  "a b c" =~ /\A[[:print:]]*\z/ #=> 0

  "a \0 c" =~ /\A[[:print:]]*\z/ #=> nil

--

email :: ara [dot] t [dot] howard [at] noaa [dot] gov
phone :: 303.497.6469
My religion is very simple. My religion is kindness.
--Tenzin Gyatso

===============================================================================

5

Daniel Brockman wrote:

It's your lucky day:

   "a b c" =~ /\A[[:print:]]*\z/ #=> 0

   "a \0 c" =~ /\A[[:print:]]*\z/ #=> nil

Great, thanks.

(I should start to read the manual...)

Hadmut

6

Hi,

In message "Re: ctype / isprint ?"

  "a b c" =~ /\A[[:print:]]*\z/ #=> 0

  "a \0 c" =~ /\A[[:print:]]*\z/ #=> nil

is that locale senstive?

1.8 regex uses C ctype macros, so that it is locale sensitive.
Oniguruma (1.9 regex engine) does not use locales. It uses encoding
information, since C locale model is just not suitable to handle
multiple encoding schemes in a program, like Oniguruma does.

              matz.