The HasPrintable(s) command determines whether s has any printable characters. Printable characters are identified by the predicate IsPrintable.

If s contains a printable character, then HasPrintable returns true. Otherwise, false is returned.

All of the StringTools package commands treat strings as (null-terminated) sequences of $8$-bit (ASCII) characters.  Thus, there is no support for multibyte character encodings, such as unicode encodings.

The StringTools[HasPrintable] command is thread-safe as of Maple 15.

For more information on thread safety, see index/threadsafe.

$\mathrm{with}\left(\mathrm{StringTools}\right)\:$

s := Iota( 1, 255 ):

$\mathrm{HasPrintable}\left(s\right)$

$\mathrm{true}$

$\mathrm{IsPrintable}\left(s\right)$

$\mathrm{false}$

$\mathrm{HasPrintable}\left(\mathrm{Select}\left(\mathrm{IsPrintable}\,s\right)\right)$

$\mathrm{true}$

$\mathrm{HasPrintable}\left(\mathrm{Remove}\left(\mathrm{IsPrintable}\,s\right)\right)$

$\mathrm{false}$

The StringTools[HasPrintable] command was updated in Maple 2017.