The HasBinaryDigit(s) command determines whether s has a binary digit. A character is a binary digit if it is one of "0" or "1".

If s has a binary digit, HasBinaryDigit returns true. Otherwise, false is returned.

The HasHexDigit(s) command determines whether s has a hexadecimal digit. A character is a hexadecimal digit if it is  one of the characters

If s has a hexadecimal digit, HasHexDigit returns true. Otherwise, false is returned.

The HasOctalDigit(s) command determines whether s has an octal digit. A character is an octal digit if it is one of the characters

If s has an octal digit, HasOctalDigit 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[HasBinaryDigit], StringTools[HasHexDigit] and StringTools[HasOctalDigit] commands are thread-safe as of Maple 15.

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

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

$\mathrm{HasBinaryDigit}\left(''abcde234''\right)$

$\mathrm{false}$

$\mathrm{HasOctalDigit}\left(''abcde''\right)$

$\mathrm{false}$

$\mathrm{HasHexDigit}\left(''abcde''\right)$

$\mathrm{true}$