Nyquist / XLISP 2.0 -
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alphanumericp
Type: |
- |
predicate function (subr) |
Source: |
- |
xlstr.c |
Syntax
- (alphanumericp char)
- char - a character expression
returns - T if the character
is alphabetic or a digit, NIL otherwise
Description
The 'alphanumericp' function checks if the 'char' expression is an
alphabetic or a digit character. If 'char' is an alphabetic
[either an upper or lower case] or a digit character,
T is returned, otherwise
NIL is returned. Note that XLISP is limited to
ASCII characters, so there is no way
to find out if an Unicode character with a
char-code greater than
ASCII 127 is alphanumeric or not.
Examples
(alphanumericp #\A) => T
(alphanumericp #\a) => T
(alphanumericp #\1) => T
(alphanumericp #\[) => NIL
See also:
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Nyquist / XLISP 2.0 -
Contents |
Tutorials |
Examples |
Reference