Returns true if ch
is a ASCII letter (a-z, A-Z).
Returns true if `ch` is a ASCII letter (a-z, A-Z).
Returns true if ch
is a ASCII lower-case letter (a-z).
Returns true if `ch` is a ASCII lower-case letter (a-z).
Returns true if ch
is a ASCII upper-case letter (A-Z).
Returns true if `ch` is a ASCII upper-case letter (A-Z).
Returns true if ch
is a control character.
Returns true if `ch` is a control character.
Returns true if ch
is a decimal digit (0-9).
Returns true if `ch` is a decimal digit (0-9).
Returns true if ch
is a hexadecimal digit (0-9, a-f, A-F).
Returns true if `ch` is a hexadecimal digit (0-9, a-f, A-F).
Returns true if ch
is a Unicode letter.
Returns true if `ch` is a Unicode letter.
Returns true if ch
is a Unicode lower-case letter.
Returns true if `ch` is a Unicode lower-case letter.
Returns true if ch
is an octal digit (0-7).
Returns true if `ch` is an octal digit (0-7).
(pred x)
Coerce x
to a character predicate.
Coerce `x` to a character predicate.
Returns true if ch
is a common whitespace character: space, tabulator,
newline or carriage return.
Returns true if `ch` is a common whitespace character: space, tabulator, newline or carriage return.
(test pred ch)
Tests ch
against the character predicate pred
.
Tests `ch` against the character predicate `pred`.
Returns true if ch
is a Unicode space character (any space separator,
line separator, or paragraph separator).
Returns true if `ch` is a Unicode space character (any space separator, line separator, or paragraph separator).
Returns true if ch
is a Unicode upper-case letter.
Returns true if `ch` is a Unicode upper-case letter.
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