Characters

In Jade characters are stored in integers. Their read syntax is a question mark followed by the character itself which may be an escape sequence introduced by a backslash. For details of the available escape sequences see section Strings.

?a
    => 97

?\n
    => 10

?\177
    => 127

Function: alpha-char-p character

This function returns t when character is one of the alphabetic characters.

(alpha-char-p ?a)
    => t

Function: upper-case-p character

When character is one of the upper-case characters this function returns t.

Function: lower-case-p character

Returns t when character is lower-case.

Function: digit-char-p character

This function returns t when character is one of the decimal digit characters.

Function: alphanumericp character

This function returns t when character is either an alphabetic character or a decimal digit character.

Function: space-char-p character

Returns t when character is a white-space character (space, tab, newline or form feed).

Function: char-upcase character

This function returns the upper-case equivalent of character. If character is already upper-case or has no upper-case equivalent it is returned unchanged.

(char-upcase ?a)
    => 65                       ;`A'

(char-upcase ?A)
    => 65                       ;`A'

(char-upcase ?!)
    => 33                       ;`!'

Function: char-downcase character

Returns the lower-case equivalent of the character character.

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