79 lines
2.0 KiB
Plaintext
79 lines
2.0 KiB
Plaintext
This file documents names specified in stringhax.scm.
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NOTES
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stringhax.scm provides several string-hacking procedures.
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DEFINITIONS AND DESCRIPTIONS
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procedure
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string-map procedure string --> string
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Does a 'map' on each character of STRING and returns the result, a
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newly allocated string. PROCEDURE takes a character and should return
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a character.
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procedure
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downcase-string string --> string
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upcase-string string --> string
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Do what you expect: converts STRING to downcase or upcase
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respectively, using char-downcase or char-upcase respectively. The
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result is a newly allocated string.
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procedure
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char-set-index string char-set [start] --> number
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char-set-rindex string char-set [start] --> number
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Returns the index of the first character that is in
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char-set. char-set-index searches from left to r0.6/scsh/lib/char-package.scmight, char-set-rindex
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from right to left. START is the index from where to start from and
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defaults to 0 in char-set-index and (string-length STRING) in
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char-set-rindex. If the search fails, #f is returned.
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procedure
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string-reduce default construct string --> string
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Does a "fold-right" on string. The resulting string is
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(CONSTRUCT ... (CONSTRUCT STRING[n-1] (CONSTRUCT STRING[n] DEFAULT)) ...)
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Example:
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(string-reduce "" (lambda (char str)
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(string-append str (string (char-downcase char))))
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"DOWNCASE")
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==> "downcase"
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procedure
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string-prefix? prefix string --> boolean
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string-suffix? suffix string --> boolean
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Return #t if PREFIX/SUFFIX is a real prefix/suffix of STRING,
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otherwise return #f. Real prefix/suffix means that STRING may not be a
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prefix/suffix of PREFIX/SUFFIX.
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procedure
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skip-whitespace string --> number
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Returns the index of the first character in STRING that is not a
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whitespace (as defined in char-set:whitespace). If there isn't such a
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character, #f is returned.
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procedure
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trim-spaces string --> string
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Returns a newly allocated string being STRING without leading or
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trailing spaces (not whitespaces!). |