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21.4.6 String Modification
These procedures are for modifying strings in-place. This means that the
result of the operation is not a new string; instead, the original string's
memory representation is modified.
| string-set! str k chr
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Scheme Procedure |
| scm_string_set_x (str, k, chr)
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C Function |
|
Store chr in element k of str and return
an unspecified value. k must be a valid index of
str.
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| string-fill! str chr
|
Scheme Procedure |
| scm_string_fill_x (str, chr)
|
C Function |
|
Store char in every element of the given string and
return an unspecified value.
|
| substring-fill! str start end fill
|
Scheme Procedure |
| scm_substring_fill_x (str, start, end, fill)
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C Function |
Change every character in str between start and
end to fill.
(define y "abcdefg")
(substring-fill! y 1 3 #\r)
y
=> "arrdefg"
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| substring-move! str1 start1 end1 str2 start2
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Scheme Procedure |
| scm_substring_move_x (str1, start1, end1, str2, start2)
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C Function |
|
Copy the substring of str1 bounded by start1 and end1
into str2 beginning at position start2.
str1 and str2 can be the same string.
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