1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
<RefEntry id="trim-string">
<!-- This file is generated automatically from the DSSSL source. -->
<!-- Do not edit this file! -->
<?html-filename trim-string.html>
<RefMeta>
<RefEntryTitle>trim-string</RefEntryTitle>
<RefMiscInfo Role="file">dblib.dsl</RefMiscInfo>
</RefMeta>
<RefNameDiv>
<RefName>trim-string</RefName>
<RefPurpose>Trims the tail off of a string</RefPurpose>
</RefNameDiv>
<RefSynopsisDiv><Title>Synopsis</Title>
<Synopsis>
(trim-string str string-list)
</Synopsis>
</RefSynopsisDiv>
<RefSect1><Title>Description</Title>
<para>
If <literal>str</literal> ends with any of the strings in <literal>string-list</literal>, trim that
string off and return the base string.
E.g., <literal>(trim-string "filename.sgm" </literal>(".sgm" ".xml" ".sgml"))
returns "filename".</para>
</RefSect1>
<RefSect1><Title>Author</Title>
<para>
Norman Walsh, <ndw@nwalsh.com>
</para>
</RefSect1>
<RefSect1><Title>Source Code</Title>
<ProgramListing>
(define (trim-string str string-list)
;; Trims the tail off of a string
(let ((strlen (string-length str)))
(let loop ((sl string-list))
(if (null? sl)
str
(if (equal?
(substring str (- strlen (string-length (car sl))) strlen)
(car sl))
(substring str 0 (- strlen (string-length (car sl))))
(loop (cdr sl)))))))
</ProgramListing>
</RefSect1>
</RefEntry>
|
