Selectively replace multiple instances of a character within a string: Difference between revisions
Selectively replace multiple instances of a character within a string (view source)
Revision as of 04:59, 17 May 2023
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'aABaCD' chg 'bEb' chg 'rrF' chg 'abracadabra'
AErBcadCbFD</syntaxhighlight>
=={{header|Java}}==
{{trans|JavaScript}}
Here's an example translated from JavaScript.
<syntaxhighlight lang="java">
int findNth(String s, char c, int n) {
if (n == 1) return s.indexOf(c);
return s.indexOf(c, findNth(s, c, n - 1) + 1);
}
String selectiveReplace(String s, Set... ops) {
char[] chars = s.toCharArray();
for (Set set : ops)
chars[findNth(s, set.old, set.n)] = set.rep;
return new String(chars);
}
record Set(int n, char old, char rep) { }
</syntaxhighlight>
<syntaxhighlight lang="java">
selectiveReplace("abracadabra",
new Set(1, 'a', 'A'),
new Set(2, 'a', 'B'),
new Set(4, 'a', 'C'),
new Set(5, 'a', 'D'),
new Set(1, 'b', 'E'),
new Set(2, 'r', 'F'));
</syntaxhighlight>
{{out}}
<pre>AErBcadCbFD</pre>
=={{header|JavaScript}}==
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