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 06:14, 20 July 2022
, 1 year agoAdd JavaScript
(Python: alternative) |
(Add JavaScript) |
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Line 160:
'aABaCD' chg 'bEb' chg 'rrF' chg 'abracadabra'
AErBcadCbFD</lang>
=={{header|JavaScript}}==
<lang javascript>function findNth(s, c, n) {
if (n === 1) return s.indexOf(c);
return s.indexOf(c, findNth(s, c, n - 1) + 1);
}
function selectiveReplace(s, ops) {
const chars = Array.from(s);
for ([n, old, rep] of ops) {
chars[findNth(s, old, n)] = rep;
}
return chars.join("");
}
console.log(
selectiveReplace("abracadabra", [
[1, "a", "A"], // the first 'a' with 'A'
[2, "a", "B"], // the second 'a' with 'B'
[4, "a", "C"], // the fourth 'a' with 'C'
[5, "a", "D"], // the fifth 'a' with 'D'
[1, "b", "E"], // the first 'b' with 'E'
[2, "r", "F"], // the second 'r' with 'F'
])
);
</lang>
{{out}}
<pre>
AErBcadCbFD
</pre>
=={{header|Julia}}==
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