On Friday, 10 December 2021 at 18:47:53 UTC, Stanislav Blinov
wrote:
Threshold could be relative for short strings and absolute for
long ones. Makes little sense reallocating if you only waste a
couple bytes, but makes perfect sense if you've just removed
pages and pages of semicolons ;)
Scanning short strings twice is not all that expensive as they
will stay in the CPU cache when you run over them a second time.
```
import std.stdio;
@safe:
string stripsemicolons(string s) @trusted {
int i,n;
foreach(c; s) n += c != ';'; // premature optimization
auto r = new char[](n);
foreach(c; s) if (c != ';') r[i++] = c;
return cast(string)r;
}
int main() {
writeln(stripsemicolons("abc;def;ab"));
return 0;
}
```
