If I have a String, and I want to reuse it, currently I do
// s is a mut String
s.truncate();
s.push_str(a_str);
Is this the best/most efficient way to do it? I also looked at replace_range(.., a_str)
.
EDIT: s.truncate()
is incorrect, it should say s.truncate(0)
.
vitalyd
2
s.clear();
s.push_str(a_str);
is what I'd use. replace_range
is more flexible but I'd expect it to run slower than the above.
3 Likes
This looks like the exact use case of clone_into()
. Unfortunately, people aren't happy with the way this method looks and it'll need a champion to get stabilized.
2 Likes