On Tue, Feb 12, 2013 at 1:44 PM, Antoine Pitrou <solip...@pitrou.net> wrote:
> It's idiomatic because strings are immutable (by design, not because of > an optimization detail) and therefore concatenation *has* to imply > building a new string from scratch. > Not necessarily. It is totally possible to implement strings such they are immutable and concatenation takes O(1): ropes are the canonical example of this.
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