<p><span class="h-card" translate="no"><a href="https://mastodon.social/@whitequark" class="u-url mention">@<span>whitequark</span></a></span> borrow worries me because many uses of an index stop working with a borrow. For example, what if you want two indices so you can interate over the string twice. Ofc the index idea only works if you can prevent the string from being mutated…</p>