3 ms·
The most appropriate behavior is implemented by regex. Find the empty string and replace with say `($&)` where `$&` refers to the captured variable, a
by arithma 3y ago
The most appropriate behavior is implemented by regex.
Find the empty string and replace with say
`($&)`
where
`$&`
refers to the captured variable, and with input
`xyz`,
the result is
`()x()y()z()`
With an empty input, the result is
`()`.
The result of indexOf can consistently return the first index of the first half open subrange in a string. It just so happens that the first subrange of an empty string in an empty string is [0, 0).
The limiting case is also an interesting way to look at it:
()a()b()c()
()a()b()
()a()
()