Any ideomatic way of inserting a String at a speci...

# getting-started

[dave08]

Any ideomatic way of inserting a String at a specific position in another string?

[karelpeeters]

I think you're stuck with substring and +.

[dave08]

Currently using replace, even though I know the exact position I need... 😛. Maybe two substrings are more efficient? This is for an api that constantly gets hit.

[karelpeeters]

Yeah definitely do substrings.

[karelpeeters]

Or maybe StringBuilder(string) and then insert

[dave08]

I was thinking of replaceRange, but then I'd do 5..5?

[dave08]

The extra allocation of a StringBuilder is worth it?

[karelpeeters]

I'm not sure, if it really matters that much you need to benchmark it.

[Shawn]

ooc what does the substring implementation look like? my first guess was to just use take and takeLast but maybe I’m not taking something important into account

[dave08]

Yup the replaceRange seems to work... I wonder if it has the same overhead as replace... the only thing is one has to remeber to re-add the replaced character...

[karelpeeters]

Surely the range one is faster since it doesn't need to search the string?

[dave08]

Probably... In my current Ktor project I can't ctrl-click it... I guess I'll have to look it up after I finish with this task.

I guess this is too much of an edge-case to have an insertAt(position: Int, stringToInsert: String) in the stdlib.... thanks anyways!