How to check if a slice has a given index in Go?
We can easily do that with maps:
item, ok := myMap["index"]
But not with slices:
item, ok := mySlice[3] // panic!
Surprised this wasn't asked before. Maybe I'm on the wrong mental model with Go slices?
There is no sparse slices in Go, so you could simply check the length:
if len(mySlice) > 3 {
// ...
}
If the length is greater than 3, you know that the index 3 and all those before that exist.