'strings.split'可以忽略空令牌吗？

Question

Can you please demonstrate an efficient way to use strings.split such that empty tokens are not included in the returned slice?

Specifically, the following code returns ["a" "" "b" "c"] where I want to have it return ["a" "b" "c"]:

fmt.Printf("%q
", strings.Split("a,,b,c", ","))

https://play.golang.org/p/keaSjjSxgn

Answer 1

Short answer: strings.Split can't do that.

However, there are more functions to split strings in Go. Notably, you can do what you want with strings.FieldsFunc. The example here:

splitFn := func(c rune) bool {
        return c == ','
}
fmt.Printf("Fields are: %q
", strings.FieldsFunc("a,,b,c", splitFn))

In the playground: https://play.golang.org/p/Lp1LsoIxAK