strings.Replacer：位置相关的错误/功能？

I get the output:

Hello World
Hello 

With the following code:

package main

import(
    "fmt"
    "strings"
)

func main(){
    s := "Hello World"
    fmt.Println(strings.NewReplacer("Hello","").Replace(s))
    fmt.Println(strings.NewReplacer("World","").Replace(s))
}

Is this a bug? Is there a better way to remove substrings?

I'm no go expert, but it looks like a bug to me.

This works:

package main

import(
    "fmt"
    "strings"
)

func main(){
    s := "Hello World"
    fmt.Println(strings.NewReplacer("Hello"," ").Replace(s))
    fmt.Println(strings.NewReplacer("World","").Replace(s))
}

Output:

   World 

Hello

Maybe there is an empty string keyword?

Even this works:

fmt.Println(strings.NewReplacer("ello", "").Replace(s))

This also works:

fmt.Println(strings.NewReplacer("Hello","", "Hi", "").Replace(s))

As orthopteroid mentioned, it seems single-replacement is special cased and buggy.

This was a bug. It is now fixed in tip.

https://groups.google.com/forum/#!topic/golang-nuts/CNdpwbCSbHM

And here is another way to remove substrings:

package main

import (
    "fmt"
    "strings"
)

func main() {
    fmt.Println(strings.Replace("Hello World", "Hello", "", 1))
}