在Go中从切片中删除字符串[重复]

Question

This question already has an answer here:

• Delete element in a slice 6 answers

I have a slice of strings, and I want to remove a specific one.

strings := []string
strings = append(strings, "one")
strings = append(strings, "two")
strings = append(strings, "three")

Now how can I remove the string "two" from strings?

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Answer 1

Find the element you want to remove and remove it like you would any element from any other slice.

Finding it is a linear search. Removing is one of the following slice tricks:

a = append(a[:i], a[i+1:]...)
// or
a = a[:i+copy(a[i:], a[i+1:])]

Here is the complete solution (try it on the Go Playground):

s := []string{"one", "two", "three"}

// Find and remove "two"
for i, v := range s {
    if v == "two" {
        s = append(s[:i], s[i+1:]...)
        break
    }
}

fmt.Println(s) // Prints [one three]

If you want to wrap it into a function:

func remove(s []string, r string) []string {
    for i, v := range s {
        if v == r {
            return append(s[:i], s[i+1:]...)
        }
    }
    return s
}

Using it:

s := []string{"one", "two", "three"}
s = remove(s, "two")
fmt.Println(s) // Prints [one three]