Remove element method not working in Golang

php editor Banana will introduce you to the method of deleting elements in Golang. In Golang, the way to delete elements is not as straightforward as in other programming languages, but we can achieve it with some tricks. In this article, we will explore several common methods to help you easily delete elements in Golang and improve programming efficiency. Whether you are a beginner or an experienced developer, these methods will help you. Let’s find out together!

Question content

I have a simple code for removing elements from a slice:

package main

import "fmt"

func main() {
    values := []string{"1", "2", "3", "4", "5"}
    valuesresult := removeelementbyindex(values2, 0)
    fmt.printf("%v - %v\n", values, valuesresult)
}

func removeelementbyindex[t interface{}](a []t, i int) []t {
    return append(a[:i], a[i+1:]...)
}

But the output is

[2 3 4 5 5] - [2 3 4 5]

For some reason values is changing but I'm not changing it in my method (I guess). Please help me fix this

Workaround

You did change the original slice. If the result of the append operation fits within the capacity of the slice, the append operation will use the original slice.

If you need the original slice unchanged:

func removeElementByIndex[T interface{}](a []T, i int) []T {
    result := make([]T, len(a)-1)
    copy(result,a[:i])
    copy(result[i:],a[i+1:])
    return result
}

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