golang check if in array check if element exists in array golang

The solution for “golang check if in array check if element exists in array golang” can be found here. The following code will assist you in solving the problem.

func stringInSlice(a string, list []string) bool {
for _, b := range list {
if b == a {
return true
}
}
return false
}Mostafa has already pointed out that such a method is trivial to write, and mkb gave you a hint to use the binary search from the sort package. But if you are going to do a lot of such contains checks, you might also consider using a map instead.

It’s trivial to check if a specific map key exists by using the value, ok := yourmap[key] idiom. Since you aren’t interested in the value, you might also create a map[string]struct{} for example. Using an empty struct{} here has the advantage that it doesn’t require any additional space and Go’s internal map type is optimized for that kind of values. Therefore, map[string] struct{} is a popular choice for sets in the Go world.

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