package arr

import "joybuywork/internal/consts"

// NotExistAppend 不存在就数组里面就追加
func NotExistAppend[T consts.NormalType](source, adds []T) []T {

	if len(source) == 0 {
		return adds
	}

	if len(adds) == 0 {
		return source
	}

	var data = make(map[T]struct{}, len(source))
	for _, v := range source {
		data[v] = struct{}{}
	}

	for _, v := range adds {
		if _, ok := data[v]; !ok {
			source = append(source, v)
		}
	}

	return source
}