Method InsertNode

structure/zset.go:945–972

InsertNode is a method on the FZSet structure. It inserts a new node or updates an existing node in the skip list and the dictionary. It takes three parameters: score (an integer), key (a string), and value (of any interface type). If key already exists in the dictionary and the score equals the ex

(score int, member string, value interface{})

// to the dictionary, increments the size of the dictionary by 1, and also adds
// the node to the skip list.
func (fzs *FZSet) InsertNode(score int, member string, value interface{}) error {
	// Instantiate dictionary if it's not already
	if fzs.dict == nil {
		fzs.dict = make(map[string]*ZSetValue)
	}
	if fzs.skipList == nil {
		fzs.skipList = newSkipList()
	}

	// Check if key exists in dictionary
	if v, ok := fzs.dict[member]; ok {
		if v.score != score {
			// Update value and score as the score remains the same
			fzs.skipList.delete(score, member)
			fzs.dict[member] = fzs.skipList.insert(score, member, value)
		} else {
			// Ranking isn't altered, only update value
			v.value = value
		}
	} else { // Key doesn't exist, create new key
		fzs.dict[member] = fzs.skipList.insert(score, member, value)
		fzs.size++ // Increase size count by 1
		// Node is also added to the skip list
	}

	// Returns nil as no specific error condition is checked in this function
	return nil
}
func (zs *ZSetStructure) adjustMinMax(zSet *FZSet, min int, max int) (adjustedMin int, adjustedMax int, err error) {
	if min > max {
		return min, max, ErrInvalidArgs