Leetcode 1773

1773. Count Items Matching a Rule

The idea of this solution is pretty simple. We know that the array items has only 3 items. The first one is the ruleKey = "type" the next one is ruleKey = "color", and the next one is ruleKey = "name". We just have to set a index of each item to either 0, 1 or 2. Then just loop over each item and check whether the item[index] == ruleValue.

func countMatches(items [][]string, ruleKey string, ruleValue string) int {
	res := 0
	index := 0
	if ruleKey == "color" {
		index = 1
	} else if ruleKey == "name" {
		index = 2
	}

	for _, item := range items {
		if item[index] == ruleValue {
			res++
		}
	}
	
	return res
}