1773. Count Items Matching a Rule

#### QUESTION:

You are given an array items, where each items[i] = [typei, colori, namei] describes the type, color, and name of the ith item. You are also given a rule represented by two strings, ruleKey and ruleValue.

The ith item is said to match the rule if one of the following is true:

ruleKey == “type” and ruleValue == typei. ruleKey == “color” and ruleValue == colori. ruleKey == “name” and ruleValue == namei. Return the number of items that match the given rule.

Example 1:

``````Input: items = [["phone","blue","pixel"],["computer","silver","lenovo"],["phone","gold","iphone"]], ruleKey = "color", ruleValue = "silver"
Output: 1
Explanation: There is only one item matching the given rule, which is ["computer","silver","lenovo"].
``````

Example 2:

``````Input: items = [["phone","blue","pixel"],["computer","silver","phone"],["phone","gold","iphone"]], ruleKey = "type", ruleValue = "phone"
Output: 2
Explanation: There are only two items matching the given rule, which are ["phone","blue","pixel"] and ["phone","gold","iphone"]. Note that the item ["computer","silver","phone"] does not match.
``````

Constraints:

``````1 <= items.length <= 104
1 <= typei.length, colori.length, namei.length, ruleValue.length <= 10
ruleKey is equal to either "type", "color", or "name".
All strings consist only of lowercase letters.
``````

#### SOLUTION:

``````class Solution {
fun countMatches(items: List<List<String>>, ruleKey: String, ruleValue: String): Int {
var typeIndex = arrayOf("type","color","name")
var result = 0
for (item in items) {
if (item.get(typeIndex.indexOf(ruleKey)).equals(ruleValue)) result++
}
return result
}
}
``````
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