Package g1701_1800.s1773_count_items_matching_a_rule

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    1773 - Count Items Matching a Rule\.

    Easy

    You are given an array items, where each <code>itemsi = type<sub>i</sub>, color<sub>i</sub>, name<sub>i</sub></code> describes the type, color, and name of the <code>i<sup>th</sup></code> item. You are also given a rule represented by two strings, ruleKey and ruleValue.

    The <code>i<sup>th</sup></code> item is said to match the rule if one of the following is true:

    • ruleKey == "type" and <code>ruleValue == type<sub>i</sub></code>.

    • ruleKey == "color" and <code>ruleValue == color<sub>i</sub></code>.

    • ruleKey == "name" and <code>ruleValue == name<sub>i</sub></code>.

    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:

    • <code>1 <= items.length <= 10<sup>4</sup></code>

    • <code>1 <= type<sub>i</sub>.length, color<sub>i</sub>.length, name<sub>i</sub>.length, ruleValue.length <= 10</code>

    • ruleKey is equal to either "type", "color", or "name".

    • All strings consist only of lowercase letters.

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description

    • Field Summary

      Fields 
      Modifier and Type Field Description

    • Constructor Summary

      Constructors 
      Constructor Description
      Solution()

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description

    • Method Summary

      Modifier and Type Method Description
      final Integer countMatches(List<List<String>> items, String ruleKey, String ruleValue)

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait