https://leetcode-cn.com/problems/count-items-matching-a-rule/
难度简单14
给你一个数组 items ,其中 items[i] = [typei, colori, namei] ,描述第 i 件物品的类型、颜色以及名称。
另给你一条由两个字符串 ruleKey 和 ruleValue 表示的检索规则。
如果第 i 件物品能满足下述条件之一,则认为该物品与给定的检索规则 匹配 :
ruleKey == "type"且ruleValue == typei。ruleKey == "color"且ruleValue == colori。ruleKey == "name"且ruleValue == namei。
统计并返回 匹配检索规则的物品数量 。
示例 1:
输入:items = [["phone","blue","pixel"],["computer","silver","lenovo"],["phone","gold","iphone"]], ruleKey = "color", ruleValue = "silver" 输出:1 解释:只有一件物品匹配检索规则,这件物品是 ["computer","silver","lenovo"] 。
示例 2:
输入:items = [["phone","blue","pixel"],["computer","silver","phone"],["phone","gold","iphone"]], ruleKey = "type", ruleValue = "phone" 输出:2 解释:只有两件物品匹配检索规则,这两件物品分别是 ["phone","blue","pixel"] 和 ["phone","gold","iphone"] 。注意,["computer","silver","phone"] 未匹配检索规则。
提示:
1 <= items.length <= 1041 <= typei.length, colori.length, namei.length, ruleValue.length <= 10ruleKey等于"type"、"color"或"name"- 所有字符串仅由小写字母组成
class Solution {
public int countMatches(List<List<String>> items, String ruleKey, String ruleValue) {
int i, ans = 0;
if(ruleKey.equals("type")) i = 0;
else if(ruleKey.equals("color")) i = 1;
else i = 2;
for(List<String> item : items)
if(ruleValue.equals(item.get(i))) ++ans;
return ans;
}
}

这是一个关于如何根据给定的规则匹配数组中物品的问题。输入包含一个物品列表,每个物品有类型、颜色和名称,以及一个规则键和规则值。任务是计算匹配规则的物品数量。示例展示了如何匹配颜色为'silver'或类型为'phone'的物品。
213

被折叠的 条评论
为什么被折叠?



