2678. 老人的数目

class Solution:
    def countSeniors(self, details: List[str]) -> int:
        return sum(int(x[11:13]) > 60 for x in details)

class Solution {
    public int countSeniors(String[] details) {
        int ans = 0;
        for (var x : details) {
            int age = Integer.parseInt(x.substring(11, 13));
            if (age > 60) {
                ++ans;
            }
        }
        return ans;
    }
}

class Solution {
public:
    int countSeniors(vector<string>& details) {
        int ans = 0;
        for (auto& x : details) {
            int age = stoi(x.substr(11, 2));
            ans += age > 60;
        }
        return ans;
    }
};

func countSeniors(details []string) (ans int) {
	for _, x := range details {
		age, _ := strconv.Atoi(x[11:13])
		if age > 60 {
			ans++
		}
	}
	return
}

function countSeniors(details: string[]): number {
    let ans = 0;
    for (const x of details) {
        const age = parseInt(x.slice(11, 13));
        if (age > 60) {
            ++ans;
        }
    }
    return ans;
}

impl Solution {
    pub fn count_seniors(details: Vec<String>) -> i32 {
        let mut ans = 0;

        for s in details.iter() {
            if let Ok(age) = s[11..13].parse::<i32>() {
                if age > 60 {
                    ans += 1;
                }
            }
        }

        ans
    }
}

function countSeniors(details: string[]): number {
    return details.filter(v => parseInt(v.slice(11, 13)) > 60).length;
}

impl Solution {
    pub fn count_seniors(details: Vec<String>) -> i32 {
        details
            .iter()
            .filter_map(|s| s[11..13].parse::<i32>().ok())
            .filter(|&age| age > 60)
            .count() as i32
    }
}