题解 | #字符统计#
字符统计
https://www.nowcoder.com/practice/c1f9561de1e240099bdb904765da9ad0
object 和 array 转换中 reduce()及sort()方法的使用 完整代码如下：
const rl = require("readline").createInterface({ input: process.stdin });
var iter = rl[Symbol.asyncIterator]();
const readline = async () => (await iter.next()).value;
void async function () {
// Write your code here
while(line = await readline()){
let object = line.split('').reduce((a, b) => ({...a, [b]: a[b] ? a[b] + 1 : 1}), {})
let ordered = Object.entries(object).sort(([k,a], [v,b]) => {
if (a == b) {
return k.charCodeAt(0) - v.charCodeAt(0)
}
else {
return b-a
}
}).reduce((a, b) => a + b[0], '')
console.log(ordered);
}
}()
查看8道真题和解析