HJ19 简单错误记录
const readline = require("readline");
const rl = readline.createInterface({
input: process.stdin,
output: process.stdout,
});
let dataList = [];
rl.on("line", function (line) {
line.split("\n").forEach((record) => {
let [filePath, lineNum] = record.split(" ");
filePath = filePath.split("\\").pop().substr(-16);
lineNum = +lineNum;
const index = dataList.findIndex(
(item) => item.filePath == filePath && item.lineNum == lineNum
);
if (index == -1) {
dataList.push({ filePath, lineNum, count: 1 });
} else {
dataList[index].count++;
}
});
});
rl.on("close", () => {
dataList.slice(-8).forEach((item) => {
console.log(Object.values(item).join(" "));
});
});
通过读题,我以为用这个模板就可以接收完数据...
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 tokens = line.split(' ');
let a = parseInt(tokens[0]);
let b = parseInt(tokens[1]);
console.log(a + b);
}
}()
另外题目说"记录最多 8 条错误记录",我误用了shift
方法。在后面的论述中,也能看出不妥。其实这里是指输出最后 8 条记录,
HJ20 密码验证合格程序
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 isAllow = true;
if(line.length > 8){
let count = 0;
if(line.match(/\d/)){
count++;
}
if(line.match(/[a-z]/)){
count++;
}
if(line.match(/[A-Z]/)){
count++;
}
if(line.match(/[^\dA-z]/)){
count++;
}
if(count < 3){
isAllow = false;
}
if(line.match(/(.{3,}).*\1/)){
isAllow = false;
}
}
else{
isAllow = false;
}
if(isAllow){
console.log('OK');
}
else{
console.log("NG");
}
}
}()
首先温习几个知识点:
\w
表示 a-z、A-Z、0-9,以及下划线[^0-9A-z] 等价于 [0-9A-z]
/1
在正则表达式里代表匹配的第一个元组
只记得$1
,想着判断是否符合条件三很麻烦的,看了下别的题解,吓了一跳,我验证是对的
const readline = require("readline");
const rl = readline.createInterface({
input: process.stdin,
output: process.stdout,
});
//个人觉得Js Node版本获取输入用起来比V8版本要麻烦一些
rl.on("line", function (line) {
console.log(checkValid(line));
});
function checkValid(str) {
let output = 'OK';
//重点解释一下下面这条正则表达式,整体思想是排出单一种,单两种符号的全部组合,剩下的自然是三种以上符号的组合
let regex = /^(?![A-Za-z]+$)(?![A-Z\d]+$)(?![A-Z\W]+$)(?![a-z\d]+$)(?![a-z\W]+$)(?![\d\W]+$)\S{8,}$/
if (!str.match(regex)) {
output = 'NG';
}
//这里没有使用正则表达式,因为在用例中会出现特殊符号如‘(’等,如果把该符号直接转成正则表达式,则会报错,故采用includes方法
for (let i = 0; i < str.length-3; i++) {
let newStr1 = str.slice(i, i+3); newStr2 = str.slice(i+3);
if (newStr2.includes(newStr1)) {
output = 'NG';
break;
}
}
return output;
}
离职在家的第 192 天。