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题解 | #无重复数组#

在某两个数范围内的随机数公式：Math.random() * (end - 1) + start indexOf判断是否有重复 <!DOCTYPE html> <html> <head> <meta charset="utf-8"> ...

2023-02-12

0 150

题解 | #分组过滤练习题#

SELECT university, ROUND(AVG(question_cnt),3) AS avg_question_cnt, ROUND(AVG(answer_cnt),3) AS avg_answer_cnt FROM user_profile GROUP BY university H...

2022-11-28

0 129

题解 | #数组倒转#

import java.util.Arrays; import java.util.Scanner; public class Main { public static void main(String[] args) { int[] arr = new int[6]; ...

Java

2022-06-15

0 276

题解 | #判断质数#

import java.util.Scanner; public class Main { public static void main(String[] args) { Main main = new Main(); Scanner scan = new...

Java

2022-06-15

1 339

题解 | #数组最大值#

{"css":"","js":"function _max(array) { // 补全代码 let max = 0; array.sort(function (a,b){ return a - b; }).reverse(); //都可...

HTML/CSS/JavaScript

2022-06-11

0 242

题解 | #数组转字符串#

{"css":"","js":"function _join(array) { // 补全代码 //代替replaceAll return array.toString().replace(new RegExp(\",\",\"g\"),\"\"); }","html":"","libs":[]...

HTML/CSS/JavaScript

2022-06-11

0 186

题解 | #删除数组最后一个元素#

{"css":"","js":"function truncate(arr) { for(let i = 0;i < arr.length;i++){ return arr.slice(0,-1); //包括第一位但是不包括最后一位（-1） } return s; }","...

HTML/CSS/JavaScript

2022-06-10

0 162

题解 | #查找元素位置#

{"css":"","js":"function findAllOccurrences(arr, target) { let a = []; for(let i = 0;i < arr.length;i++){ if(arr[i] == target){ a.p...

HTML/CSS/JavaScript

2022-06-10

0 176

题解 | #完全等同#

{"css":"","js":"function identity(val1, val2) { return val1 === val2; 还有es6的： return Object.is(val1,val2); }","html":"","libs":[]}

HTML/CSS/JavaScript

2022-06-09

0 170

题解 | #数组求和#

{"css":"","js":"function sum(arr) { var s = 0; for(let i = 0;i < arr.length;i++){ s += arr[i]; } return s; }","html":"","libs":[]}

HTML/CSS/JavaScript

2022-06-09

0 272