const http = require('http'); // 连接数据库 const mongoose = require('mongoose'); const url = require('url'); const querystring = require('querystring'); / ...
分类:
数据库 时间:
2020-06-11 12:01:03
阅读次数:
75
在js里,如果要跳出for循环或者while循环的话,可以用continue或break 在jquery里,只有一个each循环,那么在each循环里,要跳出循环的话,可以用return true或return false。return false:将停止循环 (就像在普通的循环中使用 'break ...
分类:
Web程序 时间:
2020-06-10 09:38:58
阅读次数:
113
前端 <div class="layui-upload"> <button type="button" class="layui-btn" id="upload_pictures">多图片上传</button> <span style="color:re ...
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Web程序 时间:
2020-06-09 23:25:04
阅读次数:
84
public class Calculator { public static void main(String[] args) { //为了避免magic number,采取定义变量 double n1, n2; n1 = 56; n2 = 65; System.out.println(calc( ...
分类:
编程语言 时间:
2020-06-09 22:05:27
阅读次数:
79
The i-th person has weight people[i], and each boat can carry a maximum weight of limit. Each boat carries at most 2 people at the same time, provided ...
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其他好文 时间:
2020-06-09 09:54:47
阅读次数:
67
At a lemonade stand, each lemonade costs $5. Customers are standing in a queue to buy from you, and order one at a time (in the order specified by bil ...
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其他好文 时间:
2020-06-09 09:22:23
阅读次数:
54
1 using System; 2 3 namespace ConsoleApp1 4 { 5 class Program 6 { 7 static int[] InsertArray(int[] bornArray) 8 { 9 for (int i = 0; i < bornArray.Leng ...
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编程语言 时间:
2020-06-08 20:45:52
阅读次数:
59
You have an array of logs. Each log is a space delimited string of words. For each log, the first word in each log is an alphanumeric identifier. Then ...
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其他好文 时间:
2020-06-08 12:55:59
阅读次数:
59
前言 本文将结合实例demo,阐述30条有关于优化SQL的建议,多数是实际开发中总结出来的,希望对大家有帮助。 1、查询SQL尽量不要使用select *,而是select具体字段。 反例子: select * from employee; 正例子: select id,name from empl ...
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数据库 时间:
2020-06-08 00:32:01
阅读次数:
55
You have a lock in front of you with 4 circular wheels. Each wheel has 10 slots: '0', '1', '2', '3', '4', '5', '6', '7', '8', '9'. The wheels can rota ...
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其他好文 时间:
2020-06-07 13:04:24
阅读次数:
50