Leading

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JS节流

export default function throttle(fn, interval = 1000, options = { leading: true, trailing: false }) { // 1.记录上一次的开始时间 const { leading, trailing, resultCallback } = options let lastTime = 0 let timer = null // 2.事件触发时, 真正执行的函数

mysql trim函数并拼接

语法去除前面的'0'字符串语法: trim( LEADING '0' FROM '01' ) 去除前后的'0'字符串 SELECT trim( '0' FROM '00100' ) 结果 SELECT concat( trim( LEADING '0' FROM '01' ), '月' ) 月执行效果图

java.sql.SQLException: Connection is read-only. Queries leading to data modification are not allowed

错误 Error updating database. Cause: java.sql.SQLException: Connection is read-only. Queries leading to data modification are not allowed ### The error may exist in file [E:\javaproject\Demo11\spring-01-hellospring\spring-09-transaction\target\class

炫“库”行动-人大金仓有奖征文- KingbaseES leading hint 使用

【本文正在参与炫“库”行动-人大金仓有奖征文】活动链接：https://marketing.csdn.net/p/98bd30353e7cb998b6070a89e8b91edb Oracle hint -- leading 的作用是提示优化器某张表先访问，可以指定一张或多张表，当指定多张表时，表示按指定的顺序访问这几张表。而 KingbaseES leading hi

ARC 127

A - Leading 1s 题意：设 \(f(x)\) 为 \(x\) 这个数的前导 1 的个数。给定一个数 \(n (1<=n<=10^{15})\) code: #include<bits/stdc++.h> #define ll long long using namespace std; int main() { ll n; cin >> n; ll ans = 0; for(int x = 1; x <= 16; ++x) {

Leading and Trailing 题解(a^b的前三位)

题目链接题目思路对于这种很大数还是要想到用对数则\(n^k\) =$10x\times10y $，其中\(10^x\) 的值等于位数，而\(10^y\)（这是一个大于等于1小于10的浮点数）决定了位数上的值。我们把\(10^y\)求出来代码 #include<bits/stdc++.h> #define fi first #define se second #define debug

flutter基础布局之 Drawer

Drawer 一般放在标题栏上，通过ListView和ListTile的配合，用于显示隐藏的标题。 Scaffold( appBar: AppBar( title: const Text('Drawer Demo'), ), drawer: Drawer( child: ListView( padding: EdgeInsets.zero, children: const <Widget>[ Dra

Python reportlab table 设置cellstyle枚举,设置单元格padding

可以设置cellsyle 的选项： def _setCellStyle(cellStyles, i, j, op, values): #new = CellStyle('<%d, %d>' % (i,j), cellStyles[i][j]) #cellStyles[i][j] = new ## modify in place!!! new = cellStyles[i][j] if op == 'FONT':

golang 日期格式化参数介绍

CarbonstrftimeGoMeaningExample Y %Y 2006 Year, four digits 2020 y %y 06 Year, two digits 20 m %m 01 Month, two digits 08 n - 1 Month, as a number without leading zeros 8 M %b Jan Month name, abbreviated Aug F %B January Month, full name A

Leading Robots

Leading Robots || 单调栈题意：一群机器人，已知它们的初始位置和加速度（初速度都为0），同时开始向右运动，求在无限长的时间内，有多少个机器人可以位于最前面（与别人同时为第一不算第一）。有可能有相同起始位置和加速度的机器人。思路：我们假设有一个机器人位置序列A、B、C......（A在B前

java.sql.SQLException: Connection is read-only. Queries leading to data modification are not allowed

今天更新数据时出现这个错误： java.sql.SQLException: Connection is read-only. Queries leading to data modification are not allowed 原因是：我在service层设置了只读。@Transactional(readOnly = true) 而更新的方法没有把可读设置为FALSE。解决办法是在方法上加上readOnly=F

Leading Robots

Leading Robots 题意：给了\(n\)个机器人的初始位置\(p\)和加速度\(a\)，起始速度都是\(0\)，问起跑后，问你有多少个机器人当过第一名，即在某一时刻，有唯一一个机器人如果冲在最前面则他是当过第一名的，注意并列第一则不算第一，赛道是无限长的。大佬题解：here AC_Code: 1 #include<cstdio>

2020 Multi-University Training Contest 1-1009 Leading Robots

http://acm.hdu.edu.cn/showproblem.php?pid=6759 题意：给定一些车的初始位置和加速度（初速度为0 　　问某一时刻的领先车有多少种情况分析：　　初始位置最大的一定会在一开始领先　　初始位置小的（或相同）且加速度小的没有机会成为领先思路：　　机器人先按加速度 a 排序

HDU多校第一场 1009.Leading Robots

题解思路：首先，我们很容易知道一个点能当第一的条件是它在超过前面所有人之前不能被他后面的人超过。那么先考虑哪些点能超过前面的所有点呢？显然需要你的加速度大于前面所有点的加速度，那么我们就可以先按照位置排序，再按照加速度排，只考虑 pos1>pos2 && a1<a2 的点即可。我们处理出

Codeforces Round #588 (Div. 2) B. Ania and Minimizing(构造)

链接: https://codeforces.com/contest/1230/problem/B 题意: Ania has a large integer S. Its decimal representation has length n and doesn't contain any leading zeroes. Ania is allowed to change at most k digits of S. She wants to do it in such a way that S

B. Ania and Minimizing （Codeforces Round #588 (Div. 2) ）

Ania has a large integer SS. Its decimal representation has length nn and doesn't contain any leading zeroes. Ania is allowed to change at most kk digits of SS. She wants to do it in such a way that SS still won't contain any leading zeroes

[LeetCode] 911. Online Election 在线选举

In an election, the i-th vote was cast for persons[i] at time times[i]. Now, we would like to implement the following query function: TopVotedCandidate.q(int t) will return the number of the person that was leading the election at time t. Votes

flutter-基础列表

// 基础列表 class CustomList extends StatelessWidget { @override Widget build(BuildContext context) { final title = "基础列表示例"; return MaterialApp( title: title, home: Scaffold( appBar: AppBar( title: Text(t