problem like

MySQL正则表达式:REGEXP 和 LIKE

正则表达式作用: 根据指定的匹配模式匹配文中符合要求的特殊字符。 REGEXP : ①操作符中常用的匹配列表: ②匹配特殊字符使用\\进行转义 \\. 能够匹配 . \\f 换页 \\n 换行 \\r 回车 \\t 制表 \\ 纵向制表 ③进行or匹配:搜索两个串之一(或者为这个串,或者为另一个串) ......
正则 表达式 REGEXP MySQL LIKE

一个研究课题 A Research Problem UVA10837

输入正整数m(m≤1e8),求最小的正整数n,使得φ(n)=m。n<=2e8。 #include<cstring> #include<algorithm> #include<iostream> #include <map> using namespace std; const int M=1e5+5 ......
研究课题 课题 Research Problem 10837

Can not construct instance of com.hm.drgs.platform.common.dto.data.group.DrgsRecordGroupResultDto, problem: Should never call 'set' on setterless property

报错全部信息: JSON parse error: Can not construct instance of com.hm.drgs.platform.common.dto.data.group.DrgsRecordGroupResultDto, problem: Should never cal ......

解决NewBing报错【Sorry, looks like your network settings are preventing access to this feature.】

开全局,使用浏览器插件Proxy Switchy Omega进行代理 1、x2ray 软件配置 2、Proxy Switchy Omega 配置 将以下规则加入配置: *.msftconnecttest.com +proxy *.1drv +proxy *.microsoft +proxy *.aa ......
preventing settings NewBing feature network

第1章 C#和.NET简介 (Code like pro in C#)

在本书的第一部分,我们将简要介绍C#语言,并讨论它的一些特性。第1章介绍了什么是C#和.NET,以及为什么您会(也不会)在项目中使用它们。第2章深入探讨了.NET的各种迭代,并在编译过程中采用了C#方法,在编译过程的每一个主要步骤都停止下来 。 尽管这部分确实是本书的介绍,但它仍然为熟悉C#的人提供 ......
简介 Code like NET pro

Java: switch lambda-like syntax

The switch expression has an additional lambda-like syntax and it can be used not only as a statement, but also as an expression that evaluates to a s ......
lambda-like switch lambda syntax Java

解决前端启动报错:This is probably not a problem with npm. There is likely additional logging output above.

在执行 npm run dev 运行项目的时候报错: {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"}) npm ERR! code ELIFECYCLE npm ERR! errno 1 npm ERR! phan ......
前端 additional probably logging problem

COMP20007 Task 2: C Problem

Task 2: C ProblemAssignment 1GeneralTask 1: AlgorithmicDesignTask 2: C ProblemAssignment SubmissionAcademic HonestyLate PolicyRequirements: CProgrammi ......
Problem 20007 COMP Task

Codeforces Round 857 (Div. 2) A - Likes

Codeforces Round 857 (Div. 2) A - Likes 题意 有 $n$ 个人给你点赞或取消赞,其中 $x$ 表示 $x$ 号人给你点赞, $-x$ 表示 $x$ 号人给你取消赞。在 $n$ 个单位时间中的每一时刻,都会有一个人进行一次操作。请你安排一种顺序,使得你获得的总点 ......
Codeforces Round Likes 857 Div

UCUP-ZJ M. Minimum Element Problem

题意 给定一个位置x,求在$p_x$分别取1-n的所有情况下,对应笛卡尔树不同的排列个数。 题解 先不考虑$p_x$,列出转移式,发现是卡特兰数。 进一步地,可以把排列对应笛卡尔树意义下的不同构数,和二叉树不同构数等价联系起来:因为对于任何一个二叉树,按照中序遍历在上面填1-n,就可以唯一确定一个排 ......
UCUP-ZJ Minimum Element Problem UCUP

JAVA中如何高效的实现SQL的like语法?

本文主要介绍了一些主流的解析器是怎么实现like的语法逻辑,接着作者分析了几种实现方式的优劣,最终采用状态机的方式,针对场景一步一步进行性能优化。 ......
语法 JAVA like SQL

What is X/Y problem?

X/Y problem means you have a problem X, you think you should solve another problem Y to solve the original problem X, you ask people for help you solv ......
problem What is

Perceptron, Support Vector Machine and Dual Optimization Problem (3)

Support Vector Machines Perceptron and Linear Separability 假设存在一个 linear decision boundary,它可以完美地对 training dataset 进行分割。 那么,经由上述 Perceptron Algorithm ......

P1865 A % B Problem

P1865 A % B Problem 题目链接 题意简述 求区间 $[l,r]$ 内质数的个数 解析 前置知识: 素数判断 / 素数筛法 前缀和 质数是指在大于 $1$ 的自然数中,除了 $1$ 和它本身以外不再有其他因子的自然数。 一层循环判断 $2\sim n-1$ 的每一个数是否是它的因子 ......
Problem P1865 1865

Problem Y: Understanding Used Sailboat Prices

Like many luxury goods, sailboats vary in value as they age and as market conditions change. The attached “2023_MCM_Problem_Y_Boats.xlsx” file include ......
Understanding Sailboat Problem Prices Used

Problem Z: The Future of the Olympics

Background The International Olympic Committee (IOC) is facing a decreasing number of bids to host the Olympics – both Summer and Winter Games[1]. In ......
Olympics Problem Future The the

Perceptron, Support Vector Machine and Dual Optimization Problem (1)

Linear Decision Boundary(线性决策边界) Example. (classification problem) 给定一个二元的特征空间 $\mathcal{X} = \left{ \text{weight} \times \text{height} \right}$,对标签 $ ......

Unable to start the daemon process . This problem might be caused by incorrect configuration of the daemon. For example, an unrecognized jvm option is used.

创建springboot项目的时候报这个错 是因为你选择了Gradle环境 但是你本地没有这个Gradle环境 选择maven环境就可以了 ......

IntelliJ IDEA 怎样关闭重复代码提示:Show all duplicates like this

IDEA 提示如下: Show all duplicates like this Do not detect duplicates of this size 1. 打开左上角File-->Settings,选择Editor-->Inspections 2. 找到General,将duplicated ......
duplicates IntelliJ 代码 IDEA Show

两步解决“新必应 Bing” 的 “Sorry, looks like your network settings are preventing access to this feature”

bing 突然出现提示,怎么办:Sorry, looks like your network settings are preventing access to this feature 两步解决: 1. 安装 ModHeader 扩展插件: https://chrome.google.com/we ......
preventing settings feature network access

转)关于逆问题(inverse problem)的阅读名单

【注1】虽然咱不看这方面的内容,但是既然莫名其妙地下了这么个东西,就想着不能扔了,至少留一份于***当中。 【注2】简单排版,但并未校正,无法保证质量。 【注3】与原文不同,这里按照Mx做了重排,排法类似于大名鼎鼎的冒泡排序,故而more不保证质量。 A Reading List in Invers ......
名单 inverse problem 问题

assembly of tiny problems I come across when using Ubuntu

1. flameshot couldn't work properly. after running, it doesn't act to enable selecting area as expected, but pop out a frame and I need to click 'shar ......
assembly problems across Ubuntu using

Paper Reading: XRRF — An eXplainable Reasonably Randomised Forest algorithm for classification and regression problems

本文提出了一种 XRRF 算法,它通过执行本文提出的 SGFL 和 RRF 算法来得到可解释性、准确性和可解释性之间的权衡。随后引入了基于决策路径特征提取的方法,根据具体的应用解释模型的输出。其中 SGFL 能确定有助于模型准确性的特征,同时保持特征关系的可靠性。RRF 算法则通过利用所提出的改进随... ......
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