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VScode使用MySQL插件老是Connect timeout,右下角还出现Cannot read properties of null (reading 'getPassword') error in vs code问题
安装了MySQL插件,一开始还用的好好的结果第二天就不行了真是鬼火直冒。 首先关闭vscode里面的自动更新:setting,搜索update,然后关闭application里面的自动更新; 我现在的版本是1.83.1,我在https://code.visualstudio.com/updates/ ......
解决uniapp button type ts类型冲突问题
安装类型声明文件 npm i -D @dcloudio/types miniprogram-api-typings @uni-helper/uni-app-types @uni-helper/uni-ui-types // tsconfig.json { "compilerOptions": { / ......
为什么我们需要不断的开发不同的机器学习模型 —— Do we Need Hundreds of Classifiers to Solve Real World Classification Problems?
论文: 《Do we Need Hundreds of Classifiers to Solve Real World Classification Problems?》 论文地址: https://jmlr.org/papers/volume15/delgado14a/delgado14a.pdf ......
It's likely that neither a Result Type nor a Result Map was specified.
It's likely that neither a Result Type nor a Result Map was specified. 很可能既没有指定结果类型也没有指定结果映射。 出现问题的代码: 本段代码功能是查询一张表的全部 点击查看代码 <mapper namespace="com.d ......
excel 导出 The maximum length of cell contents (text) is 32767 characters Excel单元格最大存储长度32767个字符,超长会报错,数据库中也有这个最大长度
excel 导出 The maximum length of cell contents (text) is 32767 characters 导出excel功能,报错。错误日志提示::The maximum length of cell contents (text) is 32767 chara ......
[LeetCode] 2863. Maximum Length of Semi-Decreasing Subarrays_Medium tag: stack
You are given an integer array nums. Return the length of the longest semi-decreasing subarray of nums, and 0 if there are no such subarrays. A subarr ......
CF882E1+CF1882E2 Two Permutations 题解-构造题
CF882E1+CF1882E2 Two Permutations 题解-构造题 哇,人类智慧,太智慧了。。。 此题作为20231010联考的 T3。 感觉赛时根本没有去往这方面想。 CF1882E1 CF1882E2 E1 是简单版,就是没有要求操作数最小化。 E1-Easy Version 方法 ......
1——of C++ and Java togather
因为那个C++最全的笔记是从第18课开始做(笔者说18课之前都很基础),所以这里就对前18课的知识做个笔记总结 C++的工作过程 这里提到的C++工作过程主要涉及两个:编译与链接 之前考研时候学到,(在组成原理的某个章节),计算机的工作过程其实就涉及 “将源程序转换成可执行文件”,与其中便有许多雷同 ......
【论文阅读】Accuracy of real-time multi-model ensemble forecasts for seasonal influenza in the U.S.
原始题目:Accuracy of real-time multi-model ensemble forecasts for seasonal influenza in the U.S. 中文翻译:针对美国季节性流感的实时多模型集合预报的准确性 发表时间:2019年11月22日 平台:PLOS Com ......
ERROR in node_modules/rxjs/dist/types/internal/operators/combineLatest.d.ts(3,61): error TS1005: ‘,’ expected.
原文链接:https://www.longkui.site/error/error-in-node_modules-rxjs/4839/ angular项目,启动的时候报错。详细的报错如下: 这个报错的原因比较简单,rxjs的版本不对,我用的是angular7可能和rxjs版本不匹配。 解法方法也很 ......
Property ‘includes’ does not exist on type ‘any[]’.
原文链接:https://www.longkui.site/error/property-includes-does-not-exist-on-type-any/4833/ angular项目,TypeScript。 项目正常跑的时候没有问题,打包项目(package)的时候开始报这个错误。 然后定 ......
问题记录贴:vue-i18n在弹出框中$t()报错:TypeError: Cannot read property '_t' of undefined
网上有用的解决方法:vue 国际化在弹出框中$t()报错:TypeError: Cannot read property '_t' of undefined 大佬给出的解决方法: 弹窗是一个新的Vue对象,只需要单独给弹窗重新绑定i18n即可。 代码: // dialog/main.js impor ......
CodeForces 1882E1 Two Permutations (Easy Version)
洛谷传送门 CF 传送门 考虑若是对一个排列进行操作,怎么做。 我们维护一个排列上的值域连续段 \([l, r]\),满足 \(a_{l + 1} = a_l + 1, a_{l + 2} = a_{l + 1} + 1\),以此类推。初始 \(l = r = 1\)。 那么我们每次可以选择往外扩充 ......
CodeForces 1882E2 Two Permutations (Hard Version)
洛谷传送门 CF 传送门 如何评价,模拟赛搬了一道,前一天晚上代码写了一半的题。 考虑如何让操作次数最小。发现直接做太困难了。根本原因是,一次操作对序列的影响太大了。考虑做一些转化,减少一次操作对序列的影响。 仍然先考虑一个排列怎么做。 不知道为什么可以想到在排列前面添加特殊字符 \(0\) 变成 ......
日期格式转换异常:Java 8 date/time type `java.time.LocalDateTime` not supported by default: add Module \"com.fasterxml.jackson.datatype:jackson-datatype-jsr310
异常信息: "unexpected error: Type definition error: [simple type, class java.time.LocalDateTime]; nested exception is com.fasterxml.jackson.databind.exc.I ......
typescript: Chain of Responsibility Pattern
/** * Chain of Responsibility Pattern 责任链是一种行为设计模式, 允许你将请求沿着处理者链进行发送, 直至其中一个处理者对其进行处理。 * file: Chaints.ts * The Handler interface declares a method fo ......
[LeetCode] 2282. Number of People That Can Be Seen in a Grid_Medium tag: stack.
You are given an m x n 0-indexed 2D array of positive integers heights where heights[i][j] is the height of the person standing at position (i, j). A ......
[LeetCode] 1944. Number of Visible People in a Queue_Hard tag: stack
There are n people standing in a queue, and they numbered from 0 to n - 1 in left to right order. You are given an array heights of distinct integers ......
【论文笔记】A theory of learning from different domains
防盗 https://www.cnblogs.com/setdong/p/17756127.html domain adaptation 领域理论方向的重要论文. 这篇笔记主要是推导文章中的定理, 还有分析定理的直观解释. 笔记中的章节号与论文中的保持一致. 1. Introduction doma ......
Basic concepts of complex number
目录虚数的引入复数和虚数的关系Example - 分辨一个数判断两个复数是否相等的条件共轭复数复数的几何意义、复平面的认识求复数的模 虚数的引入 假设有一个数,可以叫它狗逼数,但是不太好听,改成高大上一点,叫成虚数吧! 对它的定义如下: 虚数=i \(i^2\) = -1 这样搞有什么好处吗? 假设 ......
[CF1158F]Density of subarrays
F - Density of subarrays 屲,平衡复杂度题 首先考虑如何求一个序列的密度 从最左端开始,找到需序列\(A[1...n]\)的最小段\(A[1...a_1]\),使其包含\(1\sim c\)的所有颜色,然后又以\(a_1+1\)为起点,找下一个最短的包含\(1\sim c\) ......
[Typescript] Type and Interface for performance
Let's say you're creating a component that has all the props of input but needs to add a label prop. You'll need to extend from the ComponentProps typ ......
CF915F Imbalance Value of a Tree
原题 翻译 首先观察式子: \[\sum_{i=1}^{n} \sum_{j=i}^{n} \max\{ i,j \} - \min\{i,j\} = \frac{ \sum_{i=1}^{n} \sum_{j=1}^{n} \max\{i,j\} - \min\{i,j\} }{2} = \fra ......
[902] Get the current file's directory of CMD batch scripts
In a batch file, you can use the %~dp0 special variable to get the directory of the currently executing batch file. Here's how you can do it: @echo of ......
[901] Reuse variables of CMD batch scripts
In a batch file, you can reuse a variable to generate different file paths by concatenating the variable with other strings or variables. Here's an ex ......
[900] Print an empty line of CMD batch scripts
Use the echo. command to print an empty line. @echo off echo This is a line of text echo. echo This is a new line of text This will produce the output ......
[898] Convert the data type of a DataFrame column
In Pandas, you can convert the data type of a DataFrame column to a string data type using the .astype() method. Here's how to do it: import pandas as ......
[895] Sort the rows of a DataFrame
In Pandas, the sort_values() method is used to sort the rows of a DataFrame by one or more columns. This method allows you to specify which column(s) ......
引用axios时出现问题——Cannot read properties of undefined (reading 'get') TypeError: Cannot read properties of undefined (reading 'get')
问题描述 我就是按照特别正常的操作进行引用,但是就一直显示axios的get未定义; 问题解决 本来我是使用的this.$axios.get,引用的全局变量, 然后直接改成这样(在该vue界面定义的import,没有使用全局变量): 就能解决这个问题啦! ......
np.expand_dims: AxisError: axis 4 is out of bounds for array of dimension 4
np.expand_dims axis = 0时,[]加在最外面 axis = 1时,给每一行都加[] axis = 2时,给每一个元素都加[] x_train = np.expand_dims(X, axis=4) AxisError Traceback (most recent call las ......