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Recent questions
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python - Using Imblearn dataset
I have a dataset consist of batches of size (32, 32, 3). In keras.balanced_batch_generator(X, y, *[, ]) ... a way to use this function with image patches like my dataset Thanks...
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python - truncating file in 'r+' makes the entire file rectangles
The following is my code: import json id = "iderq23512345123521" with open("file.json", "r+") as f: data = json.loads ... I try to copy and paste the characters, they don't show up...
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Flink DataStream Source读取HDFS数据不会触发窗口计算
1.如题,我用env.readTextFile("hdfs://"),直接打印可以看到数据,但我在创建窗口的计算不会进行,使用了处理时间,窗口是10秒的滚动窗。有人知道为什么吗?...
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amazon cloudwatch - Best practices for logs and metrics in CloudFront with Lambda@Edge?
We got a CloudFront distribution with some custom code in Lambda@Edge functions. We also have APIGW with more lambdas behind it. ... alarms for such setups ? We're using CDK, btw....
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database - How can I identify this "search syntax" or "query language"?
Can anyone identify this 'search syntax' or 'query language' ? I am looking for a more complete specification. There is ... conversions, I don't believe this was a home-grown DSL....
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php 富文本编辑器上传多张图片存数据库,怎么读取
用富文本编辑器上传3张图片,存到mysql数据库是这样的格式 <img src="/uploads/image/20200709/6d553a425cdc4bd8b577019101d31e97.png" alt="" /><img ... 要写一个接口读取出来这三张图,问下大家这样怎么操作? 谢谢了...
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vue权限控制按钮不可编辑
问题描述 vue权限控制某个按钮是否可编辑,核心代码如下图 问题出现的环境背景及自己尝试过哪些方法 当单纯控制其是否显示是正常的,但是控制其是否可编辑就出现问题了,当其需要设置为不可编辑时,我通过vnode的组 ... true) } else { el.style.display = 'none' } } 你期待的结果是什么?实际看到的错误信息又是什么?...
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Jan 27, 2021
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虚拟机安装Ubuntu 18.04.4 LTS server版本,IP设置报错如何解决?
问题描述 我在云平台的虚拟机中安装Ubuntu 18.04.4 LTS server版本(制作镜像) 在进入虚拟机之后,根据ubuntu的引导来安装 配置IP的环节中,subnet填写的是 255.255.255.0/24 ,之后填写address,出现报错 ... 到类似的问题,但是没有解决 扔个?? 麻烦大佬指点一下这一步骤到底应该怎么配置,谢谢围观!...
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虚拟机安装Ubuntu
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Vue导航守卫的一个问题
to.id是undefined的 to.params.id才是有效的 props不是已经绑定了吗?...
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Jan 27, 2021
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sql - (Postgres) How to set value based on row's value
For example, I have this table: Table_A id | classification | key | value | date_time ------+----------------+ ... this? By the way, I am using PostgreSQL 11. Thank you in advance....
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关于node跟chrome的异步请求问题
疑问1:测试发现http.get要等其他代码执行完才会请求,node不是异步非阻塞的吗 疑问2:chrome浏览器执行ajax是异步非阻塞的,node跟chrome引擎是不一样的吗 测试代码1(node v6.17.1) 最终打印的时间为 ... num = 0; for (i = 0; i < 200000000; i++) { num += i; }...
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241
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vue-i18n使用问题
按照教程设置后出现下面的警告(怎么看着像是没有获取到vue版本) i18n.js里面设置如下,然后在main.js中引入 vue版本为2.6.11 en.js如下 export const m = { music:'网易云音乐' }...
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314
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python怎么转化字符串的编码?
text="'\x72\x73\x59\x42\x47':'123'" 怎么转化成为"'rsYBG':123"呢?...
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给个思路,以下代码怎么优化(if-else)
export const fillValueToPanel = (target, resouce, isRate = false) => { Object.keys(target).forEach(key => { let val; if ( ... [key].toLocaleString() } target[key].value = val }); }...
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439
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WordPress迁移Hexo出错
按照Hexo的迁移教程,使用如下命令报错: npm install hexo-migrator-wordpress --save 也参考了提问: wordpress迁移到hexo,安装迁移插件时报错error ... run `npm fund` for details found 0 vulnerabilities npm版本 6.14.7,谢谢...
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118
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请帮我完善这个程序?
from selenium import webdriver import time import win32clipboard import win32api import win32con from selenium.webdriver.common.action_chains ... ') time.sleep(1) print('over')...
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python - In multi-label classification, how do we find the P values and confidence interval for the performance evaluation metrics?
I am doing a multilabel classification using two different classifiers with a dataset of 7 labels and 20 features. I ... provide some suggestions on this? Thank you in advance!...
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Jan 27, 2021
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281
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react native - useState array not updated when invoking function from another screen
I'm trying to add items to an array saved as a local state (using useState) through a function that is sent to ... added before returning to ScreenA is really added to the array....
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Jan 27, 2021
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react
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206
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前端打包之后,访问404
这个项目是打包之后 生成了dist文件夹,我把这个文件夹删除了,然后再次运行,本地部署出现了404 运行 运行正常主页出现 点击任意连接 连后台接口都没调用 config 未打包之前访问正常,打包之后,删掉了dist文件夹,再次启动访问,后台接口大部分访问失败,404/405之类,这是为什么呢?...
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412
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数据库操作,用A表中地区编号去找B表中的地区名。拼接成一条数据返回。
这是order表,有地区编号跟id; 这是address_code表,有地区编号跟中文名 我是想,拿到order表的时候里面的地区号就转为中文名 $address_code ... getAllAddress', $params); $order = api('appsysorderapiorder', 'getOrderFind', $params);...
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246
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java - How to delete all duplicate element from an array without using any library or collection
As the header said. I want to delete all duplicate element from an array without using any library or collection. ... other more efficiently way to delete duplicates? Thank you!...
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Jan 27, 2021
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python - Is there a way to resize properly game's screen?
Every time I try to resize the PyGame window, there's no resizing of the game, it keeps like before, and there's just more ... is there a method or do I just need to hand code it?...
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372
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关于React官网教程游戏源码的问题
首先,源码地址如下: https://codepen.io/gaearon/pe... 目前对于判断成功者这部有所疑问 function calculateWinner(squares) { // console.log(squares) const ... 何将编squares数组中变化的值的位置与lines做匹配的? 不确定我叙述的是否明白...
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ios - How to dismiss context menu (UIContextMenu) programmatically?
I have an iOS app. Some UIViewControllers have automatically updated content, it means that app can get update ( ... to dismiss context menu programmatically? Thanks for any help!...
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recursion - How do recursive SQL Querys terminate and how do they get evaluated?
I ran over the following code I just cannot grasp how the computer would possibly evaluate such code such that cte_count ... I hope someone can make clearer how such Queries work....
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recursion
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MySQL查询表情符号报错问题原因及解决
问题 线上报错 : java.sql.SQLException: Illegal mix of collations (utf8\_general\_ci,IMPLICIT) and (utf8mb4\_general\_ci,COERCIBLE) for ... t where name like '??'; Empty set (0.01 sec)...
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java - Sending Message to Azure Event Hub
I am trying to connect to Azure event hub as described here. But getting below error: Exception in thread "main" java ... the issue? Any input in this regard would be great....
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请问如何使爬虫进行的更快?
爬虫小白,根据网上的代码改成了自己想爬的网页,但是很慢,请教如何使速度变快? import aiohttp import re import urllib.request, urllib.error import xlwt ... 7.0; Windows NT 5.1)'}) process.crawl(MySpider) process.start()...
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Jan 27, 2021
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