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find - searching an exact number of files in a Linux directory

I want recursively count files in a Linux directory using this find DIR_NAME -type f | wc -l my question is , how to stop ... Is it possible ? Or do I need to wait find execution ?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mac系统怎么安装基于APR的Apache Tomcat本机库

[main] org.apache.catalina.core.AprLifecycleListener.lifecycleEvent 在java.library.path:[/Users/muyuchen/Library/Java/Extensions:/Library/Java/Extensions ... 一直报这个错误，这个APR是啥啊？（新手一个）...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql 左表连接右表查询，当右表关联数据没有，查询所有左表结果怎么显示

项目表+订单表，需要查询所有项目的订单总额,现在订单表没有status=1的数据的话，查询结果就不显示所有项目 Project::leftjoin('orders','orders. ... total_money') ->groupBy('project.id') ->orderByDesc('total_money') ->paginate(10);...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Applying MAX on COUNT with sub queries and JOIN | SQL Oracle

I'm trying to list the projects with the highest number of employees assigned to work on it. This lists only ... the projects with the highest number of employees on them. Thanks...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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el-checkbox check属性为true但页面却没有打勾?

el-checkbox check属性为true但页面却没有打勾,这是什么鬼? 具体情况: <el-checkbox v-for="itm in fieldList" :label="itm.label" :key="itm.label" :checked="itm. ... 个很简单的问题但是作为前端小白的我还是不太懂,希望有知道的老哥帮忙看一下...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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if-else语句一起执行过程中else未执行

如图代码,选中一起执行,第一次执行时只运行了if部分,未执行else部分. 重新执行一次,就都执行了,什么原因?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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angular模块作为子路由只能通过懒加载吗

如果模块B中的所有页面都要渲染到模块A的子路由下，那是不是只能通过loadChildren来加载模块B...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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C#的Graphics的GetHdc的释放问题

当我用Graphics的GetHdc时，结束的时候无论我用ReleaseHdc()，还是ReleaseHdc(hDC),还是ReleaseHdcInternal(hDc),内存都不能释放代码如下： Graphics g = Graphics. ... .ReleaseHdc(destDC); g.Dispose(); 麻烦问一下谁知道这是为什么呢？...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - why is fit_transform() not applied to test sets?

from sklearn.preprocessing import StandardScaler sc = StandardScaler() X_train[:, 3:] = sc.fit_transform(X_train[:, 3:]) ... test set and why is it applied only to training set?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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virtualenv install on Python 3.7 Mac 10.15.7 successful but not working

I need to create a Python 2.7 virtual environment to run code that only works in Python 2.7 I installed virtualenv ... bad interpreter: No such file or directory What's going on?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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wordpress - Change 'Select Country' text in Ninja Forms Country element

I want to change the select country option text to nationality. Is there any filter/hook/hack to do so? Any help will be appreciated....

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - json array to pandas dataframe and write it to csv

I have a json array like below and i wanted to convert into a pandas dataframe and write it into a csv finally. I have ... results/0101/a.csv', mode='a', index=False, header=True)...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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在DolphinDB中dropTable()删除某个表后为什么原路径还存chunk.dict文件？

我在DolphinDB中用dropTable()函数成功删除了某个已经创建的表，但是为什么原来的文件夹下还有chunk.dict这个文件?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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指数形式的傅里叶积分

老哥们救救孩子吧，划线的不知道怎么来的...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - Creating a transparent blur view in SwiftUI

My goal is to create a blur view like the view on the top right corner of the below image. I've tried the top 3 ... through the blur view. How can I create such a view in SwiftUI?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How do I restart the pipeline with pyrealsense2?

I bought an Intel RealSense T265 camera and I am testing out the following example: import pyrealsense2 as rs import cv2 ... it recognizes my device every time I run the script?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mongoose - Mongodb: push element to nested array if the condition is met

I have the following collection: { "_id": 11, "outerArray": [ { "_id" : 21, "field": { "innerArray" : [ 1, ... ": 4} } ) How to make it push to all coresponding innerArrays?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.0k views

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vue.js - Docker Compose MEVN not reflecting updates made to package.json

I am trying to deploy my MEVN app using Docker, but I can't seem to make Docker update when I change my package.json I'm ... scripts": { "start": "vue-cli-service serve", ... },...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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chrome的FPS meter 要怎么看，为什么我显示出来的不是直接的帧数

看不太懂，没有直接显示fps，是要计算吗...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - vue-slick-carousel touch move not working

I have a laravel vue.js project, in my project I use vue slick carousl this is my component code <categories- ... is in progress and cannot be interrupted. please help, Thanks....

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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verilog - Functional Coverage - bin that collects all values that are not collected in other bins

ipv6_hdr__f_next_header_cp: coverpoint this.ipv6_hdr.ipv6_f_next_header iff (this.has_ipv6_header){ bins ipsec_33 = {'h33}; bins ... way of making the default an active bin?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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关于MVVM和MVC的一个疑问

已知vue/react/angular都是当前主流的MVVM框架，然后根据我目前的搜索和认知： MVC是指：数据--->控制器---->视图然后这个控制器的概念应该是相对于服务端说的吧？就是写一套服务端的业务逻辑，去处理视图所需要的数 ... 数据后渲染到视图层上所以MVVM是不是其实是 MVCVM ？请问下我上面有没有理解错的，帮我分析一下，谢谢！...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - New to Sequelize, how should I go about writing a seed file given a self referencing belongsToMany relationship?

table schemas. I have 3 mysql tables using sequelize, Person, Location, and Relationship. Location ... =InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.4k views

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laydate日期控件不绑定回显时间到当前dom

如下：当选择了时间后就会回显时间到当前dom了，怎么取消不回显呢？试了再回调中操作内容清空也不行。解决：在done回调增加异步清除即可：...

asked Jan 25, 2021 in Technique[技术] by 深蓝 (71.8m points)

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多路径算法问题

如图所示：现在有这样一组路径，物体从1开始出发，目标点是5，先从逆时针看，物体可选路径为 1 => 11 => 2 => 3 => 4 => 5 1 => 11 => 12 => 4 => 5 如果物体到达结点11后，2号结点拥堵不可行 ... 换路径？还是有别的更好的方式，像这种结点形式的，如果不考虑最短路径，用什么数据结构表示比较好呢？请各位指点一下 ...

asked Jan 25, 2021 in Technique[技术] by 深蓝 (71.8m points)

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4.1k views

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有关App保活遇到一个App怎么都杀不掉，不知道是什么原理？

apk链接：https://pan.baidu.com/s/1vQRs... 提取码：39b7 无法杀死，且随意弹广告和自制锁屏页面我查看了代码，和年前一篇博客说的很相似 https://ostack.cn/a/11... 另外发现，如果杀死微信的花，此App就可以被杀死...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Weird If/Else Problem with Javascript & Express

I'm having a problem checking if a object is undefined or not. Weirdly, this error doesn't occur in Mac OSX ... that if statement though, atleast on Windows. Appreciate any help!...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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nodejs代理采集找不到资源

const http = require("http"); const cheerio = require("cheerio"); const iconv = require('iconv-lite'); const BufferHelper = require('bufferhelper') ... ) 直接是可以采集到内容，不知道哪里写错了，请求大神指导...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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