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Welcome to Our Knowledge Sharing Community-Open, Learning,Share
Welcome to developer's Knowledge Sharing Community-Open, Learning,Share 欢迎来到 程序员专属的知识分享社区! 一个分享知识,传递知识,学习知识的社区!...
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Feb 5, 2021
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welcome
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在Android-databinding的xml文件中,绑定表达式如何引用其他控件的内容?
举个例子,一个登陆界面,有两个输入框和一个按钮: <EditText id="@+id/etName" /> <EditText id="@+id/etPwd" /> <Button id="@+id/btnLogin" /> ... }"/> login函数是需要两个参数的,我这里应该如何获取两个EditText的内容(etName和etPwd)呢?...
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Jan 27, 2021
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Technique[技术]
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0
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419
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在.js文件中封装的函数可以用,在.vue文件中调用用不了
var array1 = [ { id: 1, name: '小明' }, { id: 2, name: '小红' }, { id: 3, name: '小雷' } ]; function formData( ... (newKey) { obj[newKey] = obj[key] delete obj[key] } } } return mydata }...
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Jan 27, 2021
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Technique[技术]
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csv - python read file (or string) into dictionary by first separator only
I need to read a file into a dictionary but it contains more than one separator: AGE 32 JOB clerk NAME Bob ... has a second whitespace. How can I suppress the second delimiter?...
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Jan 27, 2021
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csv
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126
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javascript - ToggleClass and SlideToggle with Class Selector
I have a problem regarding the class selector. I have this hamburger menu that is only shown in certain window size (small). In order ... assessments</li> </ul> </li> </ul> </nav>...
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Jan 27, 2021
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Technique[技术]
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javascript
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mysql - How to find the list of columns that contain one or more null values in SQL
I am new to the SQL word and came across a problem where I have an IMDb schema with various tables. My ... and Production_company and my query is expected to return this list....
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Jan 27, 2021
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mysql
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303
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variables - Ansible List acces from value var
On Ansible, how to acces to value of dict from value in other var? Example: #Var: class_to_traitement: a #Declare list: students: a: 10 ... : "msg: [{u'a': u'10'}]" Thanks All!...
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Jan 27, 2021
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variables
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255
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c# - How to get type of TKey and TValue given a Dictionary<TKey,TValue> type
I want to get type of TKey and TValue given a Dictionary<TKey,TValue> type. eg. If type is Dictionary<Int32,String ... to get keyType = typeof(Int32) and valueType = typeof(String)...
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Jan 27, 2021
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c#
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1.3k
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python - How to fix "TypeError fit_generator() got an unexpected keyword argument 'samples_per_epoch'"
defining the samples per epoch = 1212 and nb_val_samples = 20 nb_epoch=20, validation_data=test_set, nb_val_samples=300 then in am getting the error...
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Jan 27, 2021
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Technique[技术]
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71.8m
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python
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249
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process - java-processing floating point rounding error, how to keep radians rational
I have modified this arcball class so that every call to arcball.rollforward(PI/180); rotates a matrix 1 degree. I ... edit this later to work with rotations other then 1 degree }...
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Jan 27, 2021
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Technique[技术]
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71.8m
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process
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177
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1
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vue如何嵌入mackdown文档?
我有这么一个想法,目前我用脚手架创建了一个vue项目,然后创建一个内容页面,如何将我本地原有mockdown文章融合进该页面呢? vuepress可以动态的根据mockdown文件创建成页面实现类似的操作,但是需要另启一个进程。 请问有没有更好的方法实现我的需求呢?还望解答,谢谢!...
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Jan 27, 2021
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Technique[技术]
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71.8m
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0
votes
338
views
1
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algorithm - Modify multiple weighted sorting for newcomers in booking system
I have implemented an multiple weighted sorting method in a photographer booking project (learning project) for recommendation ... find a better way. Thanks for your concern!...
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Jan 27, 2021
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Technique[技术]
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algorithm
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210
views
1
answer
24小时最高,最低计算
已知: 数据库里面会每100ms-2s不等记录一条数据 现在需要有一个worker在数据库插入新值时滚动计算:当前时间到之前的24小时的最大最小值 我自己的做法: 维护一个24小时的数据dmap, 每次新插入值, 需要写入维护的 ... , 剔除过期的dmap元素 问题: 是否可以使用redis,或者其他更优的解决办法? 另外这个dmap很大, 感觉不合适...
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Jan 27, 2021
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Technique[技术]
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71.8m
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0
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478
views
1
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请问下js里面async这样用可以实现异步串行的功能吗?
async function handleData () { const res1= await getData1() if (res1.code === 'ok') { const res2 = await getData2() if (res2.code === 'ok') { ... 的方法 请问下我这么写能实现吗?如果不行请问下该怎么实现异步串行呀?...
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Jan 27, 2021
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Technique[技术]
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187
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1
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c# - Is there a way that I could assign a value to a variable at the same time as checking if it's null or not?
I currently have this code: private static void IsEntryWidthChanged(BindableObject bindable, object oldValue, object ... became: singleEntryGrid._column3.Width = (double)newValue;...
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Jan 27, 2021
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Technique[技术]
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71.8m
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c#
0
votes
192
views
1
answer
CSS 3 make circle bottom shadow full
Hello I have a problem with a circle, I want to create a separation effect. I use box-shadow property: box-shadow: 0 1px ... ,css How I can make box-shadow full and left and right?...
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Jan 27, 2021
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Technique[技术]
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71.8m
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CSS
0
votes
282
views
1
answer
Gradle离线模式以及下载jar包的原理?
大佬们好,我发现gradle下载jar包后是放在它自己的缓存目录中,而不会下载到本地仓库目录中,然后当我使用gradle离线模式时,就会报错说我本地仓库目录中不存在某某jar包,我就很疑惑为什么要这么设计,还是我理解有问题 ... 而开启离线模式则只会在本地仓库中找,找不到就报错,却不管gradle缓存目录中是否存在 求大佬解答 ...
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Jan 27, 2021
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Technique[技术]
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71.8m
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0
votes
337
views
1
answer
请问现在那个使用那个跨前端技术会比较好。
React Native / Weex / Flutter / uni-app 如何选择好呢...
asked
Jan 27, 2021
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Technique[技术]
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深蓝
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71.8m
points)
0
votes
165
views
1
answer
php - An hyperlink opens a new tab that closes itself as soon as the intended page appears
This problem is with our order management system. Clicking view order button as seen in the screenshot below goes to a new ... a href="amazon_nodes_add.php">Amazon Nodes</a> </li>...
asked
Jan 27, 2021
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Technique[技术]
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71.8m
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php
0
votes
102
views
1
answer
java - Unable to add the task to listview in my tasks app
So I am working on a tasks app. I am trying to set up a functionality, that might sound a little ... android:id="@+id/etWorkingMins" android:layout_width="wrap_content" an...
asked
Jan 27, 2021
in
Technique[技术]
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深蓝
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71.8m
points)
java
0
votes
198
views
1
answer
sql - Fastest way to update column with rownum
I have a table contains data for 3 months , every day contains about 100,000,000 records. I want to update the table with ... an index on the date column that I'm using to update....
asked
Jan 27, 2021
in
Technique[技术]
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深蓝
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71.8m
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sql
0
votes
116
views
1
answer
How to call multiple ajax request using console log
How can i call multiple time ajax request using on console log. i have Reply XHR to working fine but i need multiple request send using console log. any idea?...
asked
Jan 27, 2021
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Technique[技术]
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71.8m
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How
0
votes
591
views
1
answer
npm或者yarn安装的时候我没有-D,最后打包的时候,开发环境的依赖会被打包吗?
如题:安装依赖的时候如果我不主动区分生产环境依赖包和开发环境依赖包,依赖信息会默认存在dependencies,那build时候会把dependencies字段里所有的依赖打包吗?如果是,react官网安装typescript时候为什么不加-D如果不是pageage.json中区分dependencies和devDependencies有什么意义?...
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Jan 27, 2021
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Technique[技术]
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深蓝
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71.8m
points)
0
votes
262
views
1
answer
Nginx配置中user设置为nobody有什么用?
Nginx配置中有一个关于user的设置,看到有的配置为: user nobody nobody; 这个对应的权限是怎样的呢?...
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Jan 27, 2021
in
Technique[技术]
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71.8m
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0
votes
304
views
1
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javascript - Django - How to pass the name of a button to views.py from jQuery dialog
How do you pass the name of a button to views.py from a jQuery dialog? I want to pass save_add from ... .pk, school_year=student.school_year) return FormView.post(self, request)...
asked
Jan 27, 2021
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Technique[技术]
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深蓝
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71.8m
points)
javascript
0
votes
342
views
1
answer
微信小程序的picker 可以精确到分吗
微信小程序的picker 可以精确到分吗? 看了mode = date 好像只支持到天...
asked
Jan 27, 2021
in
Technique[技术]
by
深蓝
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71.8m
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微信小程序的picker
0
votes
113
views
1
answer
javascript - Creating HTML Dynamic FORM using JS
I'm trying to create a dynamic form using JS and PHP, I've done the PHP part, where the user selects how many ... > The problem is, nothing shows up when the checkbox is checked....
asked
Jan 27, 2021
in
Technique[技术]
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深蓝
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71.8m
points)
javascript
0
votes
424
views
1
answer
arrays - golang prepend a string to a slice ...interface{}
I've a method that has as an argument v ...interface{}, I need to prepend this slice with a string. Here is the ... string in append What's the proper way to prepend in this case?...
asked
Jan 27, 2021
in
Technique[技术]
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深蓝
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71.8m
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arrays
0
votes
486
views
1
answer
请问actuator监控hikaricp的指标项是什么?
请求接口http://ip:port/actuator/metrics/hikaricp.connections.usage 返回: { "name": "hikaricp.connections.usage", "description": "Connection usage time", ... 连接总使用次数 连接总使用时间 但MAX猜不出是啥玩意....
asked
Jan 27, 2021
in
Technique[技术]
by
深蓝
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71.8m
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