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Excel导出Laravel 5.6

I need to hide a specific column while exporting data I am using laravel5.6 and "maatwebsite/excel": "^3.0" I have to create a dynamic header excel in which i need one specific column to be passed

语法有什么不对吗?如果从循环中出来并显示消息。

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: String sql="Select * from Books where BookID=?"; try{

SQL线程池查询示例

Can any one please share a simple code to understand SQL thraed pool example in Apache Ignite,I try to execute a simple SQL query which insert records in table by using SQL thread pool.

使用大的导航标题和适合的文本

Navigation bar image I have issue with navigation bar title. First of all I am using large titles with: navigationController?.navigationBar.prefersLargeTitles = true navigationItem.

我在WordPress和日历上工作,想改变所选日期的颜色而不是整周。

I am working on the calendar and want to change the color of selected date only not the whole one this is the attached image image

填写导航属性的最佳方法?

Lets say we have a class Student public class Student { public int ID{get; set;} public string Name{get; set;} public int TeacherID{get; set;} public Teacher Teacher{get; set;} } Whats the best way

Uncaught TypeError:不能读取属性

Script is for deleting messages via Discord utilizing the ID at the top. Can't seem to figure out how to fix the error I'm getting. var before = '336607993439453184'; clearMessages = function(){

不要在Ubuntu上重新启动ApACE2

After run sudo service apache2 restart show this error: ● apache2.service - The Apache HTTP Server Loaded: loaded (/lib/systemd/system/apache2.service; enabled; vendor preset: enabled) Active: failed

在Python TKiter中构建应用程序

I want to build an application in python, by which the user can mark the status of the files/folder as important, non-important, started, finished etc. I am thinking to use the tkinter python

QNA制造商-管理层价格资源不可用

I'm attempting to create a QnA maker on azure, following the tutorials provided, and I'm attempting to create it as a resource but every-time I do I need to select a management pricing tier, however

如何访问非80端口应用程序时隐藏非80%端口号?

The server is running IIS using port 80, the new apache server 8083 port is used for other services. Now I want to access the www.aaacom:8083 domain name how to hide the 8083 port number?

反应本地配置返回错误500,接着反应本地文档

I have followed all instruction as in docs, but couldn't start my first react native app.Node -v v8.11.4, npm 4.6.1, react-native-cli 2.0.1 See Error Image Here

滚动到一个位置并左移

I have following numbered pages, when user on a page, initial pagination number must be the user current page number. i have used <ScrollView ref={(view) => this._scrollView = view}>

如何在JavaScript(不是jQuery)中的给定日期下个月获得同一天

I'm currently working on calendar booking and if a client booked an event to occur on monthly basis but same day the first , then I will mark the calendar the same day next month based on the start

错误:没有选择文件

I want to open a tiff file, but didn't open The console shows: dlg2 = <wx._core.FileDialog object at 0x000000000D6FC318> path = C:\Users\SPSL\Desktop\python.HY\

条纹托管发票总能公开查看吗?有没有办法让它成为私人的?

Stripe invoice hosted at pay.stripe.com seems to be always publicly viewable by anyone. When I googled "pay.stripe.com", I can find and see other business's Stripe invoices as well. Is there a way

替换字节数组中的多个字节

I have a byte array like so var byteArray = new byte[] { 0x9C, 0x50, 0x53, 0x51, 0x52, 0x41, 0x50, 0x41, 0x51, 0x41, 0x52, 0x41, 0x53, 0x48, 0x83, 0xEC, 0x28,

使用NoDJS中的DO while循环检查FiLASH数据库中存在的问题

When a user registers a new account, I want to generate a reference code. I'm using the do-while loop for checking exists of the reference code in the database but the loop keeps running at least 2

ASP.NET核心升级从2到2.1——类型和引用

I've ran through the .NET Core 2.0 to 2.1 update from Microsoft here: https://docs.microsoft.com/en-us/aspnet/core/migration/20_21?view=aspnetcore-2.1 Most of the app runs and starts without issue

如何在WooCommerce中添加航运方法下的选择框

I'm trying to customize the WC checkout page. In my checkout page I've set 2 shipping methods. My goal is to add a custom field down below the first shipping method. To achieve this I used the hook I

回调方法中的上下文为空

I have written the following class: public class Test { private final Context context; public Test(Context context){ this.context = context; } public void func(){ PingApi pingApi = new

如何利用CART.JS绘制雷达图中的水平线

i want to draw a line in particular point like 50 in Radar chart using the chart.js ?

在[UITababVIEW-PrimFrestReunDeleDeDeDeSECTRORION]中的断言失败:

In My App,We Users reports a bug like the image,error info,and we have catched some error log like the title(below is the detail info),I am not clear understand what the error occured and what's

神经网络在人脸识别中的应用

I developed the face recognition application in android using neural networks and library I used for Neural networks in MPL Java. I followed the research paper to accomplish this task the Paper link

JS码二次不自举模型

I have following code in a Partial View in an MVC project: $(document).ready(function () { $("#@Html.IdFor(m => m.AanwezigheidChauffeurID)").change(function () { setModalBody("busy", "

Python如何仅显示一次for循环?

I am trying to iterate column of alphabet in 'new.xlsx', and if the alphabet exists in 'original.xlsx', then copy the data and paste into new.xlsx. The code following is what I have done. import

不显示来自公用文件夹的图像

i m create api for get image from server and show user but when enter url in server show (Sorry, the page you are looking for could not be found.) notice: request work in localhost

C语言与初始化列表

the question about effective modern c++ item 2: auto x3={27};// x3's type is std::initializer_list auto x4{27}; // x4's type is std::initializer_list but when I test x4's type , I found the type of

除非调试,否则Excel崩溃。

An Excel spreadsheet crashes whenever I start Excel and run a VBA macro. However, when I debug line-by-line, it does not crash anywhere, and it will continue not-crashing, even w\o this 'debugging

在JavaScript中复制布尔值从一个函数到另一个函数[复制]

I want to check if the data is already in the database to avoid duplication. The column is not primary key so I need to query what's in the database and compare the data from the current input if

颜色计数后性能不良

I have a problem with bad performance after implementing this code into my Excellist to count filled cells without a color in the set range. Function CountCcolor(range_data As Range, criteria As

Ruby on Rails——AutoPoFi修器不支持节点V4.91。更新它。如何修复?

Working on a Rails app. Coworker pushed new commits to master with some new gems installed. Then I pulled the master branch to the local branch where I work on, the app breaks and displays the error

角度6:在页面停留时更改URL参数

In my angular6 application i have overview page and a detail page, the user can add a new item by navigating to http://localhost:4200/investigation/102/relatedevent/0/0 where the last two 0 let the

我想改变DATAGRID选择的行高,而DATAGRID中的数据保持不变。

On selection, I want to change DataGrid Selected row height. I used two methods. 1) I added an expander in DataGrid <DataGrid x:Name="bookings_dg" Expander.Expanded="Expander_Expanded"

如何解决JavaScript中的时间戳错误

I want to get current time and date using this below timestamp format. 2018-08-20T07:38:27.602Z Then I have created a method to get this. So, when I console.log("Timestamp - " +timestampama); ,

如何将JSON对象绑定到角材料形式

I'm currently making a simple form using angular framework with the json file given to me. Inside the json were some arrays and objects. Well, I successfully binded the json arrays. My problem now is

在Ubuntu从16.04升级到18.04之后,RMAGICK失败了

when i start rails server, server is not started It is showing following Error when i start rails server, server is not started It is showing following Error /home/effectech/.rbenv/versions/2.2.0/

如何开展红雷新项目?

How is it that on my "Projects" page on Redmine, even once connected, there's no "New Project" link anywhere to be found? Contrary to the demo version. My account Their demo Thank you very much in

WKHTMLTOPDF退出代码1由于网络错误:HooNoDungDror

I'm running wkhtmltopdf 0.12.1.4 (with patched qt) from a Django application using django-wkhtmltopdf. On my PC it is running fine, but when I load onto a DigitalOcean VPS it is generating the

通过Moodle从MLDLUSER注册中计时

I not find a Moodle's api that I get "timecreated" from "mdl_user_enrolments" table via api. Is there a solution? Thanks!

无法从服务器下载Android中的APK文件

I want to download one app (apk) file is available under my server path I have tried with below code: public static void downloadInstall(String apkurl){ try { URL url = new URL(apkurl);

在Apache服务器MPM WorksV72.0.10上配置20000个并发请求的配置

Our web application receives 20000 concurrent visits and we need help to configure apache. The cPanel version 72.0.10 and Server MPM is in worker mode. We tried different approaches but all failed.

Pscp(腻子)有时在重复的SSH握手时挂起。

I have a Problem with the putty tool pscp. I check if Linux VM (Red Hat Enterprise Linux Server 7.4) "TARGET" is alive and store a timestamp on the TARGET in a file. I do this all 10s from a Windows

Java.Lang.CytNoNokDebug:NET.RooDeV.javaFa.StaseSt陷入水池

I getjava.lang.ClassNotFoundException: net.rootdev.javardfa.StatementSink when trying SpreadsheetDocument doc = SpreadsheetDocument.newSpreadsheetDocument(); I'm using xerce if that means something.

如何使用Python多线程并行使用SCP命令?

I am using SCP command using os.system() to send files to another Server using python multi-threading. But SCP is working in case of single threads, but not in multi-threads and raise an error of

将S3事件通知发送到特定lambda别名或版本的方法

As the title of the question, Is there any way to send S3 event notification to specific alias or version of lambda function? I tried to put lambda ARN with a version like arn:aws:lambda:ap-

DB2中的标识列

I have created a dummy table in Db2 using an identity column. DDL of which is shared below: CREATE TABLE new_employees ( sl_no int, ident smallint generated always as identity (start with 1,

PyQt,用SqLITE3保存恢复动态组合框项

I am working with Python PyQt, and I had to save logs with database, so I have used Sqlite3. In my project, user can change values and sends values with PySerial.(Totally 9 values, data of Textlines,

如何使用NoDE.JS或CDN为本地机器创建现有目录的ZIP

How to create a zip for existing directory in local machine using Node .js or CDN

给定很少的输入特征和返回决策路径的SCIKIT DEXISE TreReReSurSoR树中的最小值

I have a regression tree that predicts production times on the basis of seven input features. The lower the production time the better. Now I want to determine for 2 to 3 input features what the

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