我正在实现 aDataTable来显示一些数据,为此我正在使用 a PaginatedDataTable,这样我就可以加载并显示我的数据,问题是我的每行DataTable显示一个复选框,而我不想要它。
这是我目前的结果:
\n\n\n\n我想删除这些复选框,但我不知道该怎么做。
\n\n代码:
\n\nExpensesDataSource _expensesDataSource = ExpensesDataSource([expense]);\n\n Widget getDataTable() {\n return PaginatedDataTable(\n header: Text(\'Despesas\', style: TextStyle(color: Color(0xFF4C4C4C), fontWeight: FontWeight.bold, fontSize: 15),),\n columns: <DataColumn>[\n DataColumn(\n label: Text("Data"),\n numeric: false,\n ),\n DataColumn(\n label: Text("Descri\xc3\xa7\xc3\xa3o"),\n numeric: false,\n ),\n DataColumn(\n label: Text("Total"),\n numeric: false,\n ),\n ],\n source: _expensesDataSource,\n );\n }\n\n\nclass ExpensesDataSource extends DataTableSource {\n\n List<Expense> _expenses = <Expense>[];\n int _selectedCount = 0;\n\n ExpensesDataSource(List<Expense> listExpenses) {\n this._expenses …Run Code Online (Sandbox Code Playgroud) 我正在尝试为 AndroidStudio 项目设置一个 Flutter 常规库。为此,我正在遵循本教程:https ://github.com/flutter/flutter/wiki/Add-Flutter-to-existing-apps
在教程(Android)的第二步中,我必须配置settings.gradle文件来绑定lib,但是当我键入教程的代码时,Binding找不到对象。
设置.gradle
include ':app'
setBinding(new Binding([gradle: this])) // new
evaluate(new File( // new
settingsDir.parentFile, // new
'my_flutter/.android/include_flutter.groovy' // new
))
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我有导入选项,但没有一个有效。
导入选项
我有一个Material小部件来包装 aMaterialButton以制作边框半径,但我无法width为它设置属性。我尝试使用SizedBox但不起作用,Material小部件一直使用屏幕的所有空间。
代码:
return new SizedBox(
width: 40,
child: Material(
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(22.0)),
elevation: 18.0,
color: Color(0xFF801E48),
clipBehavior: Clip.antiAlias,
child: MaterialButton(
materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
height: 30.0,
child: new Text('Sair',
style:
new TextStyle(fontSize: 16.0, color: Colors.white)),
),
),
);
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结果:
显然它没有 40.0 的宽度大小。
请看下面的通量,它显示了我的问题。我正在使用 vue-routerthis.$router.push浏览页面。我从 PageA 开始。
PageA -> PageB (mounted()PageB 被称为)
PageB -> PageA(返回到PageA)
PageA -> PageB (mounted()的 PageB 不被调用)
听起来页面(.vue 组件)没有关闭并在缓存或其他东西上维护。mounted()每次打开该页面时我都必须使用该方法,并且可能关闭该页面并清除缓存。我该如何解决?
我在将预定功能部署到 Firebase 时遇到一些问题。这是我的问题之一。
\n在功能部署中,我可以捕获(我认为的)主要错误原因:
\nDetailed stack trace: TypeError: async_hooks_1.AsyncLocalStorage is not a constructor\nRun Code Online (Sandbox Code Playgroud)\n索引.js
\nconst functions = require("firebase-functions");\nconst admin = require("firebase-admin");\n\nadmin.initializeApp();\n\nexports.scheduledFunction = functions.pubsub\n .schedule("45 8 * * *")\n .timeZone("America/Sao_Paulo")\n .onRun(() => {\n console.log("Triggering email")\n return null;\n });\nRun Code Online (Sandbox Code Playgroud)\n部署
\n% firebase deploy --only functions \n\n=== Deploying to \'****\'...\n\ni deploying functions\nRunning command: npm --prefix "$RESOURCE_DIR" run lint\n\n> functions@ lint ****/functions\n> eslint .\n\n\xe2\x9c\x94 functions: Finished running predeploy script.\ni functions: preparing codebase default for deployment\ni functions: ensuring …Run Code Online (Sandbox Code Playgroud) javascript node.js firebase google-cloud-platform google-cloud-functions
我编写了一个接收http请求并发送电子邮件的函数.但我想发送消息pubsub,但在文档中的示例只显示触发的pubsub请求,并且没有主机,端口,id,代理的passwd等信息.我想收到一个http请求并向移动设备发送一条发布消息,我认为这是mqtt.
exports.weeklyEmail = functions.https.onRequest((req,res) => {
const email = '****@gmail.com'
console.log('Sending e-mail')
const mailOptions = {
to: email,
from: '****@alunos.utfpr.edu.br',
subject: 'Teste',
text: 'Conteudo do email '
}
mailTransport.sendMail(mailOptions).then(
() => {
res.send('Email sent')
}
).catch(error => {
res.send(error)
})
})
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我使用for_each循环创建了多个子网和多个 VPC 终端节点,如下所示:
### VARIABLES ###
variable "private_cidr_mask" {
default = {
"us-west-1a" = "10.0.1.0/24"
"us-west-1b" = "10.0.2.0/24"
}
}
variable "vpc_endpoints" {
default = [
"com.amazonaws.us-west-1.ecs-agent",
"com.amazonaws.us-west-1.ecs-telemetry",
"com.amazonaws.us-west-1.ecs"
]
}
### RESOURCES ###
resource "aws_subnet" "private_subnet" {
for_each = var.private_cidr_mask
vpc_id = aws_vpc.vpc.id
availability_zone = each.key
cidr_block = each.value
}
resource "aws_vpc_endpoint" "vpc_endpoint" {
for_each = toset(var.vpc_endpoints)
vpc_id = aws_vpc.vpc.id
vpc_endpoint_type = "Interface"
service_name = each.value
security_group_ids = [ aws_security_group.security_group.id ]
private_dns_enabled = true
}
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现在,我必须使用以下命令将每个 VPC …
我有一个枚举列表,有些项目有数字。我这样写:
\begin{enumerate}
\item Estado da arte:
\item Levantar os requisitos
\item Com o microcontrolador
\ref{figurametodo3}.
\begin{figure}[h!]
\begin{center}
\includegraphics[scale=0.6]{./dados/figuras/metodo_3}
\caption{Sistema para leitura da identificação de uma Tag}
\label{figurametodo3}
\end{center}
\end{figure}
\item Estudar
\begin{figure}[h]
\begin{center}
\includegraphics[scale=0.4]{./dados/figuras/metodo_4}
\caption{Comunicação entre o microcontrolador e o celular}
\label{figurametodo4}
\end{center}
\end{figure}
\item Desenvolver
\begin{figure}[h]
\begin{center}
\includegraphics[scale=0.6]{./dados/figuras/metodo_final}
\caption{Comunicação entre celulares e servidor}
\label{figura22}
\end{center}
\end{figure}
\end{enumerate}
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但它将列表下方的所有数字对齐,超出了我想要的位置。我希望我的数字保持在你的项目之下。名单内。
这是我第一次使用 Spring Cloud Gateway 实现。
我需要过滤每个请求并在某些路径上应用过滤器验证。按照 Baeldung 自定义过滤器教程,我制作了一个简单的应用程序来过滤请求。
应用程序必须释放路径,/actuator/health并验证后端服务的特定路径。到目前为止,我已经实现了 aGlobalFilter和 a GatewayFilterFactory。每个请求都会调用全局过滤器,但在应用程序启动时只调用一次 GatewayFilter,这样我就无法对每个请求进行身份验证。身份验证逻辑是关于特定的头字段。所以,我的颗粒化问题是:
全局过滤器
@Component
public class LoggingGlobalPreFilter implements GlobalFilter {
final Logger LOGGER = LoggerFactory.getLogger(LoggingGlobalPreFilter.class);
@Override
public Mono<Void> filter(
ServerWebExchange exchange,
GatewayFilterChain chain) {
LOGGER.info("Global Pre Filter executed");
return chain.filter(exchange);
}
}
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网关过滤器
@Component
public class LoggingGatewayFilterFactory extends
AbstractGatewayFilterFactory<LoggingGatewayFilterFactory.Config> {
final Logger LOGGER =
LoggerFactory.getLogger(LoggingGatewayFilterFactory.class);
public LoggingGatewayFilterFactory() {
super(Config.class);
}
private Mono<Void> onError(ServerWebExchange exchange, String err, HttpStatus httpStatus) {
ServerHttpResponse response …Run Code Online (Sandbox Code Playgroud) java spring spring-cloud spring-cloud-security spring-cloud-gateway