我正在尝试从服务器发送一个Set()对象。但从客户端我得到一个空对象。socket.ionode.js
//server side
var set=new Set([1,2,3]);
socket.emit('set', set);
console.log(set); //Set(3) {1,2,3}
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//client side
socket.on('set',function(set){
console.log(set); //{}
});
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这是为什么 ?
{
"name": "IronMan",
"phone_number": "555555555",
"number_of_guest": 10,
"tables": [
2
],
"reservation_start_at": "2020-10-15T10:00:00.861873Z",
"reservation_end": "2020-10-15T11:00:00.861873Z"
}Run Code Online (Sandbox Code Playgroud)
我陷入了需要生成带有时区的未来日期和时间以发送邮递员请求的步骤。该请求与预订功能有关。
在请求正文中,键值是,
"reservation_start_at": "2020-10-15T10:00:00.861873Z"
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我的问题是,如何为每个请求生成未来的日期和时间?
提前致谢 。
设置:将数据库从 laravel 7 迁移到 laravel 8、Jetstream with Teams (php artisan jetstream:install惯性 --teams)、inertia.js
\nIlluminate\\Database\\Connection::runQueryCallback\nvendor/laravel/framework/src/Illuminate/Database/Connection.php:671`\n\nIlluminate\\Database\\QueryException\nSQLSTATE[42S22]: Column not found: 1054 Unknown column \'current_team_id\' in \'field list\' (SQL: update `users` set `current_team_id` = 1, `users`.`updated_at` = 2020-10-08 21:22:00 where `id` = 5)\nRun Code Online (Sandbox Code Playgroud)\n/* @throws \\Illuminate\\Database\\QueryException */ \nprotected function runQueryCallback($query, $bindings, Closure $callback)\n{\n // To execute the statement, we\'ll simply call the callback, which will actually\n // run the SQL against the PDO connection. Then we can calculate the time it\n // took …Run Code Online (Sandbox Code Playgroud) 在java中,我们可以像这样声明一个空类对象
VideoRecord videoRecord;
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之后,我们可以检查它是否为空
if (videoRecord == null){
videoRecord = new VideoRecord();
}
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我是 Kotlin 的新手,我想在 Kotlin 中做同样的事情。我已经尝试过下面的代码。
lateinit var videoRecord1:VideoRecord
if (videoRecord1 == null){
videoRecord1 = VideoRecord()
}
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但它给了我一个警告,就像条件videoRecord1 == null总是错误的一样。我怎样才能在 Kotlin 中做出同样的事情?
所以,我遇到了这个问题:我这里有这种类型的元素,显然在更改输入时有事件,是否可以像这样传递参数并访问事件?如果是这样,我该怎么办?
// this function accepts two other params index, stringValue
function onChange(index ,stringValue) {
console.log(event.target.value);
console.log("index?: " + index + " and value" + stringValue)
}
//this input is in Child Component
const index = 69;
const someRandomValue='iamstring';
<input defaultValue={name} onChange={onChange(index,iamstring)} />
Run Code Online (Sandbox Code Playgroud) 我正在尝试使用 Google API。我找到了一个方法:
GET https://analyticsadmin.googleapis.com/v1beta/{parent=properties/*}/conversionEvents
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有标记:
The URL uses gRPC Transcoding syntax.
我需要把我的价值放在 后面properties。
但我不明白,如何像通过 Postman 那样发送 HTTP 请求。我阅读了 API 的文章,但仍然无法获取它。尝试过 https://analyticsadmin.googleapis.com/v1beta/parent="properties/3177281"/conversionEvents
但总是出现404 Not Found
我正在使用谷歌数字墨水进行手写识别。需要下载一次的模型大小为20MB,下载需要一些时间。有没有办法使用进度条显示下载进度?
我的代码如下:
fun download(context: Context) {
var modelIdentifier: DigitalInkRecognitionModelIdentifier? = null
try {
modelIdentifier =
DigitalInkRecognitionModelIdentifier.fromLanguageTag(lang)
} catch (e: MlKitException) {
// language tag failed to parse, handle error.
}
model = DigitalInkRecognitionModel.builder(modelIdentifier!!).build()
val remoteModelManager = RemoteModelManager.getInstance()
remoteModelManager.download(model, DownloadConditions.Builder().build())
.addOnSuccessListener {
Log.i("StrokeManager", "Model downloaded")
Toast.makeText(context, "Model Downloaded", Toast.LENGTH_SHORT).show()
}
.addOnFailureListener { e: Exception ->
Log.e("StrokeManager", "Error while downloading a model: $e")
Toast.makeText(context, "Model Download Failed", Toast.LENGTH_SHORT).show()
}
}
Run Code Online (Sandbox Code Playgroud) raise ImproperlyConfigured("Error loading psycopg2 module: %s" % e) django.core.exceptions.ImproperlyConfigured: Error loading psycopg2 module: DLL load failed while importing _psycopg: The specified module could not be found.
我已经安装了 letest postgres 安装程序
已安装 psycopg2