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≈。彩虹 2025-02-20 23:50:54

如果您的代码在Python 2和3中都可以使用，则可以通过在程序开始时加载它来实现此目标：

from __future__ import print_function   # If code has to work in Python 2 and 3!

然后，您可以以Python 3方式打印：

print("python")

如果您想打印某些东西而不创建新行 - 您可以可以这样做：

for number in range(0, 10):
    print(number, end=', ')

If your code should work in both Python 2 and 3, you can achieve this by loading this at the beginning of your program:

from __future__ import print_function   # If code has to work in Python 2 and 3!

Then you can print in the Python 3 way:

print("python")

If you want to print something without creating a new line - you can do this:

for number in range(0, 10):
    print(number, end=', ')

“语法”是什么：在呼叫到“ print”中缺少括号。在python中的意思？

笑红尘 2025-02-13 23:50:54 浏览 2 评论 0 收藏 0

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≈。彩虹 2025-02-20 12:39:33

在document.getElementById中，您忘了将``''添加到mullkompressenamount id。

固定的：

<!DOCTYPE html>
<html>
<head>
</head>
<body>
  <table>
    <tr>
      <th>Kosmetikartikel</th>
      <th>Menge</th>
    </tr>
    <tr>
      <td>Waschlotion</td>
      <td><input id="WaschlotionAmount"></td>
    </tr>
    <tr>
      <td>Haarshampoo</td>
      <td><input id="HaarshampooAmount"></td>
    </tr>
    <tr>
      <td>Bodylotion</td>
      <td><input id="BodylotionAmount"></td>
    </tr>
    <tr>
      <td>Wundschutzcreme</td>
      <td><input id="WundschutzcremeAmount"></td>
    </tr>
    <tr>
      <td>Deospray</td>
     <td><input id="DeosprayAmount"></td>
   </tr>
   <tr>
    <td>Zahncreme</td>
    <td><input id="ZahncremeAmount"></td>
  </tr>
  <tr>
   <td>Zahnbürste</td>
   <td><input id="ZahnbuersteAmount"></td>
 </tr>
 <tr>
  <td>Zahnspüllbecher</td>
  <td><input id="ZahnspuellbecherAmount"></td>
</tr>
   <tr>
    <td>Zahnhaftcreme</td>
    <td><input id="ZahnhaftcremeAmount"></td>
  </tr>
  <tr>
    <td>Zahnreinigunstabs</td>
    <td><input id="ZahnreinigunstabsAmount"></td>
  </tr>
  <tr>
    <td>Rasierklingen</td>
    <td><input id="RasierklingenAmount"></td>
  </tr>
  <tr>
    <td>Rasierer mit Klingen</td>
    <td><input id="RasiererMitKlingenAmount"></td>
  </tr>
  <tr>
    <td>Rasierschaum</td>
    <td><input id="RasierschaumAmount"></td>
  </tr>
  <tr>
    <td>Einwegrasierer</td>
    <td><input id="EinwegrasiererAmount"></td>
  </tr>
  <tr>
    <td>Zahnreinigunsbecher</td>
    <td><input id="ZahnreinigunsBecherAmount"></td>
  </tr>
  <tr>
    <td>Mullkompressen</td>
    <td><input id="MullkompressenAmount"></td>
  </tr>
  <tr>
    <td><b>Gesamtpreis</b></td>
    <td><p id="Sum"></p></td>
  </tr>
</table>

<button onclick="Calculate()">Rechnen</button>
<button  onclick="document.getElementById(`MullkompressenAmount`).value = ''">Löschen</button>
</body>
<script>
var Waschlotion = 1.30;
var Haarshampoo = 1.50;
var Bodylotion = 3;
var Wundschutzcreme = 4.80;
var Deospray = 1.80;
var Zahncreme = 3.20;
var Zahnbuerste = 1;
var Zahnspuellbecher = 1.25;
var Zahnhaftcreme = 1.50;
var Zahnreinigunstabs = 3.20;
var Rasierklingen = 2.49;
var RasiererMitKlingen = 4.50;
var Rasierschaum = 1.40;
var Einwegrasierer = 2;
var ZahnreinigunsBecher = 5;
var Mullkompressen = 6;

let Sum;

let WaschlotionAmount;
let HaarshampooAmount;
let BodylotionAmount;
let WundschutzcremeAmount;
let DeosprayAmount;
let ZahncremeAmount;
let ZahnbuersteAmount;
let ZahnspuellbecherAmount;
let ZahnhaftcremeAmount;
let ZahnreinigunstabsAmount;
let RasierklingenAmount;
let RasiererMitKlingenAmount;
let RasierschaumAmount;
let EinwegrasiererAmount;
let ZahnreinigunsBecherAmount;
let MullkompressenAmount;



function Calculate() {
  if (Sum != 0) {
    Sum = 0;
  }
  let WaschlotionAmount = document.getElementById("WaschlotionAmount").value;
  let HaarshampooAmount = document.getElementById("HaarshampooAmount").value;
  let BodylotionAmount = document.getElementById("BodylotionAmount").value;
  let WundschutzcremeAmount = document.getElementById("WundschutzcremeAmount").value;
  let DeosprayAmount = document.getElementById("DeosprayAmount").value;
  let ZahncremeAmount = document.getElementById("ZahncremeAmount").value;
  let ZahnbuersteAmount = document.getElementById("ZahnbuersteAmount").value;
  let ZahnspuellbecherAmount = document.getElementById("ZahnspuellbecherAmount").value;
  let ZahnhaftcremeAmount = document.getElementById("ZahnhaftcremeAmount").value;
  let ZahnreinigunstabsAmount = document.getElementById("ZahnreinigunstabsAmount").value;
  let RasierklingenAmount = document.getElementById("RasierklingenAmount").value;
  let RasiererMitKlingenAmount = document.getElementById("RasiererMitKlingenAmount").value;
  let RasierschaumAmount = document.getElementById("RasierschaumAmount").value;
  let EinwegrasiererAmount = document.getElementById("EinwegrasiererAmount").value;
  let ZahnreinigunsBecherAmount = document.getElementById("ZahnreinigunsBecherAmount").value;
  let MullkompressenAmount = document.getElementById("MullkompressenAmount").value;

  Sum = (Waschlotion * WaschlotionAmount) + (Haarshampoo * HaarshampooAmount) + (Bodylotion * BodylotionAmount) +
  (Wundschutzcreme * WundschutzcremeAmount) + (Deospray * DeosprayAmount) + (Zahncreme * ZahncremeAmount) +
  (Zahnbuerste * ZahnbuersteAmount) + (Zahnspuellbecher * ZahnspuellbecherAmount) + (Zahnhaftcreme * ZahnhaftcremeAmount) +
  (Zahnreinigunstabs * ZahnreinigunstabsAmount) + (Rasierklingen * RasierklingenAmount) + (RasiererMitKlingen * RasiererMitKlingenAmount) +
  (Rasierschaum * RasierschaumAmount) + (Einwegrasierer * EinwegrasiererAmount) + (ZahnreinigunsBecher * ZahnreinigunsBecherAmount) + (Mullkompressen * MullkompressenAmount);
  document.getElementById("Sum").innerHTML = Sum;
}


 </script>
</html>

In document.getElementById you forgot to add `` to the MullkompressenAmount id.

Fixed:

<!DOCTYPE html>
<html>
<head>
</head>
<body>
  <table>
    <tr>
      <th>Kosmetikartikel</th>
      <th>Menge</th>
    </tr>
    <tr>
      <td>Waschlotion</td>
      <td><input id="WaschlotionAmount"></td>
    </tr>
    <tr>
      <td>Haarshampoo</td>
      <td><input id="HaarshampooAmount"></td>
    </tr>
    <tr>
      <td>Bodylotion</td>
      <td><input id="BodylotionAmount"></td>
    </tr>
    <tr>
      <td>Wundschutzcreme</td>
      <td><input id="WundschutzcremeAmount"></td>
    </tr>
    <tr>
      <td>Deospray</td>
     <td><input id="DeosprayAmount"></td>
   </tr>
   <tr>
    <td>Zahncreme</td>
    <td><input id="ZahncremeAmount"></td>
  </tr>
  <tr>
   <td>Zahnbürste</td>
   <td><input id="ZahnbuersteAmount"></td>
 </tr>
 <tr>
  <td>Zahnspüllbecher</td>
  <td><input id="ZahnspuellbecherAmount"></td>
</tr>
   <tr>
    <td>Zahnhaftcreme</td>
    <td><input id="ZahnhaftcremeAmount"></td>
  </tr>
  <tr>
    <td>Zahnreinigunstabs</td>
    <td><input id="ZahnreinigunstabsAmount"></td>
  </tr>
  <tr>
    <td>Rasierklingen</td>
    <td><input id="RasierklingenAmount"></td>
  </tr>
  <tr>
    <td>Rasierer mit Klingen</td>
    <td><input id="RasiererMitKlingenAmount"></td>
  </tr>
  <tr>
    <td>Rasierschaum</td>
    <td><input id="RasierschaumAmount"></td>
  </tr>
  <tr>
    <td>Einwegrasierer</td>
    <td><input id="EinwegrasiererAmount"></td>
  </tr>
  <tr>
    <td>Zahnreinigunsbecher</td>
    <td><input id="ZahnreinigunsBecherAmount"></td>
  </tr>
  <tr>
    <td>Mullkompressen</td>
    <td><input id="MullkompressenAmount"></td>
  </tr>
  <tr>
    <td><b>Gesamtpreis</b></td>
    <td><p id="Sum"></p></td>
  </tr>
</table>

<button onclick="Calculate()">Rechnen</button>
<button  onclick="document.getElementById(`MullkompressenAmount`).value = ''">Löschen</button>
</body>
<script>
var Waschlotion = 1.30;
var Haarshampoo = 1.50;
var Bodylotion = 3;
var Wundschutzcreme = 4.80;
var Deospray = 1.80;
var Zahncreme = 3.20;
var Zahnbuerste = 1;
var Zahnspuellbecher = 1.25;
var Zahnhaftcreme = 1.50;
var Zahnreinigunstabs = 3.20;
var Rasierklingen = 2.49;
var RasiererMitKlingen = 4.50;
var Rasierschaum = 1.40;
var Einwegrasierer = 2;
var ZahnreinigunsBecher = 5;
var Mullkompressen = 6;

let Sum;

let WaschlotionAmount;
let HaarshampooAmount;
let BodylotionAmount;
let WundschutzcremeAmount;
let DeosprayAmount;
let ZahncremeAmount;
let ZahnbuersteAmount;
let ZahnspuellbecherAmount;
let ZahnhaftcremeAmount;
let ZahnreinigunstabsAmount;
let RasierklingenAmount;
let RasiererMitKlingenAmount;
let RasierschaumAmount;
let EinwegrasiererAmount;
let ZahnreinigunsBecherAmount;
let MullkompressenAmount;



function Calculate() {
  if (Sum != 0) {
    Sum = 0;
  }
  let WaschlotionAmount = document.getElementById("WaschlotionAmount").value;
  let HaarshampooAmount = document.getElementById("HaarshampooAmount").value;
  let BodylotionAmount = document.getElementById("BodylotionAmount").value;
  let WundschutzcremeAmount = document.getElementById("WundschutzcremeAmount").value;
  let DeosprayAmount = document.getElementById("DeosprayAmount").value;
  let ZahncremeAmount = document.getElementById("ZahncremeAmount").value;
  let ZahnbuersteAmount = document.getElementById("ZahnbuersteAmount").value;
  let ZahnspuellbecherAmount = document.getElementById("ZahnspuellbecherAmount").value;
  let ZahnhaftcremeAmount = document.getElementById("ZahnhaftcremeAmount").value;
  let ZahnreinigunstabsAmount = document.getElementById("ZahnreinigunstabsAmount").value;
  let RasierklingenAmount = document.getElementById("RasierklingenAmount").value;
  let RasiererMitKlingenAmount = document.getElementById("RasiererMitKlingenAmount").value;
  let RasierschaumAmount = document.getElementById("RasierschaumAmount").value;
  let EinwegrasiererAmount = document.getElementById("EinwegrasiererAmount").value;
  let ZahnreinigunsBecherAmount = document.getElementById("ZahnreinigunsBecherAmount").value;
  let MullkompressenAmount = document.getElementById("MullkompressenAmount").value;

  Sum = (Waschlotion * WaschlotionAmount) + (Haarshampoo * HaarshampooAmount) + (Bodylotion * BodylotionAmount) +
  (Wundschutzcreme * WundschutzcremeAmount) + (Deospray * DeosprayAmount) + (Zahncreme * ZahncremeAmount) +
  (Zahnbuerste * ZahnbuersteAmount) + (Zahnspuellbecher * ZahnspuellbecherAmount) + (Zahnhaftcreme * ZahnhaftcremeAmount) +
  (Zahnreinigunstabs * ZahnreinigunstabsAmount) + (Rasierklingen * RasierklingenAmount) + (RasiererMitKlingen * RasiererMitKlingenAmount) +
  (Rasierschaum * RasierschaumAmount) + (Einwegrasierer * EinwegrasiererAmount) + (ZahnreinigunsBecher * ZahnreinigunsBecherAmount) + (Mullkompressen * MullkompressenAmount);
  document.getElementById("Sum").innerHTML = Sum;
}


 </script>
</html>

我的按钮清除所有输入字段无法工作

我三岁 2025-02-13 12:39:32 浏览 1 评论 0 收藏 0

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≈。彩虹 2025-02-19 16:48:13

我曾经有同样的问题。我从build.gradle

//实现平台上删除firebase（'com.google.firebase：firebase-bom：29.0.4'）

也将firebase降级到29.0.2也正在工作。

superClass androidx.core.app.f of androidx.activity.com宣称最终

梦里梦着梦中梦 2025-02-12 16:48:13 浏览 3 评论 0 收藏 0

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≈。彩虹 2025-02-19 12:34:40

昨晚遇到了同样的问题，我的所有计划无头测试。

无论是否登录用户，它们都会运行，并且不存储密码。我没有使用具有最高特权的运行。

这些动作是完整的路径，而无需使用Run。

不确定为什么他们在2 1/2年（其中一些）跑步时会大大失败。

收到错误和“ 0x1”在Windows任务时间表中

怎言笑 2025-02-12 12:34:40 浏览 3 评论 0 收藏 0

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≈。彩虹 2025-02-19 07:06:32

您必须使用getfullinfo方法。

此外，MTPROTO客户端不能总是从ID开始的用户解决：他们必须在某些其他上下文（一个私人聊天，一个组）之前与用户见面，以缓存他们的信息。
用户名还可以触发此信息的缓存：尝试传递用户名而不是ID。

MadelineProto还具有可选的cacheallpeersonStartup 可以启用对话框列表中的所有用户和组自动启动。

MadelineProto内部同行数据库错误尝试GetfulLuser时

故乡的云 2025-02-12 07:06:32 浏览 1 评论 0 收藏 0

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≈。彩虹 2025-02-18 19:01:04

使用控制器添加listView。考虑一张高度200的卡。现在，如果控制器偏移量为800，则播放该800/200的视频。这是第四。您可以使用任何可以选择并停止视频的视频播放器软件包

如何自动播放视频，例如flutter上的YouTube应用程序中的视频？

人海汹涌 2025-02-11 19:01:04 浏览 3 评论 0 收藏 0

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≈。彩虹 2025-02-18 14:25:36

尝试以下操作：（创建扩展方法）

public static List<T> ExecuteQuery<T>(this dbContext db, string query) where T : class, new()
        {
            using (var command = db.Database.GetDbConnection().CreateCommand())
            {
                command.CommandText = query;
                command.CommandType = CommandType.Text;

                db.Database.OpenConnection();

                using (var reader = command.ExecuteReader())
                {
                    var lst = new List<T>();
                    var lstColumns = new T().GetType().GetProperties(BindingFlags.DeclaredOnly | BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic).ToList();
                    while (reader.Read())
                    {
                        var newObject = new T();
                        for (var i = 0; i < reader.FieldCount; i++)
                        {
                            var name = reader.GetName(i);
                            PropertyInfo prop = lstColumns.FirstOrDefault(a => a.Name.ToLower().Equals(name.ToLower()));
                            if (prop == null)
                            {
                                continue;
                            }
                            var val = reader.IsDBNull(i) ? null : reader[i];
                            prop.SetValue(newObject, val, null);
                        }
                        lst.Add(newObject);
                    }

                    return lst;
                }
            }
        }

用法：

var db = new dbContext();
string query = @"select ID , Name from People where ... ";
var lst = db.ExecuteQuery<PeopleView>(query);

我的模型：（不在dbset中）：

public class PeopleView
{
    public int ID { get; set; }
    public string Name { get; set; }
}

在.netcore 2.2和3.0中测试。

注意：此解决方案的性能缓慢

try this: (create extension method)

public static List<T> ExecuteQuery<T>(this dbContext db, string query) where T : class, new()
        {
            using (var command = db.Database.GetDbConnection().CreateCommand())
            {
                command.CommandText = query;
                command.CommandType = CommandType.Text;

                db.Database.OpenConnection();

                using (var reader = command.ExecuteReader())
                {
                    var lst = new List<T>();
                    var lstColumns = new T().GetType().GetProperties(BindingFlags.DeclaredOnly | BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic).ToList();
                    while (reader.Read())
                    {
                        var newObject = new T();
                        for (var i = 0; i < reader.FieldCount; i++)
                        {
                            var name = reader.GetName(i);
                            PropertyInfo prop = lstColumns.FirstOrDefault(a => a.Name.ToLower().Equals(name.ToLower()));
                            if (prop == null)
                            {
                                continue;
                            }
                            var val = reader.IsDBNull(i) ? null : reader[i];
                            prop.SetValue(newObject, val, null);
                        }
                        lst.Add(newObject);
                    }

                    return lst;
                }
            }
        }

Usage:

var db = new dbContext();
string query = @"select ID , Name from People where ... ";
var lst = db.ExecuteQuery<PeopleView>(query);

my model: (not in DbSet):

public class PeopleView
{
    public int ID { get; set; }
    public string Name { get; set; }
}

tested in .netCore 2.2 and 3.0.

Note: this solution has the slow performance

RAW SQL查询无DBSET-实体框架核心

假扮的天使 2025-02-11 14:25:36 浏览 3 评论 0 收藏 0

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≈。彩虹 2025-02-18 13:52:58

根据 plotly document 在时间序列上，您可以使用update_xaxes更改X轴标签的出现和格式的方法：

fig = go.Figure()
fig.add_trace(go.Scatter(x=df1["month"], y=df1["counts"], name="counts history"))
fig.update_xaxes(dtick="M1", tickformat="%Y-%m")
fig.show()

As per the plotly documentation on time series, you can use the update_xaxes method to change the ocurrence and format of the x-axis labels:

fig = go.Figure()
fig.add_trace(go.Scatter(x=df1["month"], y=df1["counts"], name="counts history"))
fig.update_xaxes(dtick="M1", tickformat="%Y-%m")
fig.show()

Plotly Graph不能正确显示X轴值

月朦胧 2025-02-11 13:52:58 浏览 2 评论 0 收藏 0

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≈。彩虹 2025-02-18 12:17:38

您应该逐个类型，而不是类型的数组。它是一个包含数组的单个对象，但根JSON不是数组。

var birdRecords = JsonConvert.DeserializeObject<birdDataSolutionVM>(data);

You should be deserializing into the type, not an array of the type. It's a single object containing an array, but the root json is not an array.

var birdRecords = JsonConvert.DeserializeObject<birdDataSolutionVM>(data);

jsonconvert.deserializeObject错误，当时启用字符串

金橙橙 2025-02-11 12:17:38 浏览 2 评论 0 收藏 0

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≈。彩虹 2025-02-18 11:18:37

在for循环外部写下Console.Writeline（），以避免在每个步骤中打印它。

我是在计算系列中的数字总和，但我只希望控制台输出最终总和，但我不知道如何

笑咖 2025-02-11 11:18:37 浏览 1 评论 0 收藏 0

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≈。彩虹 2025-02-18 09:40:09

在许多情况下，这种解析将需要，但是您很幸运：在这种情况下，有一个非常简单的解决方案。与其尝试将它们全部捕获为有效输入，只需解析一个，然后将其余的作为$（$ tt）*：

macro_rules! script {
    ($val:literal ! $($vals:tt)*) => {
        script!($($vals)*).prepend(format!("{}!", $val))
    };
    ($cmd:ident ! $($vals:tt)*) => {
        script!($($vals)*).prepend(format!("{}!", stringify!($cmd)))
    };
    (!$val:literal $($vals:tt)*) => {
        script!($($vals)*).prepend(format!("!{}", $val))
    };
    (!$cmd:ident $($vals:tt)*) => {
        script!($($vals)*).prepend(format!("!{}", stringify!($cmd)))
    };
    () => {
        Script::new(String::new())
    };
}

至于扭转订单，我建议您不要打扰。即使是这样 - 您只需要附加到向量的末尾，然后 recters（） IT。但是，为了娱乐，可能是可能的，但需要推下堆积。这是一个示例：

macro_rules! script_impl {
    {
        [ $($parsed:tt)* ]
        $val:literal !
        $($rest:tt)*
    } => {
        script_impl! {
            [
                // The parentheses are important for it to be one `tt`.
                // I choose parentheses to because they're still valid
                // expression producing `&str` (although braces will
                // also do, but brackets not).
                ( concat!(stringify!($val), "!") )
                $($parsed)*
            ]
            $($rest)*
        }
    };
    {
        [ $($parsed:tt)* ]
        ! $val:literal
        $($rest:tt)*
    } => {
        script_impl! {
            [
                ( concat!("!", stringify!($val)) )
                $($parsed)*
            ]
            $($rest)*
        }
    };
    {
        [ $($parsed:tt)* ]
        $cmd:ident !
        $($rest:tt)*
    } => {
        script_impl! {
            [
                ( concat!(stringify!($cmd), "!") )
                $($parsed)*
            ]
            $($rest)*
        }
    };
    {
        [ $($parsed:tt)* ]
        ! $cmd:ident
        $($rest:tt)*
    } => {
        script_impl! {
            [
                ( concat!("!", stringify!($cmd)) )
                $($parsed)*
            ]
            $($rest)*
        }
    };
    {
        [ $first_parsed:tt $($rest_parsed:tt)* ]
        // Finished parsing
    } => {
        Script::new($first_parsed)
            $( .append($rest_parsed) )*
    };
}
macro_rules! script {
    ( $($t:tt)* ) => {
        script_impl! {
            [ ]
            $($t)*
        }
    }
}

In many case such parsing will require push-down accumulation, but you are lucky: there is a very simple solution in this case. Instead of trying to capture them all as valid input, just parse one and forward the rest as $($tt)*:

macro_rules! script {
    ($val:literal ! $($vals:tt)*) => {
        script!($($vals)*).prepend(format!("{}!", $val))
    };
    ($cmd:ident ! $($vals:tt)*) => {
        script!($($vals)*).prepend(format!("{}!", stringify!($cmd)))
    };
    (!$val:literal $($vals:tt)*) => {
        script!($($vals)*).prepend(format!("!{}", $val))
    };
    (!$cmd:ident $($vals:tt)*) => {
        script!($($vals)*).prepend(format!("!{}", stringify!($cmd)))
    };
    () => {
        Script::new(String::new())
    };
}

Playground.

As for reversing the order, I'd recommend you to not bother. This can be very efficient even as is - you just need to append to the end of the vector then reverse() it. However, for the sake of fun, it is possible but requires push-down accumulation. Here's an example:

macro_rules! script_impl {
    {
        [ $($parsed:tt)* ]
        $val:literal !
        $($rest:tt)*
    } => {
        script_impl! {
            [
                // The parentheses are important for it to be one `tt`.
                // I choose parentheses to because they're still valid
                // expression producing `&str` (although braces will
                // also do, but brackets not).
                ( concat!(stringify!($val), "!") )
                $($parsed)*
            ]
            $($rest)*
        }
    };
    {
        [ $($parsed:tt)* ]
        ! $val:literal
        $($rest:tt)*
    } => {
        script_impl! {
            [
                ( concat!("!", stringify!($val)) )
                $($parsed)*
            ]
            $($rest)*
        }
    };
    {
        [ $($parsed:tt)* ]
        $cmd:ident !
        $($rest:tt)*
    } => {
        script_impl! {
            [
                ( concat!(stringify!($cmd), "!") )
                $($parsed)*
            ]
            $($rest)*
        }
    };
    {
        [ $($parsed:tt)* ]
        ! $cmd:ident
        $($rest:tt)*
    } => {
        script_impl! {
            [
                ( concat!("!", stringify!($cmd)) )
                $($parsed)*
            ]
            $($rest)*
        }
    };
    {
        [ $first_parsed:tt $($rest_parsed:tt)* ]
        // Finished parsing
    } => {
        Script::new($first_parsed)
            $( .append($rest_parsed) )*
    };
}
macro_rules! script {
    ( $($t:tt)* ) => {
        script_impl! {
            [ ]
            $($t)*
        }
    }
}

Playground.

坚持写一个递归的锈蚀声明性宏观宏观

鸵鸟症 2025-02-11 09:40:09 浏览 2 评论 0 收藏 0

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≈。彩虹 2025-02-18 02:08:29

您可以在请求参数中从前端发送客户端ID。示例：http：yourdomain：端口/路线/：

后端中的食谱您可以这样处理：

router.get('/',async(req,res)=>{
    const recipefound=await Recipe.find({materials: req.params.recipeID})

    res.send(recipefound);
});

You can send the client ID from front end in request params. Example: http:yourdomain:port/route/:recipeID

In backend you can handle like this:

router.get('/',async(req,res)=>{
    const recipefound=await Recipe.find({materials: req.params.recipeID})

    res.send(recipefound);
});

如何从客户那里获取ID？（Express and Mongoose）

來不及說愛妳 2025-02-11 02:08:29 浏览 1 评论 0 收藏 0

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≈。彩虹 2025-02-17 17:23:52

这条线

b = p;

有几个问题。首先，数组表达可能不是=运算符的目标。您不能在单个操作中分配整个数组，例如¹。

其次，类型不匹配； p具有类型int（*）[3]，而b具有类型int [3]。阵列不是指针-Array 表达式在大多数情况下对指针表达式的“衰减”，但是在这种情况下，即使指示器也将是不兼容的类型（b都会衰减到表达式类型int *，而不是int（ *）[3]）。

不，将一个数组的内容复制到另一个数组的唯一方法是使用库函数，例如memcpy或使用循环单独分配每个元素：

for ( size_t i = 0; i < 3; i++ )
  b[i] = (*p)[i]; // or b[i] = a[i]

就是这样。

^{初始化与分配不同。}

The line

b = p;

has a couple of problems. First of all, array expressions may not be the target of the = operator; you can't assign an entire array in a single operation like that¹.

Secondly, the types don't match; p has type int (*)[3], while b has type int [3]. Arrays are not pointers - array expressions "decay" to pointer expressions under most circumstances, but in this case even the pointers would be of incompatible types (b would decay to an expression of type int *, not int (*)[3]).

No, the only ways to copy the contents of one array to the other are to use library functions like memcpy or to use a loop to assign each element individually:

for ( size_t i = 0; i < 3; i++ )
  b[i] = (*p)[i]; // or b[i] = a[i]

That's it.

^{Initialization is different from assignment.}

如何将指针分配给数组，新数组？

∝单色的世界 2025-02-10 17:23:52 浏览 3 评论 0 收藏 0

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≈。彩虹 2025-02-17 13:51:32

您需要实施 asycnvalidator

如果您愿意，您也可以在同一验证器中包含验证器。

private validateEmail(email: string): Observable<ValidationErrors | null> {
    //required
    if (!email) return of({ required: true });

    //email regExpr
    const EMAIL_REGEXP =
      /^(?=.{1,254}$)(?=.{1,64}@)[a-zA-Z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-zA-Z0-9!#$%&'*+/=?^_`{|}~-]+)*@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/;

    if (!EMAIL_REGEXP.test(email)) return of({ email: true });

    return of(email).pipe(
      debounceTime(500),
      distinctUntilChanged(),
      delay(500),
      map((email) => {
        //check if exist
        return emailsYetGet.find((x) => x == email)
          ? {
              isTaken: 'Email exists already.',
            }
          : null;
      })
    );
  }

stackblitz

注意：请记住，请记住您的指示在模块的声明中，您使用它的组件在哪里，并检查您的api

note2：regexpr我得到了

You need implements AsycnValidator not Validator

If you want, you can also include in the same validator a validator.required and a validator.email

private validateEmail(email: string): Observable<ValidationErrors | null> {
    //required
    if (!email) return of({ required: true });

    //email regExpr
    const EMAIL_REGEXP =
      /^(?=.{1,254}$)(?=.{1,64}@)[a-zA-Z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-zA-Z0-9!#$%&'*+/=?^_`{|}~-]+)*@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/;

    if (!EMAIL_REGEXP.test(email)) return of({ email: true });

    return of(email).pipe(
      debounceTime(500),
      distinctUntilChanged(),
      delay(500),
      map((email) => {
        //check if exist
        return emailsYetGet.find((x) => x == email)
          ? {
              isTaken: 'Email exists already.',
            }
          : null;
      })
    );
  }

a stackblitz

NOTE: Remember include your directive in declarations of the modules where is the components in witch you use it and check you API

NOTE2: the REGEXPR I get it form the Angular's github about validators

如何使用异步呼叫使用验证器指令

平生欢 2025-02-10 13:51:32 浏览 4 评论 0 收藏 0

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≈。彩虹 2025-02-17 11:29:27

您已经对评论中的错误有一个答案，但是我将提出一种更简单的方法。

您可以直接在列表元素上迭代，这通常是建议的，并使代码更简单：

fruits = ["Apple", "Mango", "Guava", "Kiwi","Melon"]

for fruit in fruits:
    if fruit == "Guava" or fruit == "Mango":
        print(fruit)

You already have an answer about the error in the comments, but I'll propose a simpler approach.

You can iterate over the list elements directly, which is usually recommended and makes the code simpler:

fruits = ["Apple", "Mango", "Guava", "Kiwi","Melon"]

for fruit in fruits:
    if fruit == "Guava" or fruit == "Mango":
        print(fruit)

我是新手Python，并且在运行代码时，我会遇到一个错误：对象不是可呼叫的“。”有人可以帮我吗

九歌凝 2025-02-10 11:29:27 浏览 1 评论 0 收藏 0

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坚持写一个递归的锈蚀声明性宏观宏观

如何从客户那里获取ID？（Express and Mongoose）

如何将指针分配给数组，新数组？

如何使用异步呼叫使用验证器指令

我是新手Python，并且在运行代码时，我会遇到一个错误：对象不是可呼叫的“。”有人可以帮我吗

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