Answer 1

您的json

const json = {
  "Albums": {
    "Krezip": [
      {
        "artist":"Krezip",
        "title":"Days like this",
      }
     ]
  }
}

内部循环

const albums = json.Albums // this is an array of albums

for(let key of Object.keys(albums)){
    const album = albums[key]
    // If this is an array then you might need to loop through them
    console.log(album[0])
}

Answer 2

问题是在问题标题中，您正在尝试在render_products方法中显示{product.trating}。它不是一个数字，而是{速率，计数}作为密钥的对象。请参考以下代码。

import React, { useState, useEffect } from "react";
import axios from "axios";

const idealoBackendUrl = "https://fakestoreapi.com/products"


function App() {


const render_products = (Products) => {
   
    return <div className='category-section fixed'>
        <h2 className="text-3xl font-extrabold tracking-tight text-gray-600 category-title">Products</h2>

        <div className="m-6 p-3 mt-10 ml-0 grid grid-cols-1 gap-y-10 gap-x-6 sm:grid-cols-2 lg:grid-cols-6 xl:gap-x-10" style={{ maxHeight: '800px', overflowY: 'scroll' }}>
            {/* Loop Products */}
            {Products.map(product => (
                <div className="group relative shadow-lg" >
                    <div className=" min-h-80 bg-gray-200 aspect-w-1 aspect-h-1 rounded-md overflow-hidden group-hover:opacity-75 lg:h-60 lg:aspect-none">
                        <img
                            alt="Product Image"
                            src=""
                            className="w-full h-full object-center object-cover lg:w-full lg:h-full"
                        />
                    </div>
                    <div className="flex justify-between p-3">
                        <div>
                            <h3 className="text-sm text-gray-700">
                                <a href={product.href}>
                                    <span aria-hidden="true" className="absolute inset-0" />
                                    <span style={{ fontSize: '16px', fontWeight: '600' }}>{product.item_name}</span>
                                </a>
                                <p>Tag -</p>
                            </h3>
                            {/* Here was the issue */}
                            <p className="mt-1 text-sm text-gray-500">Rating: {product.rating.rate}</p>
                        </div>
                        <p className="text-sm font-medium text-green-600">${product.current_price}</p>
                    </div>
                </div>
            ))}
        </div>
    </div>
}

const [itemData, setItemData] = useState(null);
const [error, setError] = React.useState(null);

useEffect(() => {
    getItemDataWithAxios().then(r => console.log(r));
}, []);

const getItemDataWithAxios = async () => {
    const response = await axios.get(idealoBackendUrl);
    console.log('print response data')
    console.log(response.data);
    setItemData(response.data);
};

if (error) return `Error: ${error.message}`;
if (!itemData) return <center style={{ marginTop: '200px' }}> <img src="https://icons8.com/preloaders/preloaders/1474/Walk.gif" style={{ width: '70px' }} /> </center>;


return (
      
          <div className="flex fixed flex-row">
              <div className="h-screen  bg-slate-800 p-3 xl:basis-1/5" style={{ minWidth: '65%' }}>
                  <img className="w-full" src="" alt="Sunset in the mountains" />
                  <div className="px-6 py-4">
                      <h1 className="text-3xl mb-2 font-bold text-white"> Idealo product catalog </h1>
                      <p className="text-gray-700 text-white">
                          by - <b style={{ color: 'orange' }}>Sithija</b>
                      </p>
                  </div>
              </div>
              <div className="ml-5  p-10 xl:basis-4/5">
                  {render_products(itemData)}
              </div>
          </div>
      // </>
   
  );
}

export default App;

随意编辑代码以包含您的徽标组件和其他图标，我将其删除，因为我没有这些项目的副本。

Answer 3

一个选项是首先汇总数据以计算 Yellowcards 和 GAMES by leagueCountry 的数量。之后，您可以将长时间转换为长时间，从而可以轻松地通过 ggplot2 绘制。

使用一些虚假的随机示例数据模仿您的真实数据：

set.seed(123)

new_soccer_referee <- data.frame(
  player = sample(letters, 20),
  leagueCountry = sample(c("Spain", "France", "England", "Italy"), 20, replace = TRUE),
  yellowCards = sample(1:5, 20, replace = TRUE),
  games = sample(1:20, 20, replace = TRUE)
)

library(dplyr)
library(tidyr)
library(ggplot2)

new_soccer_referee_long <- new_soccer_referee %>% 
  group_by(leagueCountry) %>%
  summarise(across(c(yellowCards, games), sum)) %>%
  pivot_longer(-leagueCountry, names_to = "variable", values_to = "number")

ggplot(new_soccer_referee_long, aes(leagueCountry, number, fill = variable)) +
  geom_col(position = "dodge")

Answer 4

将此依赖性添加到pom.xml

org.hibernate Hibernate-entityManager 5.2.3.final

Answer 5

这在很大程度上取决于 speed 在 data 类中的类是具有某些代码执行或仅是正常字段的属性。

没有太大的区别：

public float speed = 2f;

对绩效有影响：

public float speed {
    get {
         return ExpensiveFunction();
    }
}

Answer 6

这是一个仅在原始lapply中进行的示例，正​​如我在评论中提到的那样

library(dplyr)
library(readr)

lapply(list_of_files, \(f) {
  read_csv(f, col_names=TRUE) %>% 
    rename_with(~c("A", "B", "C", "D")) %>%  
    mutate(newcol1 = paste0(A,B),newcol2 = paste0(C,D))
})

Answer 7

您应该看一下sectionList的外推道。当数据更新时，Extradata更新列表

Answer 8

只需将您的帖子ID纳入路径：

use Symfony\Component\HttpFoundation\File\UploadedFile;
use Entity\Post;

class ArticleAdminController extends BaseController
{
    public function temporaryUploadAction(Request $request, Post $post, string $projectDir)
    {
        /** @var UploadedFile $uploadedFile */
        $uploadedFile = $request->files->get('image');
        $uploadedFile->move("{$projectDir}/private/{$post->getId()}");
    }
}

Answer 9

要仅在特定分支上提出拉请请求时运行阶段，您可以在舞台上设置条件。

condition: and(eq(variables['System.PullRequest.TargetBranch'], 'refs/heads/branchname'), eq(variables['Build.Reason'], 'PullRequest'))

以下是一个示例：

stages:
- stage: A
  condition: and(eq(variables['System.PullRequest.TargetBranch'], 'refs/heads/branchname'), eq(variables['Build.Reason'], 'PullRequest'))
  jobs:
  - job: A1
    steps:
      - script: xx

您可以使用预定义的变量： system.pullrequest.targetBranch 和 build.Reason 来过滤触发方法并拉请求目标分支。

有关更多详细信息，您可以参考文档：条件和预定义变量。

Answer 10

我设法找到了解决方案。这是浏览器，我猜是对https：// 2f81239fe704/（是docker容器hostname）和我的任何nginx.conf更改的第一个不正确的重定向响应。清洁cookie和网站数据后，更改为nginx.conf实际上会产生效果。最后，我最终得到了：

server_name localhost;
        
if ($scheme = http) {
    return 301 https://localhost:8021$request_uri;
}

Answer 11

要在Keras中创建自定义内核初始化，请尝试以下类似：

import numpy as np
import tensorflow as tf
import keras
from keras.models import Sequential
from keras.layers import Dense
from sklearn.datasets import load_breast_cancer

X,y = load_breast_cancer(return_X_y =True)

from sklearn.model_selection import train_test_split
X_train,X_test,y_train,y_test = train_test_split(X,y,test_size=0.3,random_state=1)


def my_custom_initialization(shape, dtype=None):
    return tf.random.normal(shape, dtype=dtype)

model = Sequential()
model.add(Dense(units=30,input_dim=X_train.shape[1],activation='relu',
                kernel_initializer=my_custom_initialization))
model.add(Dense(units=20,activation='relu',
                kernel_initializer=my_custom_initialization))
model.add(Dense(units=1,activation='sigmoid',
                kernel_initializer=my_custom_initialization))

model.compile(optimizer='sgd',loss='binary_crossentropy',metrics=['accuracy'])
model.fit(X_train,y_train,validation_data=(X_test,y_test),epochs=3,batch_size=40,verbose=1)

输出：

Epoch 1/3
10/10 [==============================] - 2s 65ms/step - loss: 598388.8750 - accuracy: 0.5553 - val_loss: 0.6913 - val_accuracy: 0.6316
Epoch 2/3
10/10 [==============================] - 0s 9ms/step - loss: 0.6907 - accuracy: 0.6256 - val_loss: 0.6898 - val_accuracy: 0.6316
Epoch 3/3
10/10 [==============================] - 0s 8ms/step - loss: 0.6893 - accuracy: 0.6256 - val_loss: 0.6883 - val_accuracy: 0.6316

Answer 12

以下可以完成这项工作

arr.reshape((-1, n))[:, :m] = 100

Answer 13

假设您的项目被构建为-A.Jar
而且该a.jar取决于另一个库-B.Jar

两个罐子都取决于log4j.jar的记录目的。

在这种情况下，您将将log4j作为运行时依赖关系添加到B.Jar的POM中，以便无需任何问题就可以编译。
当通过其POM建立a.jar时，将包括log4j和b.jar。

这也将有助于避免运行时方法冲突。

Answer 14

经过一番研究，我在必须具有EIP55校验和。但是，由于API提供了检查和创建这些功能的功能，因此我认为我尝试了一下，并且可以使用！

因此，在功能开始时添加了一条线之后：

to_public=web3.toChecksumAddress(to_public)

它可以使用。

Answer 15

您可以将字符串连接起来：

let str = 'prefix';
str = str + ' ';
// str === 'prefix '

或者，如果要将任何大小的字符串粘贴到指定的长度：

let str = 'prefix';
str = str.padEnd(7, " ");
// str === 'prefix '