小编use*_*964的帖子

我的任务是在单击提交按钮时显示 flash 消息（“成功创建”）。[单击提交按钮，数据将存储在服务器中]我已经运行了这个命令 npm i react-flash-message。

<form onSubmit={this.handleSubmit}>
   <input type="submit" value="Submit" />
 </form>

处理提交函数：

  handleSubmit(event) {
     fetch('url', {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json'
            },
            body: JSON.stringify({
                name: this.state.name,
                description: this.state.description
            })
        }).then(res => {
            return res.json()
        })
            .then(data => console.log(data))
            .then(() => {
                window.location.reload(false)
                /* return (
                     <div>
                        <FlashMessage duration={5000}>
                            <strong>I will disapper in 5 seconds!</strong>
                       </FlashMessage>
                   </div>
                 ) */
            })
            /* window.flash('record has been created successfully!', 'success') */

            .catch(error => console.log('ERROR from create component'))
      }
     }

我已经评论了我试图显示 Flash …

我有一个数据集。它的一列 - “关键字” - 包含分类数据。我尝试使用的机器学习算法仅采用数字数据。我想将“关键字”列转换为数值 - 我该怎么做？使用自然语言处理？一袋话？

我尝试了以下但我得到了ValueError: Expected 2D array, got 1D array instead.

from sklearn.feature_extraction.text import CountVectorizer
count_vector = CountVectorizer()
dataset['Keyword'] = count_vector.fit_transform(dataset['Keyword'])
from sklearn.model_selection import train_test_split
y=dataset['C']
x=dataset(['Keyword','A','B'])
x_train,x_test,y_train,y_test=train_test_split(x,y,test_size=0.2,random_state=0)
from sklearn.linear_model import LinearRegression
regressor=LinearRegression()
regressor.fit(x_train,y_train)

我是本机反应的新手。我想创建导航栏/可折叠下拉菜单，其中应包含主页、博客、注册、登录按钮/链接。单击该按钮时，它应该导航到相应的页面。

应用程序.js

 import React from 'react';
 import { Blogs } from './app/views/Blogs.js';
 import {Signup } from './app/views/Signup.js;
 import {Login } from './app/views/Login.js;
 import { createAppContainer } from 'react-navigation';
 import { createStackNavigator } from 'react-navigation-stack';
 import { Home } from './app/views/Home.js';

 const AppNavigator = createStackNavigator(
 {
BlogsRT: {
  screen: Blogs
},
HomeRT: {
  screen: Home
},
SignupRT:{
screen: Signup
} ,
LoginRT:{
screen: Login
},
},
{
initialRouteName: 'HomeRT'
}
);

const MyRoutes = createAppContainer(AppNavigator);
 export default class App extends React.Component …