在学习了一些 CSS 和 flexbox 之后,我正在尝试构建一个 Landing 宣传册网站。在构建一个的过程中,我遇到了一个我无法独自解决的问题。我试图通过使Col
元素或Row
元素跨越来删除紫色虚线区域。尽管付出了努力,紫色虚线区域并没有消失。我应该添加一些 CSS 吗?我希望通过填充它来使其看起来有点居中对齐。由于多个依赖项,我无法使代码在代码片段上运行,但我希望屏幕截图有所帮助。
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.6.3/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.6.3/umd/react-dom.production.min.js"></script>
import React from "react";
import { IoIosFlash } from "react-icons/io";
import styled from "styled-components";
import studyImg from "../../../asset/casual-life-3d-reading.png";
const heroColor = ({ theme }) => theme.colors.blueberry;
const navyColor = ({ theme }) => theme.colors.navy;
const whiteColor = ({ theme }) => theme.colors.white;
const data = {
heroMessage: "Memorize and Learn like thunder",
CTAMessage:
"Lorem Ipsum is simply dummy text of the printing and …
Run Code Online (Sandbox Code Playgroud)const StyledNavLink = styled(NavLink)`
text-decoration: ${(props) => {
console.log(props.style);
return props.style ? (isActive) => (isActive ? "underline" : "none") : "none";
}};
&:hover {
text-decoration: underline;
}
`;
export default function BasicExample() {
return (
<Router>
<Navbar>
<NavItems>
<NavItem>
<NavLink
to="/"
end={true}
style={({ isActive }) => {
console.log(isActive + "About");
return { textDecoration: isActive ? "underline" : "none" };
}}
>
Home
</NavLink>
</NavItem>
<NavItem>
<NavLink
to="/about"
style={({ isActive }) => {
console.log(isActive + "About");
return { textDecoration: isActive ? …
Run Code Online (Sandbox Code Playgroud) 我遇到一个相当复杂的实体框架6错误"的实体对象不能被IEntityChangeTracker的多个实例引用",虽然它是很容易通过实现一个简单的解决方法来解决这个问题,关键是,原来的实现应该工作原样.这是相关课程的外观
public class Response
{
public int Id { get; set; }
public string QuestionId { get; set; }
//foreign key
public int UserId { get; set; }
public virtual User User { get; set; }
public bool IsDeleted { get; set; }
}
public class User
{
public int Id { get; set; }
public string UserName {get; set;}
public virtual List<Response> Responses { get; set; }
public bool IsDeleted { get; set; }
}
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并且,更新响应的相关代码如下
/* 1 */ …
Run Code Online (Sandbox Code Playgroud) 我正在访问从我的模拟 API 返回的承诺。React 组件如下所示
import React from 'react';
import StudentListStatistics from './StudentListStatistics';
import StudentStatisticsApi from '../../api/mockStudentApi';
class AboutPage extends React.Component {
constructor(props, context) {
super(props, context);
this.state = {
studentsStatistics: []
};
}
componentDidMount() {
StudentStatisticsApi.getAllStudentsStatistics().then(
studentsStatistics => {
this.setState({
studentsStatistics: studentsStatistics
});
debugger;
}
);
console.log(this.state.studentsStatistics);
}
render() {
return (
<div>
<h2>Student Body Statistics</h2>
<StudentListStatistics studentsStatistics={this.state.studentsStatistics}/>
</div>
);
}
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模拟 API 看起来像这样
class StudentApi {
static getAllStudentsStatistics() {
return new Promise((resolve, reject)=> {
setTimeout(()=> {
resolve(Object.assign([], studentsStatistics));
}, …
Run Code Online (Sandbox Code Playgroud) 我想对一个对象列表进行排序,结构是一个 Dictionary<Object, List<int>>
字典中的项目将是
item_1, (2,2,3)
item_2, (1,3,4)
item_3, (2,3,4)
item_4, (1,2)
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一旦项目被排序,它们应该显示为
item_4, 1,2
item_2, 1,3,4
item_1, 2,2,3
item_3, 2,3,4
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所以,基本上我必须对列表中的第一项进行排序,然后是第二项,然后是第三项,使用 linq 实现这种解决方案的简单方法是什么