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下限错误(Lower bound error)

 我在C ++中关注Lower_bound() 本教程。 我做了一个简单的代码，在向量中找到一个小于或等于向量中的数字的数字+我想要的任何数字。 我的代码是这样的  
cout << *lower_bound(A.begin(), A.end(), A[x] + 3);
 
 向量A[]的排序位置。 但是代码将它指向一个大于两个数字之和的数字。  
 例如，如果我的向量的值为0, 3, 5, 8, 12并且我希望它打印最小的数字小于或等于A[3] + 3 = 11它应该输出为8但它给出了输出12 。 有什么理由？ 
 
 这是我的代码：  
#include <bits/stdc++.h>
using namespace std;

int main() {
    vector<int> A = {0, 5, 3, 12, 8};

    sort(A.begin(), A.end());
    cout << "A[3] = " << A[3] << endl;
    cout << *lower_bound(A.begin(), A.end(), A[3] + 3) << endl;
    return 0;
}

I am following this tutorial on Lower_bound() in C++. I have made a simple code to find a number in a vector lesser than or equal to a number from the vector + any number that I want. My code goes like this 
cout << *lower_bound(A.begin(), A.end(), A[x] + 3);
 
where the vector A[] is sorted. But the code points it to a number greater than the sum of both the numbers. 
For example if my vector has values as 0, 3, 5, 8, 12 and I want it to print the nearest number lesser than or equal to A[3] + 3 = 11 it should give output as 8 but it gives the output of 12. Any reasons?
 
Here is my code: 
#include <bits/stdc++.h>
using namespace std;

int main() {
    vector<int> A = {0, 5, 3, 12, 8};

    sort(A.begin(), A.end());
    cout << "A[3] = " << A[3] << endl;
    cout << *lower_bound(A.begin(), A.end(), A[3] + 3) << endl;
    return 0;
}

原文：https://stackoverflow.com/questions/49935249

更新时间：2023-04-30 20:04

最满意答案

 我已经设法通过使用extract-text-webpack-plugin和style-ext-html-webpack-plugin的组合来解决我的难题。让我们假设一个文件夹结构如下：  
|- src
   |- index.ejs
   |- inline.css
   |- main.css
   |- main.js
 
 main.js包含以下内容：  
import _ from 'lodash';
import './inline.css';
import './main.css';

function component() {
    const element = document.createElement('div');
    element.innerHTML = _.join(['Hello', 'Webpack', '!!!'], ' ');
    return element;
}

document.body.appendChild(component());
 
 目的是让Webpack生成dist / index.html并直接在index.html的结果头中渲染inline.css。 进一步的main.css通过css-loader加载。  
 为此，我创建了webpack.config.js ，如下所示：  
const path = require('path');

const ExtractTextPlugin = require('extract-text-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const StyleExtHtmlPlugin = require('style-ext-html-webpack-plugin');

const extractSplashCSS = new ExtractTextPlugin('splash.css');
const extractMainCSS = new ExtractTextPlugin('main.css');

module.exports = {
    entry: {
        main: './src/main.js'
    },
    output: {
        path: path.join(process.cwd(), 'dist'),
        filename: '[name].bundle.js'
    },
    module: {
        rules: [
            {
                include: [
                    path.join(process.cwd(), 'src/inline.css')
                ],
                test: /\.css$/,
                loaders: extractSplashCSS.extract({
                    use: 'css-loader'
                })
            },
            {
                exclude: [
                    path.join(process.cwd(), 'src/inline.css')
                ],
                test: /\.css$/,
                loaders: extractMainCSS.extract({
                    use: 'css-loader'
                })
            }
        ]
    },
    plugins: [
        extractSplashCSS,
        extractMainCSS,
        new HtmlWebpackPlugin({
            title: 'Hello Webpack 2',
            template: 'src/index.ejs',
            filename: 'index.html'
        }),
        new StyleExtHtmlPlugin('splash.css')
    ]
};
 
 生成的index.html包含inline.css作为index.html头部的样式标记嵌入：  
<html>
<head>
<title>Hello Webpack 2</title>
<style>body {
    background-color: lightgrey;
}</style><link href="main.css" rel="stylesheet"></head>
<body>
<p>Webpack 2...</p>
<script type="text/javascript" src="main.bundle.js"></script></body>
</html>

I have managed to resolve my puzzle by using a combination of the extract-text-webpack-plugin and style-ext-html-webpack-plugin Let's assume a folder structure as follows: 
|- src
   |- index.ejs
   |- inline.css
   |- main.css
   |- main.js
 
main.js contains the following: 
import _ from 'lodash';
import './inline.css';
import './main.css';

function component() {
    const element = document.createElement('div');
    element.innerHTML = _.join(['Hello', 'Webpack', '!!!'], ' ');
    return element;
}

document.body.appendChild(component());
 
The aim is to have Webpack generate dist/index.html and render inline.css directly in the resulting head of index.html. Further main.css loads via the css-loader. 
To achieve this, I created webpack.config.js as follows: 
const path = require('path');

const ExtractTextPlugin = require('extract-text-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const StyleExtHtmlPlugin = require('style-ext-html-webpack-plugin');

const extractSplashCSS = new ExtractTextPlugin('splash.css');
const extractMainCSS = new ExtractTextPlugin('main.css');

module.exports = {
    entry: {
        main: './src/main.js'
    },
    output: {
        path: path.join(process.cwd(), 'dist'),
        filename: '[name].bundle.js'
    },
    module: {
        rules: [
            {
                include: [
                    path.join(process.cwd(), 'src/inline.css')
                ],
                test: /\.css$/,
                loaders: extractSplashCSS.extract({
                    use: 'css-loader'
                })
            },
            {
                exclude: [
                    path.join(process.cwd(), 'src/inline.css')
                ],
                test: /\.css$/,
                loaders: extractMainCSS.extract({
                    use: 'css-loader'
                })
            }
        ]
    },
    plugins: [
        extractSplashCSS,
        extractMainCSS,
        new HtmlWebpackPlugin({
            title: 'Hello Webpack 2',
            template: 'src/index.ejs',
            filename: 'index.html'
        }),
        new StyleExtHtmlPlugin('splash.css')
    ]
};
 
The resulting index.html contains inline.css embedded as a style tag in the head of index.html: 
<html>
<head>
<title>Hello Webpack 2</title>
<style>body {
    background-color: lightgrey;
}</style><link href="main.css" rel="stylesheet"></head>
<body>
<p>Webpack 2...</p>
<script type="text/javascript" src="main.bundle.js"></script></body>
</html>

下限错误(Lower bound error)

最满意答案

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