Theresia Schroeder

Theresia Schroeder

1638962400

How to Student Management System in PHP - Part 43 Classes page

In this series, we create a student management system from scratch using PHP in object oriented format and model view controller system.

source code:
https://github.com/Eathorne2/PHP-Student-management

#php 

What is GEEK

Buddha Community

How to Student Management System in PHP - Part 43 Classes page

John Smith

1608784747

Student Result Management System in PHP

The Student Result Management system is developed in PHP Script and Mysql Database. The Student Result management system is helpful in generate students result and issue on the internet. This is a perfect student results management system using PHP with MYSQL database. This result management web application is created for schools and colleges. This Online Student Result Management System can be used in schools or collages for published their student result online. This is absolute Student Result Management System that is utilized for make results, managing classes, managing subject and put student result online. Under this system we have developed backend and front-end for students and admin users and in this system students can search result and they can download their result in pdf format also. Here you can find complete source code with online demo also.

https://www.webslesson.info/2020/12/online-student-result-management-system-in-php-with-mysql.html

#school result management system php #php projects with source code free #student result management system in php and mysql #student result management system project in php

Lawrence Lesch

Lawrence Lesch

1662107520

Superdom: Better and Simpler ES6 DOM Manipulation

Superdom

You have dom. It has all the DOM virtually within it. Use that power:

// Fetch all the page links
let links = dom.a.href;

// Links open in a new tab
dom.a.target = '_blank';

Only for modern browsers

Getting started

Simply use the CDN via unpkg.com:

<script src="https://unpkg.com/superdom@1"></script>

Or use npm or bower:

npm|bower install superdom --save

Select

It always returns an array with the matched elements. Get all the elements that match the selector:

// Simple element selector into an array
let allLinks = dom.a;

// Loop straight on the selection
dom.a.forEach(link => { ... });

// Combined selector
let importantLinks = dom['a.important'];

There are also some predetermined elements, such as id, class and attr:

// Select HTML Elements by id:
let main = dom.id.main;

// by class:
let buttons = dom.class.button;

// or by attribute:
let targeted = dom.attr.target;
let targeted = dom.attr['target="_blank"'];

Generate

Use it as a function or a tagged template literal to generate DOM fragments:

// Not a typo; tagged template literals
let link = dom`<a href="https://google.com/">Google</a>`;

// It is the same as
let link = dom('<a href="https://google.com/">Google</a>');

Delete elements

Delete a piece of the DOM

// Delete all of the elements with the class .google
delete dom.class.google;   // Is this an ad-block rule?

Attributes

You can easily manipulate attributes right from the dom node. There are some aliases that share the syntax of the attributes such as html and text (aliases for innerHTML and textContent). There are others that travel through the dom such as parent (alias for parentNode) and children. Finally, class behaves differently as explained below.

Get attributes

The fetching will always return an array with the element for each of the matched nodes (or undefined if not there):

// Retrieve all the urls from the page
let urls = dom.a.href;     // #attr-list
  // ['https://google.com', 'https://facebook.com/', ...]

// Get an array of the h2 contents (alias of innerHTML)
let h2s = dom.h2.html;     // #attr-alias
  // ['Level 2 header', 'Another level 2 header', ...]

// Get whether any of the attributes has the value "_blank"
let hasBlank = dom.class.cta.target._blank;    // #attr-value
  // true/false

You also use these:

  • html (alias of innerHTML): retrieve a list of the htmls
  • text (alias of textContent): retrieve a list of the htmls
  • parent (alias of parentNode): travel up one level
  • children: travel down one level

Set attributes

// Set target="_blank" to all links
dom.a.target = '_blank';     // #attr-set

dom.class.tableofcontents.html = `
  <ul class="tableofcontents">
    ${dom.h2.map(h2 => `
      <li>
        <a href="#${h2.id}">
          ${h2.innerHTML}
        </a>
      </li>
    `).join('')}
  </ul>
`;

Remove an attribute

To delete an attribute use the delete keyword:

// Remove all urls from the page
delete dom.a.href;

// Remove all ids
delete dom.a.id;

Classes

It provides an easy way to manipulate the classes.

Get classes

To retrieve whether a particular class is present or not:

// Get an array with true/false for a single class
let isTest = dom.a.class.test;     // #class-one

For a general method to retrieve all classes you can do:

// Get a list of the classes of each matched element
let arrays = dom.a.class;     // #class-arrays
  // [['important'], ['button', 'cta'], ...]

// If you want a plain list with all of the classes:
let flatten = dom.a.class._flat;     // #class-flat
  // ['important', 'button', 'cta', ...]

// And if you just want an string with space-separated classes:
let text = dom.a.class._text;     // #class-text
  // 'important button cta ...'

Add a class

// Add the class 'test' (different ways)
dom.a.class.test = true;    // #class-make-true
dom.a.class = 'test';       // #class-push

Remove a class

// Remove the class 'test'
dom.a.class.test = false;    // #class-make-false

Manipulate

Did we say it returns a simple array?

dom.a.forEach(link => link.innerHTML = 'I am a link');

But what an interesting array it is; indeed we are also proxy'ing it so you can manipulate its sub-elements straight from the selector:

// Replace all of the link's html with 'I am a link'
dom.a.html = 'I am a link';

Of course we might want to manipulate them dynamically depending on the current value. Just pass it a function:

// Append ' ^_^' to all of the links in the page
dom.a.html = html => html + ' ^_^';

// Same as this:
dom.a.forEach(link => link.innerHTML = link.innerHTML + ' ^_^');

Note: this won't work dom.a.html += ' ^_^'; for more than 1 match (for reasons)

Or get into genetics to manipulate the attributes:

dom.a.attr.target = '_blank';

// Only to external sites:
let isOwnPage = el => /^https?\:\/\/mypage\.com/.test(el.getAttribute('href'));
dom.a.attr.target = (prev, i, element) => isOwnPage(element) ? '' : '_blank';

Events

You can also handle and trigger events:

// Handle click events for all <a>
dom.a.on.click = e => ...;

// Trigger click event for all <a>
dom.a.trigger.click;

Testing

We are using Jest as a Grunt task for testing. Install Jest and run in the terminal:

grunt watch

Download Details:

Author: franciscop
Source Code: https://github.com/franciscop/superdom 
License: MIT license

#javascript #es6 #dom 

Origin Scale

Origin Scale

1616572311

Originscale Order Management System

Originscale order management software helps to manage all your orders across channels in a single place. Originscale collects orders across multiple channels in real-time - online, offline, D2C, B2B, and more. View all your orders in one single window and process them with a simple click.

#order management system #ordering management system #order management software #free order management software #purchase order management software #best order management software

Alexander Karachunov

Alexander Karachunov

1640011680

Как создать динамическую таблицу в React

В этой статье я постараюсь научить создавать динамическую таблицу в React. Да, я знаю, что это довольно просто, но этот урок предназначен для новичков, и новичок должен знать, как это сделать. Вы имеете в виду, что, скажем, вы хотите создать таблицу 3 × 4? Я не совсем уверен, но вы можете хранить номера строк и столбцов в переменной и на основе этого создавать таблицу. , как добавить поиск и сортировку в таблицу

import React, { Component } from 'react'

class Table extends Component {
   constructor(props) {
      super(props) //since we are extending class Table so we have to use super in order to override Component class constructor
      this.state = { //state is by default an object
         students: [
            { id: 1, name: 'Wasif', age: 21, email: 'wasif@email.com' },
            { id: 2, name: 'Ali', age: 19, email: 'ali@email.com' },
            { id: 3, name: 'Saad', age: 16, email: 'saad@email.com' },
            { id: 4, name: 'Asad', age: 25, email: 'asad@email.com' }
         ]
      }
   }

   render() { //Whenever our class runs, render method will be called automatically, it may have already defined in the constructor behind the scene.
      return (
         <div>
            <h1>React Dynamic Table</h1>
         </div>
      )
   }
}

export default Table //exporting a component make it reusable and this is the beauty of react

 

renderTableData() {
      return this.state.students.map((student, index) => {
         const { id, name, age, email } = student //destructuring
         return (
            <tr key={id}>
               <td>{id}</td>
               <td>{name}</td>
               <td>{age}</td>
               <td>{email}</td>
            </tr>
         )
      })
   }

   render() {
      return (
         <div>
            <h1 id='title'>React Dynamic Table</h1>
            <table id='students'>
               <tbody>
                  {this.renderTableData()}
               </tbody>
            </table>
         </div>
      )
   }

 

renderTableHeader() {
      let header = Object.keys(this.state.students[0])
      return header.map((key, index) => {
         return <th key={index}>{key.toUpperCase()}</th>
      })
   }

   render() {
      return (
         <div>
            <h1 id='title'>React Dynamic Table</h1>
            <table id='students'>
               <tbody>
                  <tr>{this.renderTableHeader()}</tr>
                  {this.renderTableData()}
               </tbody>
            </table>
         </div>
      )
   }
#title {
   text - align: center;
   font - family: arial, sans - serif;
}

#students {
   text - align: center;
   font - family: "Trebuchet MS", Arial, Helvetica, sans - serif;
   border - collapse: collapse;
   border: 3 px solid #ddd;
   width: 100 % ;
}

#students td, #students th {
   border: 1 px solid #ddd;
   padding: 8 px;
}

#students tr: nth - child(even) {
   background - color: #f2f2f2;
}

#students tr: hover {
   background - color: #ddd;
}

#students th {
   padding - top: 12 px;
   padding - bottom: 12 px;
   text - align: center;
   background - color: #4CAF50;
  color: white;
}
if (errors.length) {
   alert("gikhare sag");
   setFormaState({
      ...formState,
      errors
   });
   return;
}
userService.addUser(formState.user);
setFormaState({
   errors: [],
   users: userService.getUsers()
});
return errors;
CODE VN

CODE VN

1639981967

Cách tạo bảng động trong React

Trong bài viết này, tôi sẽ cố gắng hướng dẫn cách tạo một bảng động trong react. Tôi biết nó khá đơn giản, nhưng hướng dẫn này dành cho người mới bắt đầu và người mới bắt đầu nên biết cách thực hiện loại công việc này., Ý bạn là giả sử bạn muốn tạo bảng 3 × 4? Tôi không thực sự chắc chắn nhưng bạn có thể lưu trữ số hàng và số cột thành biến và dựa vào đó tạo bảng. , cách thêm tìm kiếm và sắp xếp trong bảng

import React, { Component } from 'react'

class Table extends Component {
   constructor(props) {
      super(props) //since we are extending class Table so we have to use super in order to override Component class constructor
      this.state = { //state is by default an object
         students: [
            { id: 1, name: 'Wasif', age: 21, email: 'wasif@email.com' },
            { id: 2, name: 'Ali', age: 19, email: 'ali@email.com' },
            { id: 3, name: 'Saad', age: 16, email: 'saad@email.com' },
            { id: 4, name: 'Asad', age: 25, email: 'asad@email.com' }
         ]
      }
   }

   render() { //Whenever our class runs, render method will be called automatically, it may have already defined in the constructor behind the scene.
      return (
         <div>
            <h1>React Dynamic Table</h1>
         </div>
      )
   }
}

export default Table //exporting a component make it reusable and this is the beauty of react

 

renderTableData() {
      return this.state.students.map((student, index) => {
         const { id, name, age, email } = student //destructuring
         return (
            <tr key={id}>
               <td>{id}</td>
               <td>{name}</td>
               <td>{age}</td>
               <td>{email}</td>
            </tr>
         )
      })
   }

   render() {
      return (
         <div>
            <h1 id='title'>React Dynamic Table</h1>
            <table id='students'>
               <tbody>
                  {this.renderTableData()}
               </tbody>
            </table>
         </div>
      )
   }

 

renderTableHeader() {
      let header = Object.keys(this.state.students[0])
      return header.map((key, index) => {
         return <th key={index}>{key.toUpperCase()}</th>
      })
   }

   render() {
      return (
         <div>
            <h1 id='title'>React Dynamic Table</h1>
            <table id='students'>
               <tbody>
                  <tr>{this.renderTableHeader()}</tr>
                  {this.renderTableData()}
               </tbody>
            </table>
         </div>
      )
   }
#title {
   text - align: center;
   font - family: arial, sans - serif;
}

#students {
   text - align: center;
   font - family: "Trebuchet MS", Arial, Helvetica, sans - serif;
   border - collapse: collapse;
   border: 3 px solid #ddd;
   width: 100 % ;
}

#students td, #students th {
   border: 1 px solid #ddd;
   padding: 8 px;
}

#students tr: nth - child(even) {
   background - color: #f2f2f2;
}

#students tr: hover {
   background - color: #ddd;
}

#students th {
   padding - top: 12 px;
   padding - bottom: 12 px;
   text - align: center;
   background - color: #4CAF50;
  color: white;
}
if (errors.length) {
   alert("gikhare sag");
   setFormaState({
      ...formState,
      errors
   });
   return;
}
userService.addUser(formState.user);
setFormaState({
   errors: [],
   users: userService.getUsers()
});
return errors;