How to populate a List based on a Table and its rows in Dart?

dart, html, html-table, list

Solution

Here the HTML:

<!DOCTYPE html>

<html>
  <head>
    <meta charset="utf-8">
    <title>Scratchweb</title>
    <link rel="stylesheet" href="scratchweb.css">
  </head>
  <body>
    <table id="employeeTable">
      <tr>
        <th>Name</th>
        <th>Departament</th>
        <th>Salary</th>
      </tr>
      <tr>
        <td>John</td>
        <td>1</td>
        <td>1500</td>
      </tr>
      <tr>
        <td>Mary</td>
        <td>2</td>
        <td>2500</td>
      </tr>    
    </table>

    <script type="application/dart" src="web/scratchweb.dart"></script>
    <script src="https://dart.googlecode.com/svn/branches/bleeding_edge/dart/client/dart.js"></script>
  </body>
</html>

Here's the Dart:

import 'dart:html';
import 'dart:math';

class Employee {
  String name;
  String department;
  num salary;

  Employee({this.name, this.department, this.salary});
  String toString() => '<employee name="$name" department="$department" salary="$salary">';
}

void main() {
  var employees = new List<Employee>();
  var table = query("table#employeeTable");
  for (TableRowElement row in table.rows) {
    if (row.cells.length != 3) {
      print("Malformed row: $row");
      continue;
    }
    if ((row.cells[0] as TableCellElement).tagName == "TH") {
      print("Skipping header");
      continue;
    }
    var cells = row.cells;
    var employee = new Employee(
        name: cells[0].text,
        department: cells[1].text,
        salary: parseDouble(cells[2].text));
    employees.add(employee);
  }
  print(employees);
}

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Problem

I want to populate a list of Objects based on a HTML Table. Let's say I have the following class: ``` class Employee { String name; String department; num salary; ...methods } ``` And in my HTML, I have the following table: ``` <table class="table" id="employeeTable"> <thead> <tr> <th>Name <th>Departament <th>Salary <tbody id="employeeTableBody"> <tr> <td> John <td> 1 <td> 1500 <tr> <td> Mary <td> 2 <td> 2500 ...etc </table> ``` So, how do I query the table, get its rows, then get its cells to fill my List of Employees (in this case)? I tried to use something like: ``` TableElement table = query("#employeesTable"); Element tableBody = query("#employeesTableBody"); ``` But I couldn't find a proper method in TableElement or Element to return TableRowElement, or maybe the cells of it. I tried to get the children nodes also, but without sucess. A pseudo-algorithm to fulfil this task would be something like this: ``` 1. Get the table 2. For each row of the table 2.a Create a new Employee object based on the value of each cell of the row. 2.b Append this object to the Employee List. 3. End ```

Original source