I'm having a "no-undef" issue in my ReactJs app, the console says:  

* Uncaught ReferenceError: equipment is not defined at Equipment line
18 and line 21.
* Uncaught ReferenceError: identifier is not defined at Object../src/reducers/equipment.js (equipment.js:5)

This is the code I've written: 

Component (..components/Equipment.js):

```
import React, { Component } from 'react';
import {connect} from 'react-redux';

class Equipment extends Component {
  render() {
    return (
      <div>
        {this.props.equipment.map(note => (
          <div className="card">
            <div className="card-header">
              Equipment
            </div>
            <div className="card-content">
              <table>
                <tbody>
                  <tr>
                    <td>{equipment.identifier}</td>
                  </tr>
                  <tr>
                    <td>{equipment.location}</td>
                  </tr>
                </tbody>
              </table>
              <button>edit</button><button>delete</button>
            </div>
          </div>
        ))}
      </div>
    )
  }
}

const mapStateToProps = state => {
  return {
    equipment: state.equipment,
  }
}

const mapDispatchToProps = dispatch => {
  return {
  }
}

export default connect(mapStateToProps, mapDispatchToProps)(Equipment);

```

Reducer (..reducers/equipment.js):

```
const initialState = [
  {
    equipment:  [
      identifier: "My Machine 1",
      location: "My Location 1"
    ]
  }
];

export default function equipment(state=initialState, action) {
  switch (action.type) {
    default:
      return state;
  }
}

```

Any idea of where's the error exactly?
Thank you.