text: import React, { Component, PropTypes } from 'react'
  
  export default class Picker extends Component {
    render() {
      const { value, onChange, options } = this.props
  
      return (
        <span>
          <h1>{value}</h1>
          <select onChange={e => onChange(e.target.value)}
                  value={value}>
            {options.map(option =>
              <option value={option} key={option}>
                {option}
              </option>)
            }
          </select>
        </span>
      )
    }
  }
  
  Picker.propTypes = {
    options: PropTypes.arrayOf(
      PropTypes.string.isRequired
    ).isRequired,
    value: PropTypes.string.isRequired,
    onChange: PropTypes.func.isRequired
  }
  