code: function options(options = [], value, placeholder) {
    if (placeholder) {
      options.unshift({ label: placeholder });
    }
  
    return options
      // normalize options
      .map(item => {
        return typeof item === 'object' ? item : { value: item, label: item };
      })
      // generate elements
      .map(item => {
        return (
          <option selected={item.value === value} value={item.value}>
            {item.label}
          </option>
        );
      });
  }
docs: Generates an array of `<option>` elements given the input `options`
  and selected `value`.
  
  The `options` can be a flat array of strings: (in this case, the label
  and value will be identical)
  
  [ 'a', 'b', 'c' ]
  
  It can also be an array of objects that have an `label` and `value`
  property:
  
  [
  { label: 'a', value: 1 },
  { label: 'b', value: 2 },
  { label: 'c', value: 3 }
  ]
  
  When given, the `placeholder` creates an extra option at the beginning
  of the list.
  
  [
  { label: 'placeholder' },
  { label: 'a', value: 1 },
  { label: 'b', value: 2 },
  { label: 'c', value: 3 },
  ]
  
  @param {Array} options         List of options.
  @param {*} [value]             The value to consider selected.
  @param {String} [placeholder]  The label for the dummy first option
  @return {Array}