cibernox/ember-cpm

import { parseComputedPropertyMacro } from '../utils';

/**
  Converts the value in the given dependent key into a float.

  Note that it returns NaN when the dependent key contains `null`, `undefined` or an invalid string.

  Example

  ```javascript
  var item = Ember.Object.extend({
    castedString: asFloat('33.33'),
    castedInt: asFloat('1'),
    castedCP: asFloat(sum('castedString', 'castedInt'))
  }).create();

  item.get('castedString'); // 33.33
  item.get('castedInt');    // 1.0
  item.get('castedCP');     // 34.33
  ```

  @method asFloat
  @for macros
  @param value The value to cast. It can be a number, a numeric string or a property key.
  @return {Number} Returns casted float.
*/
export default parseComputedPropertyMacro(function (raw) {
  return 'boolean' === typeof raw ? (raw ? 1 : 0) : parseFloat(raw);
});