/* eslint no-new-func: "off" */
export const subClassArray = ( function () {

  try {

    // try es6 subclassing
    return Function( 'name', 'baseClass', '_constructor', [
      'baseClass = baseClass || Array',
      'return {',
      '  [name]: class extends baseClass {',
      '    constructor (...args) {',
      '      super(...args)',
      '      _constructor && _constructor.apply(this, args)',
      '    }',
      '  }',
      '}[name]'
    ].join( '\n' ) )

  } catch ( e ) {

    // Use es5 approach
    return ( name, baseClass = Array, _constructor ) => {

      const Arr = function () {

        baseClass.apply( this, arguments )
        _constructor && _constructor.apply( this, arguments )

      }

      Arr.prototype = Object.create( baseClass.prototype )
      Arr.prototype.constructor = Arr

      Arr.prototype.map = function ( fn ) {

        const arr = new Arr()
        arr.push.apply( arr, Array.prototype.map.call( this, fn ) )
        return arr

      }

      return Arr

    }

  }

} )()