vis-utils/lib/filterInRect.js

Utility functions for data visualization

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = filterInRect;

var _rectContains = require('./rectContains');

var _rectContains2 = _interopRequireDefault(_rectContains);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/**
 * Filters the elements in the passed in array to those that are contained within
 * the specified rectangle.
 *
 * @param {Array} array The input array to filter
 * @param {Number[][]} rect The rectangle, a pair of two points [[x, y], [x, y]]
 * @param {Function} x Function that maps a point in the array to its x value
 *   (defaults to d => d[0])
 * @param {Function} y Function that maps a point in the array to its y value
 *   (defaults to d => d[1])
 *
 * @return {Array} The subset of the input array that is contained within the
 *   rectangle
 */
function filterInRect(array, rect) {
  var x = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : function (d) {
    return d[0];
  };
  var y = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : function (d) {
    return d[1];
  };

  return array.filter(function (d) {
    return (0, _rectContains2.default)(rect, [x(d), y(d)]);
  });
}