@reactual/handsontable/commonjs/multiMap.js

Spreadsheet-like data grid editor

'use strict';

exports.__esModule = true;

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

function MultiMap() {
  var map = {
    arrayMap: [],
    weakMap: new WeakMap()
  };

  return {
    get: function get(key) {
      if (canBeAnArrayMapKey(key)) {
        return map.arrayMap[key];
      } else if (canBeAWeakMapKey(key)) {
        return map.weakMap.get(key);
      }
    },
    set: function set(key, value) {
      if (canBeAnArrayMapKey(key)) {
        map.arrayMap[key] = value;
      } else if (canBeAWeakMapKey(key)) {
        map.weakMap.set(key, value);
      } else {
        throw new Error('Invalid key type');
      }
    },
    delete: function _delete(key) {
      if (canBeAnArrayMapKey(key)) {
        delete map.arrayMap[key];
      } else if (canBeAWeakMapKey(key)) {
        map.weakMap.delete(key);
      }
    }
  };

  function canBeAnArrayMapKey(obj) {
    return obj !== null && !isNaNSymbol(obj) && (typeof obj == 'string' || typeof obj == 'number');
  }

  function canBeAWeakMapKey(obj) {
    return obj !== null && ((typeof obj === 'undefined' ? 'undefined' : _typeof(obj)) == 'object' || typeof obj == 'function');
  }

  function isNaNSymbol(obj) {
    /* eslint-disable no-self-compare */
    return obj !== obj; // NaN === NaN is always false
  }
}

exports.default = MultiMap;