eris-keys/node_modules/ramda/src/isArrayLike.js

a JavaScript client library for eris-keys

var _curry1 = require('./internal/_curry1');
var _isArray = require('./internal/_isArray');
var _isString = require('./internal/_isString');


/**
 * Tests whether or not an object is similar to an array.
 *
 * @func
 * @memberOf R
 * @since v0.5.0
 * @category Type
 * @category List
 * @sig * -> Boolean
 * @param {*} x The object to test.
 * @return {Boolean} `true` if `x` has a numeric length property and extreme indices defined; `false` otherwise.
 * @deprecated since v0.23.0
 * @example
 *
 *      R.isArrayLike([]); //=> true
 *      R.isArrayLike(true); //=> false
 *      R.isArrayLike({}); //=> false
 *      R.isArrayLike({length: 10}); //=> false
 *      R.isArrayLike({0: 'zero', 9: 'nine', length: 10}); //=> true
 */
module.exports = _curry1(function isArrayLike(x) {
  if (_isArray(x)) { return true; }
  if (!x) { return false; }
  if (typeof x !== 'object') { return false; }
  if (_isString(x)) { return false; }
  if (x.nodeType === 1) { return !!x.length; }
  if (x.length === 0) { return true; }
  if (x.length > 0) {
    return x.hasOwnProperty(0) && x.hasOwnProperty(x.length - 1);
  }
  return false;
});