moltres-utils/dist/data/anyAtIndex.js

Utils for Moltres apps

"use strict";

require("core-js/modules/es6.object.define-property");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;

var _curry = _interopRequireDefault(require("../common/curry"));

var _defn = _interopRequireDefault(require("../common/defn"));

var _errorUnexpectedType = _interopRequireDefault(require("./errors/errorUnexpectedType"));

var _isArrayLike = _interopRequireDefault(require("../lang/isArrayLike"));

var _isPromise = _interopRequireDefault(require("../lang/isPromise"));

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

/**
 * Returns `true` if at least one of elements of the list match the predicate starting at the given index, `false` otherwise.
 *
 * Dispatches to the `anyAtIndex` method of the list argument, if present.
 *
 * Supports async predicates. If a predicate returns a Promise than the entire method will upgrade to async and return a Promise.
 *
 * @function
 * @since v0.0.3
 * @category data
 * @sig (a -> Boolean) -> [a] -> Boolean
 * @param {Function} fn The predicate function.
 * @param {Integer} index The index to start at.
 * @param {Array} list The array to consider.
 * @returns {Boolean} `true` if the predicate is satisfied by at least one element, `false`
 *         otherwise.
 * @example
 *
 * const lessThan0 = flip(lt)(0)
 * const lessThan2 = flip(lt)(2)
 * anyAtIndex(lessThan0, 0, [3, 2, 1]) //=> false
 * anyAtIndex(lessThan2, 1, [3, 2, 1]) //=> true
 *
 * await anyAtIndex(async (value) => lessThan2(value), 0, [1, 2]) //=> true
 */
var anyAtIndex = (0, _curry.default)((0, _defn.default)('anyAtIndex', function (fn, index, list) {
  if (!(0, _isArrayLike.default)(list)) {
    throw (0, _errorUnexpectedType.default)('ArrayLike', list);
  }

  var length = list.length;
  var idx = index || 0;

  if (idx < 0) {
    idx = length + idx;
  }

  if (idx < 0) {
    idx = 0;
  }

  while (idx < length) {
    var result = fn(list[idx], idx);

    if ((0, _isPromise.default)(result)) {
      return result.then(function (resolvedResult) {
        if (resolvedResult) {
          return true;
        }

        return anyAtIndex(fn, idx + 1, list);
      });
    } else if (result) {
      return true;
    }

    idx += 1;
  }

  return false;
}));
var _default = anyAtIndex;
exports.default = _default;
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