test-action-debian-package/node_modules/ramda/es/findLast.js
Dawid Dziurla 9308795b8b
update
2020-03-26 15:37:35 +01:00

43 lines
1.1 KiB
JavaScript

import _curry2 from "./internal/_curry2.js";
import _dispatchable from "./internal/_dispatchable.js";
import _xfindLast from "./internal/_xfindLast.js";
/**
* Returns the last element of the list which matches the predicate, or
* `undefined` if no element matches.
*
* Acts as a transducer if a transformer is given in list position.
*
* @func
* @memberOf R
* @since v0.1.1
* @category List
* @sig (a -> Boolean) -> [a] -> a | undefined
* @param {Function} fn The predicate function used to determine if the element is the
* desired one.
* @param {Array} list The array to consider.
* @return {Object} The element found, or `undefined`.
* @see R.transduce
* @example
*
* const xs = [{a: 1, b: 0}, {a:1, b: 1}];
* R.findLast(R.propEq('a', 1))(xs); //=> {a: 1, b: 1}
* R.findLast(R.propEq('a', 4))(xs); //=> undefined
*/
var findLast =
/*#__PURE__*/
_curry2(
/*#__PURE__*/
_dispatchable([], _xfindLast, function findLast(fn, list) {
var idx = list.length - 1;
while (idx >= 0) {
if (fn(list[idx])) {
return list[idx];
}
idx -= 1;
}
}));
export default findLast;