12345678910111213141516171819202122232425262728293031323334353637383940414243444546 |
- import _curry2 from "./internal/_curry2.js";
- import _dispatchable from "./internal/_dispatchable.js";
- import _xfindIndex from "./internal/_xfindIndex.js";
- /**
- * Returns the index of the first element of the list which matches the
- * predicate, or `-1` 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] -> Number
- * @param {Function} fn The predicate function used to determine if the element is the
- * desired one.
- * @param {Array} list The array to consider.
- * @return {Number} The index of the element found, or `-1`.
- * @see R.transduce, R.indexOf
- * @example
- *
- * const xs = [{a: 1}, {a: 2}, {a: 3}];
- * R.findIndex(R.propEq('a', 2))(xs); //=> 1
- * R.findIndex(R.propEq('a', 4))(xs); //=> -1
- */
- var findIndex =
- /*#__PURE__*/
- _curry2(
- /*#__PURE__*/
- _dispatchable([], _xfindIndex, function findIndex(fn, list) {
- var idx = 0;
- var len = list.length;
- while (idx < len) {
- if (fn(list[idx])) {
- return idx;
- }
- idx += 1;
- }
- return -1;
- }));
- export default findIndex;
|