forked from waja/action-debian-package
46 lines
1.2 KiB
JavaScript
46 lines
1.2 KiB
JavaScript
import _curry2 from "./internal/_curry2.js";
|
|
import _dispatchable from "./internal/_dispatchable.js";
|
|
import _xfind from "./internal/_xfind.js";
|
|
/**
|
|
* Returns the first element of the list which matches the predicate, or
|
|
* `undefined` if no element matches.
|
|
*
|
|
* Dispatches to the `find` method of the second argument, if present.
|
|
*
|
|
* Acts as a transducer if a transformer is given in list position.
|
|
*
|
|
* @func
|
|
* @memberOf R
|
|
* @since v0.1.0
|
|
* @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}, {a: 2}, {a: 3}];
|
|
* R.find(R.propEq('a', 2))(xs); //=> {a: 2}
|
|
* R.find(R.propEq('a', 4))(xs); //=> undefined
|
|
*/
|
|
|
|
var find =
|
|
/*#__PURE__*/
|
|
_curry2(
|
|
/*#__PURE__*/
|
|
_dispatchable(['find'], _xfind, function find(fn, list) {
|
|
var idx = 0;
|
|
var len = list.length;
|
|
|
|
while (idx < len) {
|
|
if (fn(list[idx])) {
|
|
return list[idx];
|
|
}
|
|
|
|
idx += 1;
|
|
}
|
|
}));
|
|
|
|
export default find; |