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

50 lines
1.4 KiB
JavaScript

import _curry3 from "./internal/_curry3.js";
import _has from "./internal/_has.js";
/**
* Creates a new object with the own properties of the two provided objects. If
* a key exists in both objects, the provided function is applied to the key
* and the values associated with the key in each object, with the result being
* used as the value associated with the key in the returned object.
*
* @func
* @memberOf R
* @since v0.19.0
* @category Object
* @sig ((String, a, a) -> a) -> {a} -> {a} -> {a}
* @param {Function} fn
* @param {Object} l
* @param {Object} r
* @return {Object}
* @see R.mergeDeepWithKey, R.merge, R.mergeWith
* @example
*
* let concatValues = (k, l, r) => k == 'values' ? R.concat(l, r) : r
* R.mergeWithKey(concatValues,
* { a: true, thing: 'foo', values: [10, 20] },
* { b: true, thing: 'bar', values: [15, 35] });
* //=> { a: true, b: true, thing: 'bar', values: [10, 20, 15, 35] }
* @symb R.mergeWithKey(f, { x: 1, y: 2 }, { y: 5, z: 3 }) = { x: 1, y: f('y', 2, 5), z: 3 }
*/
var mergeWithKey =
/*#__PURE__*/
_curry3(function mergeWithKey(fn, l, r) {
var result = {};
var k;
for (k in l) {
if (_has(k, l)) {
result[k] = _has(k, r) ? fn(k, l[k], r[k]) : l[k];
}
}
for (k in r) {
if (_has(k, r) && !_has(k, result)) {
result[k] = r[k];
}
}
return result;
});
export default mergeWithKey;