1 | import _curry1 from "./internal/_curry1.js";
|
---|
2 | import assocPath from "./assocPath.js";
|
---|
3 | import lens from "./lens.js";
|
---|
4 | import path from "./path.js";
|
---|
5 | /**
|
---|
6 | * Returns a lens whose focus is the specified path.
|
---|
7 | *
|
---|
8 | * @func
|
---|
9 | * @memberOf R
|
---|
10 | * @since v0.19.0
|
---|
11 | * @category Object
|
---|
12 | * @typedefn Idx = String | Int | Symbol
|
---|
13 | * @typedefn Lens s a = Functor f => (a -> f a) -> s -> f s
|
---|
14 | * @sig [Idx] -> Lens s a
|
---|
15 | * @param {Array} path The path to use.
|
---|
16 | * @return {Lens}
|
---|
17 | * @see R.view, R.set, R.over
|
---|
18 | * @example
|
---|
19 | *
|
---|
20 | * const xHeadYLens = R.lensPath(['x', 0, 'y']);
|
---|
21 | *
|
---|
22 | * R.view(xHeadYLens, {x: [{y: 2, z: 3}, {y: 4, z: 5}]});
|
---|
23 | * //=> 2
|
---|
24 | * R.set(xHeadYLens, 1, {x: [{y: 2, z: 3}, {y: 4, z: 5}]});
|
---|
25 | * //=> {x: [{y: 1, z: 3}, {y: 4, z: 5}]}
|
---|
26 | * R.over(xHeadYLens, R.negate, {x: [{y: 2, z: 3}, {y: 4, z: 5}]});
|
---|
27 | * //=> {x: [{y: -2, z: 3}, {y: 4, z: 5}]}
|
---|
28 | */
|
---|
29 |
|
---|
30 | var lensPath =
|
---|
31 | /*#__PURE__*/
|
---|
32 | _curry1(function lensPath(p) {
|
---|
33 | return lens(path(p), assocPath(p));
|
---|
34 | });
|
---|
35 |
|
---|
36 | export default lensPath; |
---|