lensPath.js•819 B
var _curry1 = require('./internal/_curry1');
var assocPath = require('./assocPath');
var lens = require('./lens');
var path = require('./path');
/**
* Returns a lens whose focus is the specified path.
*
* @func
* @memberOf R
* @since v0.19.0
* @category Object
* @typedefn Lens s a = Functor f => (a -> f a) -> s -> f s
* @sig [String] -> Lens s a
* @param {Array} path The path to use.
* @return {Lens}
* @see R.view, R.set, R.over
* @example
*
* var xyLens = R.lensPath(['x', 'y']);
*
* R.view(xyLens, {x: {y: 2, z: 3}}); //=> 2
* R.set(xyLens, 4, {x: {y: 2, z: 3}}); //=> {x: {y: 4, z: 3}}
* R.over(xyLens, R.negate, {x: {y: 2, z: 3}}); //=> {x: {y: -2, z: 3}}
*/
module.exports = _curry1(function lensPath(p) {
return lens(path(p), assocPath(p));
});