lensProp.js•754 B
var _curry1 = require('./internal/_curry1');
var assoc = require('./assoc');
var lens = require('./lens');
var prop = require('./prop');
/**
* Returns a lens whose focus is the specified property.
*
* @func
* @memberOf R
* @since v0.14.0
* @category Object
* @typedefn Lens s a = Functor f => (a -> f a) -> s -> f s
* @sig String -> Lens s a
* @param {String} k
* @return {Lens}
* @see R.view, R.set, R.over
* @example
*
* var xLens = R.lensProp('x');
*
* R.view(xLens, {x: 1, y: 2}); //=> 1
* R.set(xLens, 4, {x: 1, y: 2}); //=> {x: 4, y: 2}
* R.over(xLens, R.negate, {x: 1, y: 2}); //=> {x: -1, y: 2}
*/
module.exports = _curry1(function lensProp(k) {
return lens(prop(k), assoc(k));
});