Icard/angular-clarity-master(work.../node_modules/ramda/es/lensIndex.js

32 lines
826 B
JavaScript

import _curry1 from "./internal/_curry1.js";
import lens from "./lens.js";
import nth from "./nth.js";
import update from "./update.js";
/**
* Returns a lens whose focus is the specified index.
*
* @func
* @memberOf R
* @since v0.14.0
* @category Object
* @typedefn Lens s a = Functor f => (a -> f a) -> s -> f s
* @sig Number -> Lens s a
* @param {Number} n
* @return {Lens}
* @see R.view, R.set, R.over, R.nth
* @example
*
* const headLens = R.lensIndex(0);
*
* R.view(headLens, ['a', 'b', 'c']); //=> 'a'
* R.set(headLens, 'x', ['a', 'b', 'c']); //=> ['x', 'b', 'c']
* R.over(headLens, R.toUpper, ['a', 'b', 'c']); //=> ['A', 'b', 'c']
*/
var lensIndex =
/*#__PURE__*/
_curry1(function lensIndex(n) {
return lens(nth(n), update(n));
});
export default lensIndex;