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import _curry1 from './internal/_curry1';import lens from './lens';import nth from './nth';import update from './update';

/** * 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 = _curry1(function lensIndex(n) {  return lens(nth(n), update(n));});export default lensIndex;