test-action-debian-package/node_modules/ramda/es/move.js
2020-11-12 16:37:43 +01:00

32 lines
1.2 KiB
JavaScript

import _curry3 from "./internal/_curry3.js";
/**
* Move an item, at index `from`, to index `to`, in a list of elements.
* A new list will be created containing the new elements order.
*
* @func
* @memberOf R
* @since v0.27.1
* @category List
* @sig Number -> Number -> [a] -> [a]
* @param {Number} from The source index
* @param {Number} to The destination index
* @param {Array} list The list which will serve to realise the move
* @return {Array} The new list reordered
* @example
*
* R.move(0, 2, ['a', 'b', 'c', 'd', 'e', 'f']); //=> ['b', 'c', 'a', 'd', 'e', 'f']
* R.move(-1, 0, ['a', 'b', 'c', 'd', 'e', 'f']); //=> ['f', 'a', 'b', 'c', 'd', 'e'] list rotation
*/
var move =
/*#__PURE__*/
_curry3(function (from, to, list) {
var length = list.length;
var result = list.slice();
var positiveFrom = from < 0 ? length + from : from;
var positiveTo = to < 0 ? length + to : to;
var item = result.splice(positiveFrom, 1);
return positiveFrom < 0 || positiveFrom >= list.length || positiveTo < 0 || positiveTo >= list.length ? list : [].concat(result.slice(0, positiveTo)).concat(item).concat(result.slice(positiveTo, list.length));
});
export default move;