31 lines
943 B
JavaScript
31 lines
943 B
JavaScript
|
import _curry3 from "./internal/_curry3.js";
|
||
|
|
/**
|
||
|
|
* Inserts the supplied element into the list, at the specified `index`. _Note that
|
||
|
|
|
||
|
|
* this is not destructive_: it returns a copy of the list with the changes.
|
||
|
|
* <small>No lists have been harmed in the application of this function.</small>
|
||
|
|
*
|
||
|
|
* @func
|
||
|
|
* @memberOf R
|
||
|
|
* @since v0.2.2
|
||
|
|
* @category List
|
||
|
|
* @sig Number -> a -> [a] -> [a]
|
||
|
|
* @param {Number} index The position to insert the element
|
||
|
|
* @param {*} elt The element to insert into the Array
|
||
|
|
* @param {Array} list The list to insert into
|
||
|
|
* @return {Array} A new Array with `elt` inserted at `index`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* R.insert(2, 'x', [1,2,3,4]); //=> [1,2,'x',3,4]
|
||
|
|
*/
|
||
|
|
|
||
|
|
var insert =
|
||
|
|
/*#__PURE__*/
|
||
|
|
_curry3(function insert(idx, elt, list) {
|
||
|
|
idx = idx < list.length && idx >= 0 ? idx : list.length;
|
||
|
|
var result = Array.prototype.slice.call(list, 0);
|
||
|
|
result.splice(idx, 0, elt);
|
||
|
|
return result;
|
||
|
|
});
|
||
|
|
|
||
|
|
export default insert;
|