pchanie JavaScript w określonym indeksie
arr.splice(index, 0, item);
//explanation:
inserts "item" at the specified "index",
deleting 0 other items before it
Dark Dotterel
arr.splice(index, 0, item);
//explanation:
inserts "item" at the specified "index",
deleting 0 other items before itmyArray.splice(index, 0, item);var arr = [];
arr[0] = "Jani";
arr[1] = "Hege";
arr[2] = "Stale";
arr[3] = "Kai Jim";
arr[4] = "Borge";
console.log(arr.join());
arr.splice(2, 0, "Lene");
console.log(arr.join());