Cambiar la matriz de índice JavaScript
Array.prototype.move = function(from, to) {
this.splice(to, 0, this.splice(from, 1)[0]);
};
MM.Mirzaei.Dev
Array.prototype.move = function(from, to) {
this.splice(to, 0, this.splice(from, 1)[0]);
};function moveArrayItemToNewIndex(arr, old_index, new_index) {
if (new_index >= arr.length) {
var k = new_index - arr.length + 1;
while (k--) {
arr.push(undefined);
}
}
arr.splice(new_index, 0, arr.splice(old_index, 1)[0]);
return arr;
};
//move index 1(b) to index 2(c)
console.log(moveArrayItemToNewIndex(["a","b","c","d"], 1, 2)); // returns ["a", "c", "b", "d"]