index.js
function insert(arr, index, values) {
  [].splice.apply(arr, [index, 0].concat(values));
}
function insert(arr, index, values) {
  [].splice.apply(arr, [index, 0].concat(values));
}
function insert ( arr , index , values ) { [ ] . splice . apply ( arr , [ index , 0 ] . concat ( values ) ) ; }
Insert array into an other array.

@param {Array}
@param {Number} index
@param {Any} values
@api private
Insert array into an other array .