insert method

void insert (
  1. int index,
  2. E element
)
override

Inserts element at position index in this list.

This increases the length of the list by one and shifts all objects at or after the index towards the end of the list.

The list must be growable. The index value must be non-negative and no greater than length.

Implementation

void insert(int index, E element) {
  checkNotNullable(index, "index");
  var length = this.length;
  RangeError.checkValueInInterval(index, 0, length, "index");
  add(element);
  if (index != length) {
    setRange(index + 1, length + 1, this, index);
    this[index] = element;
  }
}

© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dart.dev/stable/2.13.0/dart-collection/ListMixin/insert.html