tryInsert method
Inserts an element into the iterable at the specified index.
Takes the specified element and inserts it into the iterable at the
position index
.
If index
is less than zero, an ArgumentError is thrown.
If iteration of this iterable is exausted before the position index
is reached, value
is not inserted and this iterable is unchanged.
Implementation
Iterable<T> tryInsert(int index, T value) sync* {
if (index == 0) {
yield* prepend(value);
return;
}
if (index < 0) {
throw ArgumentError('Parameter "index" must be greater than zero.');
}
final iterator = this.iterator;
var i = 0;
while (iterator.moveNext()) {
if (i == index) {
yield value;
}
yield iterator.current;
i++;
}
}