splitBeforeIndex method Null safety
- int index
Returns a list of two sub-lists based off self:
List 1: All items before specified index
List 2: All items after specified index
Negative [-1]
is the same as the last list item and all negative numbers are likewise
0 leads to [[],[this]]
whereas an index>this.length leads to [this,[]]
Implementation
List<List<E>> splitBeforeIndex(int index) {
while (index < 0) {
index += length;
}
List<List<E>> newList = [[], []];
for (int i in range(length)) {
if (i >= index) {
newList[1].add(this[i]);
} else {
newList[0].add(this[i]);
}
}
return newList;
}