expandBackTo method Null safety
- Characters target
Expands the range to include the previous occurence of
If there is an occurrence of
target in the characters preceding
the current range, the stat of the the range is moved to just before
the last such occurrence.
If there is no such occurrence of
target, the range is not modified.
true if there is an occurrence of
false if not.
Notice that if
target is empty,
the result is
true even though the range is not modified.
bool expandBackTo(Characters target);