count method
Returns the number of non-overlapping occurrences of find in this
string.
Example:
'hello'.count('l'); // 2
'aaa'.count('aa'); // 1 (non-overlapping)
'test'.count('x'); // 0
'hello'.count(''); // 0
Implementation
@useResult
int count(String find) {
if (find.isEmpty) {
return 0;
}
return split(find).length - 1;
}