checkIndexes method
Implementation
int checkIndexes(String searchedKey) {
var i = -1;
if (i == -1 || i < searchedKey.length) {
while (this!.contains(searchedKey, i + 1)) {
i = this!.indexOf(searchedKey, i + 1);
if (i == 0 ||
(i > 0 &&
(RegExp("[^A-Za-z0-9 ]").hasMatch(this!.split("")[i]) ||
this!.split("")[i] == " "))) {
return i;
}
i++;
}
}
return -1;
}