numericOnly method
Extract numeric value of string Example: OTP 12312 27/04/2020 => 1231227042020ß If firstword only is true, then the example return is "12312" (first found numeric word)
Implementation
String numericOnly({bool firstWordOnly = false}) {
var numericOnlyStr = '';
for (var i = 0; i < length; i++) {
if (regMatch(RegPatterns.isNumericOnly)) {
numericOnlyStr += this[i];
}
if (firstWordOnly && numericOnlyStr.isNotEmpty && this[i] == " ") {
break;
}
}
return numericOnlyStr;
}