parse static method
Implementation
static LexoInteger parse(String strFull, LexoNumeralSystem system) {
var str = strFull;
var sign = 1;
if (identical(strFull.indexOf(system.getPositiveChar()), 0)) {
str = strFull.substring(1);
} else if (identical(strFull.indexOf(system.getNegativeChar()), 0)) {
str = strFull.substring(1);
sign = -1;
}
final mag = List<int>.filled(str.length, 0);
var strIndex = mag.length - 1;
for (var magIndex = 0; strIndex >= 0; ++magIndex) {
mag[magIndex] = system.toDigit(str[strIndex]);
--strIndex;
}
return LexoInteger.make(system, sign, mag);
}