Given a double, I want to round it to a given number of points of precision after the decimal point, similar to PHP’s round() function.
The closest thing I can find in the Dart docs is double.toStringAsPrecision(), but this is not quite what I need because it includes the digits before the decimal point in the total points of precision.
For example, using toStringAsPrecision(3):
0.123456789 rounds to 0.123
9.123456789 rounds to 9.12
98.123456789 rounds to 98.1
987.123456789 rounds to 987
9876.123456789 rounds to 9.88e+3
As the magnitude of the number increases, I correspondingly lose precision after the decimal place.
