addBMI static method
Implementation
static Map<String, dynamic> addBMI(Map<String, dynamic>m) {
if(int.tryParse(m[weight])==null||string2inch(m[height])==null)return m;
double bmiN = calc_BMI(
int.tryParse(m[weight])!,
string2inch(m[height])!);
return m..[bmi] = (bmiN * 100).floor() / 100;
}