Returns a new string in which the first occurence of from in this string is replaced with to, starting from startIndex:
Returns a new string in which the first occurence of from in this string is replaced with to, starting from startIndex:
'0.0001'.replaceFirst(new RegExp(r'0'), ''); // '.0001'
'0.0001'.replaceFirst(new RegExp(r'0'), '7', 1); // '0.7001'