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I have a string containing 3 or 4 double numbers. what's the best way to extract them in an array of numbers?

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    Please post the string. There are many ways how 3 or 4 double numbers can be contained in a string. Commented Aug 25, 2018 at 15:58
  • it might be like"Points (64.5464864, 34.668464)" I'm not just looking for a way for a special data. it will be so good if it was a more generic way; Commented Aug 25, 2018 at 21:34

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First you have to find the numerals. You can use a RegExp pattern for that, say:

var doubleRE = RegExp(r"-?(?:\d*\.)?\d+(?:[eE][+-]?\d+)?");

Then you parse the resulting strings with double.parse. Something like:

var numbers = doubleRE.allMatches(input).map((m) => double.parse(m[0])).toList();
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