Dart – How to split a String

Like other languages, Dart provides .split(pattern) method to split a string into a list of sub-strings.

Let’s look at below example, it splits a string by spaces:

void main() {
  String str = 'This is a test String.';
  var strList = str.split(' ');
  print(strList);
}


Output

[This, is, a, test, String.]


If the provided pattern/regex is an empty string, it will split your string into single characters:

void main() {
  String str = 'This is a test String.';
  var strList = str.split('');
  print(strList);
}


Output

[T, h, i, s,  , i, s,  , a,  , t, e, s, t,  , S, t, r, i, n, g, .]


If you are good at Regular Expression (RegExp), you can split the string using complicated patterns. In below example, we split string by any number:

void main() {
  const String str = 'This1is2a3test4String.';
  final strList = str.split(RegExp('[0-9]'));
  print(strList);
}


Output

[This, is, a, test, String.]

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Bill
Bill
3 months ago

This example does not work:

void main() {
  String str = 'This1is2a3test4String.';
  var strList = str.split(r'[0-9]');
  print(strList);
}
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