Earlier we have been through various articles like how to format an interpolated string in flutter so in this article we will go through how to remove all whitespace of a string in dart?

How to Remove All Whitespace of a String In Dart?

User can try the below solutions:

String product = "COCA COLA";
print('Product id is: ${product.replaceAll(new RegExp(r"\s+\b|\b\s"), "")}');

Update:

String name = '4 ever 1 k g @@ @';
print(name.replaceAll(new RegExp(r"\s+"), ""));

This would solve your problem

String name = "COCA COLA";
print(name.replaceAll(' ', ''));

Use Trim Function():

String name = "Stack Overflow";
print(name.trim());

In case this is of any help to someone in the future, for convenience you can define an extension method to the String class:

extension StringExtensions on String {
  String removeWhitespace() {
    return this.replaceAll(' ', '');
  }
}

This can be called like product.removeWhiteSpace() I’ve used it in the past to create a helper method when sorting lists by a string whilst ignoring case and whitespace.

extension StringExtensions on String {
  String toSortable() {
    return this.toLowerCase().replaceAll(' ', '');
  }
}

• print(' COCA COLA'.trim()); // Output: 'COCA COLA'
  print('COCA COLA '.trim()); // Output: 'COCA COLA'
  print(' COCA COLA '.trim()); // Output: 'COCA COLA'
• print(' COCA COLA '.trimLeft()); // Output: 'COCA COLA '
  print(' COCA COLA '.trimRight()); // Output:' COCA COLA'If the String can be null, you can consider using the null-aware operator.String s = null;
  print(s?.trim());The above code will return null instead of throwing NoSuchMethodError.
• String replaceWhitespacesUsingRegex(String s, String replace) {
  if (s == null) {
  return null;
  }
  
  // This pattern means "at least one space, or more"
  // \\s : space
  // + : one or more
  final pattern = RegExp('\\s+');
  return s.replaceAll(pattern, replace);
  }Call like a below:print(replaceWhitespacesUsingRegex('One Two Three Four', '')); // Output: 'OneTwoThreeFour'

Conclusion:

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In this article, we have been through how to remove all whitespace of a string in dart?

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