'How to remove all whitespace of a string in Dart?

Using trim() to eliminate white space in Dart and it doesn't work. What am I doing wrong or is there an alternative?

       String product = "COCA COLA";

       print('Product id is: ${product.trim()}');

Console prints: Product id is: COCA COLA

stringflutterdartwhitespace


Solution 1:[1]

This would solve your problem

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

Solution 2:[2]

the Trim method just remove the leading and trailing. Use Regexp instide: Here is an example: Dart: Use regexp to remove whitespaces from string

Solution 3:[3]

I know that this question has pretty good answers, but I want to show a fancy way to remove all whitespace in a string. I actually thought that Dart should've had a built-in method to handle this, so I created the following extension for String class:

extension ExtendedString on String {
  /// The string without any whitespace.
  String removeAllWhitespace() {
    // Remove all white space.
    return this.replaceAll(RegExp(r"\s+"), "");
  }
}

Now, you can use it in a very simple and neat way:

String product = "COCA COLA";
print('Product id is: ${product.removeAllWhitespace()}');

Solution 4:[4]

You can try this:

String product = "COCA COLA";

print(product.split(" ").join(""));   // COCACOLA

Solution 5:[5]

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(' ', '');
  }
}

Solution 6:[6]

There are so many ways to do this.

The most obvious one:

String product = "COCA COLA";
print('Product id is: ${product.replaceAll(' ', '')}');  // COCACOLA

With regular function:

String removeAllWhitespaces(String string) {
  return string.replaceAll(' ', '');
}

String product = "COCA COLA";
print('Product id is: ${removeAllWhitespaces(product)}');  // COCACOLA

With extension method:

extension StringRemoveWhitespace on String { 
String get removeAllWhitespaces => replaceAll(' ', '');  // COCACOLA
}

String product = "COCA COLA";
print('Product id is: ${product.removeAllWhitespaces}');

Solution 7:[7]

var s = "Coca Cola"; s.replaceAll(' ','');

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 Christopher Moore
Solution 2 ShrJamal
Solution 3 Stewie Griffin
Solution 4 mdev
Solution 5 Giles Correia Morton
Solution 6 Talat El Beick
Solution 7 Sbr777

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