How to remove all whitespace of a string in Dart?
This would solve your problem
String name = "COCA COLA";print(name.replaceAll(' ', ''));
Try this
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(RegExp(r"\s+"), ""));
Another easy solution:
String name = '4 ever 1 k g @@ @';print(name.replaceAll(' ', '');
Using regular expression (
RegExp
)If the original string contains multiple whitespaces and you want to remove all whitespaces. Apply below solution
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 this
print(replaceWhitespacesUsingRegex('One Two Three Four', '')); // Output: 'OneTwoThreeFour'
Using
trim()
trim()
method is used to remove leading and trailing whitespaces. It doesn't mutate the original string. If there is no whitespace at the beginning of the end of the String, it will return the original value.print(' COCA COLA'.trim()); // Output: 'COCA COLA'print('COCA COLA '.trim()); // Output: 'COCA COLA'print(' COCA COLA '.trim()); // Output: 'COCA COLA'
Using
trimLeft()
andtrimRight()
What if you want to trim at the beginning only but not at the end, or maybe the opposite way. You can use
trimLeft
for removing leading whitespaces only andtrimRight
which removes trailing whitespaces only.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 throwingNoSuchMethodError
.
This answer from and author : https://www.woolha.com/tutorials/dart-trim-whitespaces-of-a-string-examples