CODEWITHSUNDEEP
dart
Mithson
Mithson

Reputation: 1782

how to replace multiple whitespaces with single whitespace in Dart and Flutter

I am accepting values from textfield and want to remove multiple whitespaces from those values and replace them with single one how can I achieve this in dart so far I have tried,

' '.join(mystring.split())

but this seems not to work as it does in python it throws join cannot be performed on string in dart So how can I do it in dart...

Upvotes: 4

Views: 2980

Answers (3)

lrn
lrn

Reputation: 71903

The smallest and simplest solution would be:

final _whitespaceRE = RegExp(r"\s+");
String cleanupWhitespace(String input) =>
    input.replaceAll(_whitespaceRE, " ");

You can also use split/join:

String cleanupWhitespace(String input) =>
    input.split(_whitespaceRE).join(" ");

It's probably slightly less performant, but unless you're doing it all the time, it's not something which is going to matter.

If performance really matters, and you don't want to replace a single space with another single space, then you can change the RegExp to:

final whitespaceRE = RegExp(r"(?! )\s+| \s+");

Very unlikely to matter just for handling user input.

Upvotes: 14

Daniel_shlomo
Daniel_shlomo

Reputation: 19

def clean_words(Complex_words):
    List_words =Complex_words.split()
    New_word = ""
    for i in List_words:
        New_word = New_word + " "+ i

    return New_word

Upvotes: 0

Ron
Ron

Reputation: 6621

Something like:

final newstring = yourstring.replaceAllMapped(RegExp(r'\b\s+\b'), (match) {
  return '"${match.group(0)}"';
});

or

final newstring = yourstring.replaceAllMapped(new RegExp(r'/\s+/'), (match) {
  return ' ';
});

Upvotes: 0

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