how to replace special characters in a string by "

hello i have a string ch and i want to replace the special characters if it exist by "_" how can detect all special characters is there another way . can we use replaceAll and include all the special characters

  for(int i=0; i<s.length; i  ) {
  var char = s[i];
  if (char = "/" || char ="." || char ="$")
  {
      s[i] ="_"
  } 
}

CodePudding user response：

You can do it like this with regex

_string.replaceAll(RegExp('[^A-Za-z0-9]'), '_');

This will replace all characters except alphabets and numbers with _

CodePudding user response：

The best way to do this would be to use RegEx inside a .replaceAll() method. In your case you can use a regex that matches all character other than English Alphabets..

String result = s.replaceAll(RegExp('[^A-Za-z]'), '_');

Or you can be more specific and create a regex of your requirement