Question 161557 in Javascript Question posted in
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Can I delete specific duplicate characters from a string in JavaScript?

I’m doing a mail project and it has reply function to particular email. There are pre-written things in reply email like Re: ${Subject of the email}

There is Re: that repeats after 2nd reply so i wrote this in my function in order to remove it:

subject = document.querySelector('#compose-subject').value;

  if (subject.includes("Re: ")){
              subject = subject.replace("Re: ", "");
          }

How do i make this part of code work only for dublicates? Like Re: Re: (removing 2nd Re: )

Now it works even on first Re: and just removing it.

How can i implement it?

Tags:

2

Answers


  1. 0

    Just replace doubles with singles

    console.log(tidy("foo"));
console.log(tidy("Re: foo"));
console.log(tidy("Re: Re: foo"));
console.log(tidy("Re: Re: Re: foo"));


function tidy(input){
  while(input.indexOf("Re: Re: ")>-1){
   input = input.replaceAll("Re: Re: ", "Re: ");
  }
  return input;
}
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  2. 0

    You can use a regexp to replace any number of repeated Re:s with any number of spaces after them with a single Re: :

    var subject = document.querySelector('#compose-subject').value;
subject = subject.replace(/^(Re:s+)+/g, 'Re: ');

    You can add the i flag for case insensitivity too (i.e. /gi instead of /g).

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