Deleting adjacent double letters from an array of a string

Question

I wrote this code to delete certain characters from a string which I convert to an array of characters.

function extractChar(str) {
  var array = [];
  array = str.split('');

  for (i=1;i<arguments.length;i++) {
    for (x=0;x<array.length;x++) {
      if (array[x] === arguments[i]) {
        var temp = array.indexOf(array[x]);
        array.splice(temp,1);
      }
    }
  }
  document.write(array);
}

extractChar('hello my name is frank','f','m','l');

The code works fine for deleting a character that appears once in the array (the 'f' in this case). It also works for deleting double characters that are not adjacent to each other (the 'm's in this case).

However, it does not work for double letters that are adjacent to each other (the 'l's in this case). Why is this? It does work for two different letters that are next to each other (like the 'f' and 'r'). Why not for double letters?

Thank you

Repo · Accepted Answer · 2015-12-03 23:48:34Z

1

When you splice the array, the next index will decrement by one, so you need to decrement your 'x' accordingly =)

function extractChar(str) { var array = []; array = str.split('');

  for (i=1;i<arguments.length;i++) {
    for (x=0;x<array.length;x++) {
      if (array[x] === arguments[i]) {
        var temp = array.indexOf(array[x]);
        array.splice(temp,1);
        x--;
      }
    }
  }
  document.write(array);
}

extractChar('hello my name is frank','f','m','l');

answered Dec 3, 2015 at 23:48

Repo

1,7441 gold badge10 silver badges6 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

CheetahBongos Over a year ago

Worked perfectly! Thank you :)

Richard Hamilton · Accepted Answer · 2015-12-03 23:37:04Z

0

To delete adjacent double letters in JavaScript, do this

function deleteDuplicates(string) {
    return string.replace(/(.)\1{1,}/g, '');
}

deleteDuplicates("hello")
=> "heo"

answered Dec 3, 2015 at 23:37

Richard Hamilton

26.5k11 gold badges65 silver badges88 bronze badges

Collectives™ on Stack Overflow

Deleting adjacent double letters from an array of a string

2 Answers 2

1 Comment

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Related