Remove consecutive duplicate characters in a string javascript

Question

I have some string like 11122_11255_12_223_12 and the output I wish to have is this: 12_125_12_23_12
I already looked at this and also this a

Answer 1

If you are intersted in a non-regex way, you can split the items on the _, and then map that by creating a Set of characters which will remove duplicates. Then you just join the data back together. Like this:

var str = '11122_11255_12_223_12';
let result = str
  // Split on the underscore
  .split('_')
  // map the list
  .map(i =>
    // Create a new set on each group of characters after we split again
    [...new Set(i.split(''))].join('')
  )
  // Convert the array back to a string
  .join('_')

console.log(result)