https://www.freecodecamp.org/learn/coding-interview-prep/algorithms/pairwisehttps://www.freecodecamp.org/learn/coding-interview-prep/algorithms/pairwise

Contributors
#1

What is your hint or solution suggestion?

function pairwise(arr, arg) {
  const indices =[]
  arr.forEach((e,i) => {
    let res = arr.filter((e1,i1)=> e1==(arg-e) && i1>i)[0];
    let ind = arr.indexOf(res,i+1)
    if (ind!=-1) { 
      arr[i]='x'
      arr[ind]='x'
      indices.push(i,ind) 
      };
  });
  return indices.reduce((a,b)=> a+b, 0)
}

Challenge: Pairwise

Link to the challenge:

#2

Hello there.

Thank you, for your contribution. For future contributions, please wrap your solution within :

[details]
```
code goes here...
```
[/details]

Also, provide all of the necessary code to pass the challenge.

Also, when you enter a code block into a forum post, please precede it with a separate line of three backticks and follow it with a separate line of three backticks to make it easier to read.

You can also use the “preformatted text” tool in the editor ( </> ) to add backticks around text.

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See this post to find the backtick on your keyboard.
Note: Backticks (`) are not single quotes (’).

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