twoNumberSum.js

function twoNumberSum(array, targetSum) {
  const sortedArray = array.sort((a, b) => a - b)
  const arrLength = array.length
  let rightPointer = arrLength - 1
  const result = []

  let moveRightPointer = (i, rightPointer)  => {
    if(i === rightPointer) {
      return
    }

    if(sortedArray[i] + sortedArray[rightPointer] === targetSum){
        return result.push(sortedArray[i], sortedArray[rightPointer])
      }  
      else {
        return moveRightPointer(i, rightPointer - 1)
      }
    }

    for(let i = 0; i < arrLength; i++) {
      if(i === rightPointer) { rightPointer =  arrLength - 1} 

      else if(sortedArray[i] + sortedArray[rightPointer] === targetSum){
        result.push(sortedArray[i], sortedArray[rightPointer])
      }  
        
        
      else {
         moveRightPointer(i, rightPointer - 1)
      }
  }
  console.log('matched two sum numbers: ', result)
}


// Get arguments from the command line
const args = process.argv.slice(2); // Skips 'node' and filename

const inputArray = JSON.parse(args[0]); // Expecting a string like "[1,2,3]"
const target = Number(args[1]);

twoNumberSum(inputArray, target)

// EXAMPLE FOR A TERMINAL:  node twoNumberSum.js "[-7, 7, 5, 8, 0]" 7