sumOfTwo via. Web

sumOfTwo.js

function sumOfTwo(a, b, v) {  
  a.sort()
  b.sort()
  
  for(i in a) {
    var target = v - a[i]
    if (binary_Search(b, target) > -1) {
      console.log(target)
      return true
    }
  }
  
  return false
}

function binary_Search(items, value){
  var firstIndex  = 0,
      lastIndex   = items.length - 1,
      middleIndex = Math.floor((lastIndex + firstIndex)/2);

  while( items[middleIndex] != value && firstIndex < lastIndex) {
    if ( value < items[middleIndex] ) {
      lastIndex = middleIndex - 1;
    } 
    else if ( value > items[middleIndex] ) {
      firstIndex = middleIndex + 1;
    }

    middleIndex = Math.floor((lastIndex + firstIndex)/2);
  }

 return (items[middleIndex] != value) ? -1 : middleIndex;
}
// var items = [1, 2, 3, 4, 5, 7, 8, 9];
// console.log(binary_Search(items, 10));