Absolute Diagonal Difference

abs-diagonal-difference.js

function processData(input) {
  var tokenized = input.split("\n").slice(1).map(function(current) { return current.split(/\s/); }), count = 0;    
  var l2R = tokenized.reduce(function(total, current) { return Number(total) + Number(current[count++]); }, 0);
  var r2L = tokenized.reduce(function(total, current) { return Number(total) + Number(current[--count]); }, 0);        
  console.log(Math.abs(l2R -r2L));
}