facebook.js

facebook.js

var rawAnswers = [38,264,35];

// Truncate eg 12345 to 12 to account for data errors. 
var answers = [];
rawAnswers.forEach(function(e, i, c) {
  answers.push(parseInt(e.toString().substring(0,2)));
});


var correct=0,sum=0,b=[], mode='', maxi=0;
answers.forEach(function(e) {
  // Find correct answers:
  if(e==40) {
    correct++;
  }
  // For average
  sum+=e;
  // Find mode
  if(b[e]) {
      b[e]++;
  } else {
    b[e]=1;
  }
  if(maxi<b[e]) {
    mode=e;
    maxi=b[e];
  }
});

answers = answers.sort();

console.log("Num: "+answers.length+", Correct:"+correct+" ("+Math.round(correct/answers.length*100)+"%), Min: "+answers[0]+", Max: "+answers[answers.length-1]+", Mode: "+mode+", Avg: "+Math.round(sum/answers.length));