speedsums-cheat.js

/*
 * Script to cheat SpeedSums.com test
 */


function getResult(expression){
  var regex = /\s*(\d+)\s*([^\s])\s*(\d+)/;
  var matches = regex.exec(expression);
  if (matches){
    var x = parseInt(matches[1], 10),
        op = matches[2],
        y = parseInt(matches[3], 10);
    switch(op){
      case '+': return x+y;
      case '-': return x-y;
      case 'x': return x*y;
      case '÷': return x/y;
      default: console.log('Operation ' + op + ' not supported');
    }
  }
}

function solve(){
  var answer = $('#answer');
  if (answer.size() === 0){
    return;
  }
  
  var current = answer.val();
  if (!current){
    var text = $('#question').text();
    var result = getResult(text);
    if (typeof result !== 'number'){
      alert('Expression ' + text + ' cannot be solved');
      return;
    }
    answer.val(result);
    answer.trigger('keyup');
  }
  setTimeout(solve, 100);
}

solve();