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var salesTeam = [{name: {first: 'aleen', last: 'atkins'}, age: 26, sales: '$2314'},
 		{name: {first: 'alvaro', last: 'angelos'}, age: 55, sales: '$1668'},
 		{name: {first: 'denese', last: 'dossett'}, age: 29, sales: '$9248'},
 		{name: {first: 'douglas', last: 'denney'}, age: 53, sales: '$5058'},
 		{name: {first: 'earline', last: 'erickson'}, age: 19, sales: '$18876'},
 		{name: {first: 'herman', last: 'hazell'}, age: 25, sales: '$2746'},
 		{name: {first: 'homer', last: 'hirth'}, age: 26, sales: '$474'},
 		{name: {first: 'hwa', last: 'heidt'}, age: 53, sales: '$9607'},
 		{name: {first: 'hyon', last: 'hampshire'}, age: 46, sales: '$13598'},
 		{name: {first: 'issac', last: 'ingerson'}, age: 45, sales: '$5225'},
 		{name: {first: 'jeraldine', last: 'joplin'}, age: 39, sales: '$2891'},
 		{name: {first: 'jin', last: 'jeffrey'}, age: 17, sales: '$14402'},
 		{name: {first: 'joleen', last: 'jolin'}, age: 45, sales: '$15736'},
 		{name: {first: 'jude', last: 'jarrett'}, age: 53, sales: '$7557'},
 		{name: {first: 'magda', last: 'mireles'}, age: 18, sales: '$1498'},
 		{name: {first: 'mistie', last: 'montealegre'}, age: 31, sales: '$6920'},
 		{name: {first: 'nancy', last: 'napoli'}, age: 49, sales: '$5255'},
 		{name: {first: 'regine', last: 'rohrbaugh'}, age: 33, sales: '$7881'},
 		{name: {first: 'rolando', last: 'riebel'}, age: 35, sales: '$8573'},
 		{name: {first: 'scarlett', last: 'stagg'}, age: 36, sales: '$7126'},
 		{name: {first: 'sherron', last: 'strawn'}, age: 36, sales: '$8848'},
 		{name: {first: 'susan', last: 'shilling'}, age: 29, sales: '$8542'},
 		{name: {first: 'tama', last: 'tworek'}, age: 16, sales: '$9200'},
 		{name: {first: 'tonisha', last: 'taunton'}, age: 41, sales: '$5219'},
 		{name: {first: 'vergie', last: 'villescas'}, age: 25, sales: '$8712'}];
 		
 function capitalize(salesTeam) {
  // your code here
  salesTeam.forEach(function(object_element){
    //get first letter of first name and last name and add that with the rest of your fname/lname string
    var fname = object_element.name.first;
    var lname = object_element.name.last;
    var first_fl = fname.substr(0,1).toUpperCase();
    var last_fl = lname.substr(0,1).toUpperCase();
    object_element.name.first = first_fl + fname.substr(1,fname.length)
    object_element.name.last = last_fl + lname.substr(1,fname.length)
  })

}

capitalize(salesTeam);
//console.log(salesTeam);
//part 2
function assert(expectedBehavior, descriptionOfCorrectBehavior) {
  if (!expectedBehavior) {
    console.log(descriptionOfCorrectBehavior);
  } else {
    console.log('test passed');
  }
}

//Edit the below invocation of the below assert function to use JSON.stringify() where necessary to test your capitalize function.

capitalize(salesTeam);
assert(JSON.stringify(salesTeam[2].name) === JSON.stringify({first: 'Denese', last: 'Dossett'}), 'should capitalize the first letter of the first and last names');

//part 3
//We are interested in knowing how our team is generally performing. Write a function averageTeamSales that takes in the salesTeam array and returns a single number, the average of all sales for the team. Make sure to round up your result.

var averageTeamSales = function (salesTeam) {
  var average= salesTeam.reduce(function(acc,object_element){
    //console.log(object_element.sales)
    var sales = parseInt(object_element.sales.substr(1,object_element.sales.length));
    return acc+sales;
  },0) / salesTeam.length;
  return Math.ceil(average);
}
var res = averageTeamSales(salesTeam);
//part 4
assert( res === 7487, 'should calculate the ave of sales');


//part5

assert( highestEarner === "Earline Erickson: $18876", 'should output "Earline Erickson: $18876"');
var highestEarner = function (salesTeam) {
  var max = salesTeam[0].sales.substr(1,salesTeam[0].sales.length);
  for(var i=0; i<salesTeam.length; i++) {
    if (parseInt(salesTeam[i].sales.substr(1,salesTeam[i].sales.length)) > max) {
      console.log(salesTeam[i].sales.substr(1,salesTeam[i].sales.length))
      max = parseInt(salesTeam[i].sales.substr(1,salesTeam[i].sales.length));
    }
     return max;
  }
};
highestEarner(salesTeam);


//part 6
// Starter Code

function filter(collection, predicate) {
  // Your code below. You must use reduce in your solution.
  if (Array.isArray(collection)) {
    return collection.reduce(function(acc,item){
      if (predicate(item)) {
        acc = acc.concat(item);
      }
      return acc;
    },[]) 
  } else {
    var keys = Object.keys(collection);
    each(function(keys,element,index){
      return collection.reduce(function(acc,item){
        if (predicate(keys[index])) {
          acc = acc.concat(keys[index]);
        }
        return acc;
      },[])
    })
  }
}



// DO NOT ADJUST BELOW FUNCTIONS
function reduce(collection, accumulator, initialValue) {
  each(collection, function(val) {
    if (initialValue !== undefined) {
      initialValue = accumulator(initialValue, val);
    } else {
      initialValue = val;
    }
  })
  return initialValue;
}

function each (collection, callback) {
  if (Array.isArray(collection)) {
    for (let i = 0; i < collection.length; i++) {
      callback(collection[i], i, collection);
    }
  } else {
    for (let key in collection) {
      callback(collection[key], key, collection);
    }
  }
}


var arr = [1, 2, 3, 4];
var obj = {
  a: 1,
  b: 2,
  c: 3,
  d: 4
}

function isEven(val) {
  return val % 2 === 0;
}

function isOdd(val) {
  return !isEven(val);
}

var output1 = filter(arr, isEven);
console.log(output1); // --> [2, 4];

var output2 = filter(obj, isOdd);
console.log(output2); // --> [1, 3];