//example 1 reduce

var giveTrue = [4, 8, 15, 16, 23, 42];
var giveFalse = [4, 5, 2, 18];

function isAscendant(numbers) {
  return numbers.reduce(function (acc, item, index, self) {
    return acc && self[index] > self[index - 1];
  });
}

console.log(isAscendant(giveTrue));
console.log(isAscendant(giveFalse));
// true
// false



//example 2 reduce

var people = [
	{ name: "Candice", age: 25 },
	{ name: "Tammy",   age: 30 },
	{ name: "Allen",   age: 49 },
	{ name: "Nettie",  age: 21 },
	{ name: "Stuart",  age: 17 }
];
var ages = people.reduce(function(sum, person){
  return sum + person.age;
}, 0);

console.log(ages);
// 142




var menu = [
  { name: "Carrots", calories: 150 },
  { name: "Steak", calories: 350 },
  { name: "Broccoli", calories: 120 },
  { name: "Chicken", calories: 250 },
  { name: "Pizza", calories: 520 }
];

var averageCalories = menu.reduce(function( acc, item, index, self){
  return acc + item.calories / self.length;
}, 0);

console.log(averageCalories);
// 278




// filter example

var numbers = [1, 2, 3, 4, 5, 6];

var evens = numbers.filter(function(number){
	return number % 2 === 0;
});

console.log(evens);
// [ 2, 4, 6 ]



// example sort

var numbers = [1, 3, 4, 6, 5, 2];

var sortedNumbers = numbers.sort(function(a, b) {
  if (a > b) return -1;
  if (a < b) return 1;
  return 0;

});

console.log(sortedNumbers);


// example sort quick

var numbers = [1, 3, 4, 6, 5, 2];

var sortedNumbers = numbers.sort(function(a, b) {
//  if (a > b) return -1;
 // if (a < b) return 1;
  return  b - a;

});

console.log(sortedNumbers);