zeptobook

var numbers = [50, 25, 40, 16, 29];

var numOver30 = numbers.filter(function(value, index, array){
	return value > 30;
});

zeptobook

var numOver30 = numbers.filter(function(value){
	return value > 30;
});

zeptobook

var prntVal = "";
var names = ['Frank', 'Charles', 'Dolly', 'Robert', 'Bob'];

names.forEach(function(value){
    prntVal = prntVal + 'Hello '+ value +"<br/>";
});

zeptobook

var nums = [10, 20, 30, 40, 50];

var sum = nums.reduce(function(total, value){
	return total + value;
});

zeptobook

var sum = nums.reduce(function(total, value, index, array){
	return total + value;
});

zeptobook

var nums = [10, 20, 30, 40, 50];

var sum = nums.reduceRight(function(total, value){
	return total + value;
});

zeptobook

var nums = [10, 20, 30, 40, 50];

var over30 = nums.some(function(value){
	return value > 30;
});

zeptobook

var nums = [10, 20, 30, 40, 50];

var Allover30 = nums.every(function(value){
	return value > 30;
});

zeptobook

var nums = [10, 20, 30, 40, 50];

var firstNum = nums.find(function(value){
	return value > 30
});

zeptobook

var nums = [10, 20, 30, 40, 50];

var findNumIndex = nums.findIndex(function(value){
	return value > 30
});