GUVI : Zen Code-Sprints :— JavaScript Functions — Warmup Pbms
Problem:
Write a function called “addFive”.
Given a number, “addFive” returns 5 added to that number.
Input:
addFive(5);
addFive(0);
addFive(-5);
Output:
10
5
0
var num = 10;function addFive(num) {
}var result = addFive(num)
Problem:
Write a function called “getOpposite”.
Given a number, return its opposite
Input:
getOpposite(5);
getOpposite(0);
getOpposite(-5);
getOpposite(“5a”);
getOpposite(5.5);
Output:
-5
0
5
-1
-1
var num = 5;function getOpposite(num) {}var result = getOpposite(num)
Problem:
Fill in your code that takes an number minutes and converts it to seconds.
Examples
toSeconds(5) ➞ 300
toSeconds(3) ➞ 180
toSeconds(2) ➞ 120
var min = 5;function toSeconds(min) {}var secs = toSeconds(min)
Problem
Create a function that takes a string and returns it as an integer.
Examples
toInteger(“6”) ➞ 6
toInteger(“1000”) ➞ 1000
toInteger(“12”) ➞ 12
var mystr = "5";function toInteger(mystr) {}var myint = toInteger(mystr)
Problem
Create a function that takes a number as an argument, increments the number by +1 and returns the result.
Examples
nextNumber(0) ➞ 1
nextNumber(9) ➞ 10
nextNumber(-3) ➞ -2
var myint = 0;function nextNumber(myint) {}var myNextint = nextNumber(myint)
Problem
Create a function that takes an array and returns the first element.
Examples
getFirstElement([1, 2, 3]) ➞ 1
getFirstElement([80, 5, 100]) ➞ 80
getFirstElement([-500, 0, 50]) ➞ -500
var arr = [1, 2, 3];function getFirstElement(arr) {}var data = getFirstElement(arr)
Problem
Convert Hours into Seconds
Write a function that converts hours into seconds.
Examples
hourToSeconds(2) ➞ 7200
hourToSeconds(10) ➞ 36000
hourToSeconds(24) ➞ 86400
var arr = [1, 2, 3];function hourToSeconds(arr) {}var data = hourToSeconds(arr)
Problem
Find the Perimeter of a Rectangle
Create a function that takes height and width and finds the perimeter of a rectangle.
Examples
findPerimeter(6, 7) ➞ 26
findPerimeter(20, 10) ➞ 60
findPerimeter(2, 9) ➞ 22
function findPerimeter(num1,num2) {}var peri = findPerimeter(6,7)
Problem
Less Than 100?
Given two numbers, return true if the sum of both numbers is less than 100. Otherwise return false.
Examples
lessThan100(22, 15) ➞ true
// 22 + 15 = 37
lessThan100(83, 34) ➞ false
// 83 + 34 = 117
function lessThan100(num1,num2) {}var res = lessThan100(22,15)
Problem
There is a single operator in JavaScript, capable of providing the remainder of a division operation. Two numbers are passed as parameters. The first parameter divided by the second parameter will have a remainder, possibly zero. Return that value.
Examples
remainder(1, 3) ➞ 1
remainder(3, 4) ➞ 3
remainder(-9, 45) ➞ -9
remainder(5, 5) ➞ 0
function remainder(num1,num2) {}var res = remainder(1,3)
Problem
Old macdonald had a farm:
MacDonald is asking you to tell him how many legs can be counted among all his animals. The farmer breeds three species:
turkey = 2 legs
horse = 4 legs
pigs = 4 legs
The farmer has counted his animals and he gives you a subtotal for each species. You have to implement a function that returns the total number of legs of all the animals.
Examples
CountAnimals(2, 3, 5) ➞ 36
CountAnimals(1, 2, 3) ➞ 22
CountAnimals(5, 2, 8) ➞ 50
function CountAnimals(tur,horse,pigs) {}var legs = CountAnimals(2,3,5)
Problem
Frames Per Second
Create a function that returns the number of frames shown in a given number of minutes for a certain FPS.
Examples
frames(1, 1) ➞ 60
frames(10, 1) ➞ 600
frames(10, 25) ➞ 15000
function frames(num1,num2) {}var fps = frames(1,2)
Problem
Check if an Integer is Divisible By Five
Create a function that returns true if an integer is evenly divisible by 5, and false otherwise.
Examples
divisibleByFive(5) ➞ true
divisibleByFive(-55) ➞ true
divisibleByFive(37) ➞ false
function divisibleByFive(num1) {}var divisible = divisibleByFive(5)
Problem:
Write a function called “isEven”.
Given a number, “isEven” returns whether it is even.
Input:
isEven(12);
isEven(0);
isEven(11);
isEven(“11h”);
Output:
true
true
false
-1
function isEven(num){
// your code here
}var even = isEven(5)
Problem:
Write a function called “areBothOdd”.
Given 2 numbers, “areBothOdd” returns whether or not both of the given numbers are odd.
Input:
areBothOdd(1, 3);
areBothOdd(1, 4);
areBothOdd(2, 3);
areBothOdd(0, 0);
Output:
true
flase
flase
flase
function areBothOdd(num1, num2){
// your code here
}Problem:
Write a function called “getFullName”.
Given a first and a last name, “getFullName” returns a single string with the given first and last names separated by a single space.
Input:
getFullName(“GUVI”, “GEEK”);
getFullName(“GUVI”, );
getFullName(, “GEEK”);
getFullName(“”, “”);
Output:
“GUVI GEEK”
“GUVI”
“GEEK”
“”
function getFullName(firstName, lastName){
// your code here
}Problem:
Write a function called “getLengthOfWord”.
Given a word, “getLengthOfWord” returns the length of the given word.
Input:
getLengthOfWord(“GUVI”);
getLengthOfWord(“”);
getLengthOfWord();
getLengthOfWord(9);
Output:
4
0
-1
-1
function getLengthOfWord(word1){
// your code here
}Problem:
Write a function called “isSameLength”.
Given two words, “isSameLength” returns whether the given words have the same length.
Input:
isSameLength(“GUVI”, “GEEK”);
Output:
true
function isSameLength(word1, word2){
// your code here
}Problem:
Create a function to calculate the distance between two points defined by their x, y coordinates
console.log(getDistance(100, 100, 400, 300));function getDistance(x1, y1, x2, y2)
{
}
Problem:
Write a function called “getNthElement”.
Given an array and an integer, “getNthElement” returns the element at the given integer, within the given array. If the array has a length of 0, it should return ‘undefined’.
Input:
getNthElement([1, 3, 5], 1);
Output:
3
function getNthElement(array,n){
// your code here
}Problem:
Write a function called “getLastElement”.
Given an array, “getLastElement” returns the last element of the given array. If the given array has a length of 0, it should return ‘-1’.
Input:
getLastElement([1, 2, 3, 4]);
Output:
4
function getLastElement(array){
// your code here
}Problem:
Write a function called “getProperty”.
Given an object and a key, “getProperty” returns the value of the property at the given key. If there is no property at the given key, it should return undefined.
var obj = {
mykey: “value”
};
Input:
getProperty(obj,’mykey’);
getProperty(obj,’dummykey’);
Output:
value
NA
var obj = {
mykey: “value”
};function getProperty(obj, key) {
// your code here
}
Problem:
Write a function called “addProperty”.
Given an object and a key, “addProperty” adds a new property on the given object with a value of true.
var obj = {
}
Input:
addProperty(obj, “mykey”);
Output:
{
mykey: true
}
var obj = {
mykey: “value”
};function addProperty(obj, key){
// your code here}
Problem:
Write a function called “removeProperty”.
Given an object and a key, “removeProperty” removes the given key from the given object.
Input:
removeProperty(obj, “name”);
Output:
undefined
function removeProperty(obj, key){
// your code here
}Problem:
Return an array, where the first element is the count of positives numbers and the second element is sum of negative numbers.
var arr = [-5, 10, -3, 12, -9, 5, 90, 0, 1];var ar2 = function countPositivesSumNegatives(arr) {
}console.log(ar2);
Problem:
Create a function that receives an array of numbers and returns an array containing only the positive numbers
function getPositives(ar)
{
// your code here
}var ar = [-5, 10, -3, 12, -9, 5, 90, 0, 1];
var ar2 = getPositives(ar);console.log(ar2);
Problem:
Write a function `powersOfTwo` which will return list of all powers of 2 from 0 to n (where n is an exponent).
n = 0 -> 2⁰ -> [1]
n = 1 -> 2⁰, 2¹ -> [1,2]
n = 2 -> 2⁰, 2¹, 2² -> [1,2,4]
Input:
powersOfTwo(0)
powersOfTwo(1)
powersOfTwo(2)
Output:
1
1,2
1,2,4
function powersOfTwo(n){
return res;
}
Problem:
Find the maximum number in an array of numbers
function findMax(ar)
{
// your code here
}var ar = [-5, 10, -3, 12, -9, 5, 90, 0, 1];
var max = findMax(ar);
console.log(“Max: “, max);
Problem:
Print the first 100 prime numbers
printPrimes(100);// Function prints the first nPrimes numbers
function printPrimes(nPrimes)
{
var n = 0;
var i = 2;
while(n < nPrimes)
{
if (isPrime(i))
{
console.log(n, “ → “, i);
n++;
}
i++;
}
}// Returns true if a number is prime
function isPrime(n)
{
// your code here
}
Problem:
Create a function that will return in an array the first “nPrimes” prime numbers greater than a particular number “startAt”
console.log(getPrimes(10, 100));function getPrimes(nPrimes, startAt)
{// your code here
isPrime(i)
}// Returns true if a number is prime
function isPrime(n)
{
// your code here
}
Problem:
Reverse a string
var s = reverseString("JavaScript");
console.log(s);function reverseString(s)
{
// your code here
}
Problem:
Create a function that will merge two arrays and return the result as a new array
var ar1 = [1, 2, 3];
var ar2 = [4, 5, 6];var ar = mergeArrays(ar1, ar2);
console.log(ar);function mergeArrays(ar1, ar2)
{
var result = [];//this will add the first array to the result array
for(let el of ar1)
{
result.push(el);
}
//Some piece of code goes here
return result;
}
Problem:
Calculate the sum of numbers received in a comma delimited string
console.log(sumCSV(“1.5, 2.3, 3.1, 4, 5.5, 6, 7, 8, 9, 10.9”));function sumCSV(s)
{
// your code here
}
For more advanced programming problems check out Zen JS JSON codeSprint
