TODO.js

/*this challenge should you choose to accept it:
attempt at least 2 out of 3*/

//use this log where ncessary and when you want to log something:
const { log } = console;


//use this html to test your code in the browser:
const sumOfNumber = document.querySelector(".sum-of-no");
const lengthOfArr = document.querySelector(".len-of-arr");
const totalItemsOfArr = document.querySelector(".len-of-arr");
const NumOfChoice = document.querySelector(".num-of-choice");
const firstAndLastName = document.querySelector(".first-and-last-name");
const fiveLetterLong = document.querySelector(".five-letters-long");
const countryWithAatTheEnd = document.querySelector(".country-with-a-at-end");
const countryStartingWithN = document.querySelector(
  ".country-with-starting-with-n"
);
const countryWithAInMiddle = document.querySelector(
  ".country-with-a-in-middle"
);


/*--==============================-----------------------=======================-----------------------=======================*/

//hint: to insert your result in the html, use the textContent property of the element you want to insert the result in.
//e.g: sumOfNumber.textContent = yourResult;

//array 1
const arrOfNum = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];

//1. Write a function that takes an array of numbers and returns the sum of all the numbers.

//2. Write a function that takes an array of numbers and return the total items in the array.

//3. write a function that takes an array of numbers and returns a number you want from the array.

/*--==============================-----------------------=======================-----------------------=======================*/

//array 2
const arrOfName = ["Peter", "Paul", "Mary", "John", "Jane"];

//1. Write a function that takes an array of names and returns the first name and last name.

//2. write a function that takes an array of names and return the name that is 5 letters long.

//3. write a function that takes an array of names and returns (your name) at the end of the array.

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//array 3
const arrOfCountry = ["USA", "UK", "Germany", "France", "Nigeria"];

//1. Write a function that takes an array of countries and returns the country that starts with the letter 'N'.

//2. Write a function that takes an array of countries and returns the country that ends with the letter 'A'.

//3. Write a function that takes an array of countries and returns the country that has the letter 'a' in the middle.

/*--==============================-----------------------=======================-----------------------=======================*/

//array 4
const arrOfObject = [
  { name: "Peter", age: 30, country: "USA" },
  { name: "Paul", age: 25, country: "UK" },
  { name: "Mary", age: 28, country: "Germany" },
  { name: "John", age: 35, country: "France" },
  { name: "Jane", age: 28, country: "Nigeria" },
];

//1 write a function that takes an array of objects then loop through the array in 3 types of looping an array of objects.
//this 3 methods must be in 3 different functions.

//2 write a function that takes an array of objects and returns the object that has age that is greater than 20 and less than 30.

//3 write a function that takes an array of objects and returns the object that has name that is 'John'.