Vectormike

const getSum = function(num) {
  return num + num;
}

getSum(9);

Vectormike

const addNum = getSum;

addNum(9);

Vectormike

function a(x) {
  return x * 2;
}

function b(x) {
  return x + 1;
}

function c(x) {
  return x * 3;

Vectormike

function isLarge(value) {
  return value > 10;
}

const dataArray = [10, 11, 12, 3, 4];


const filteredArray = dataArray.filter(isLarge);
console.log(filteredArray); // [11, 12]

Vectormike

function squareRoot(value) {
  return Math.sqrt(value)
}

const dataArray = [4, 9, 16];


const mappedArray = dataArray.map(squareRoot);
console.log(mappedArray); // [2, 3, 4]

Vectormike

let data = [1, 2, 3, 4, 4];

data[4] = 5;

console.log(data); // [1, 2, 3, 4, 5]

Vectormike

const names = ["Alex", "Victor", "John", "Linda"]

const newNamesArray = names.slice(1, 3) // ["Victor", "John"]

Vectormike

const employee = {
  name: "Victor",
  designation: "Writer",
  address: {
    city: "Lagos"
  }
};

Object.freeze(employee);

Vectormike

// Function to filter an array; return greater than 5 numbers

const filterArray = (array) => {
  let filteredArray = [];
  for(let i = 0; i < array.length; i++) {
    if(array[i] > 5) {
      filteredArray.push(array[i]);
     }
  }
  return filteredArray;

Vectormike

// Filter method to give us a new array

const filterArray = array => array.filter(x => x > 5);

const array = [1, 2, 3, 4, 5, 6, 7, 8];

console.log(filterArray(array)); // [6, 7, 8]