Ablestate Corhort 1 javascript session

Array methods 2

/**
 * array.pop()
 * Removes the last element in the array and returns it.
 * It's an example of a normal method because it doesn't take in parameters and it doesn't return a function
 */

// const ebikaByaBaganda = new Array(
//   "Balangira",
//   "Mamba",
//   "Nyonyi Nyange",
//   "Mbongo"
// );
const ebikaByaBaganda = [ "Balangira", "Mamba","Nyonyi Nyange", "Mbongo"]

const ekikaKyetujemu = ebikaByaBaganda.pop();
const omuwendoGweBikaOmukadde = ebikaByaBaganda.length;

console.log(ebikaByaBaganda);
console.log(ekikaKyetujemu);

console.clear();

let omuwendoGweBikaOmupya = ebikaByaBaganda.push("Ngo", "Mpologoma", "Enjovu", "Nsesnne");

if (omuwendoGweBikaOmupya > omuwendoGweBikaOmukadde){
console.log(omuwendoGweBikaOmupya);
}

/**
 * Extracting values from the array
 */

 //First Element 
console.log(ebikaByaBaganda[0]);
// Last element is  at the position of array lenght - 1
const ekikaEkisembyeyo = ebikaByaBaganda[ebikaByaBaganda.length - 1];
console.log(ekikaEkisembyeyo);

//Extract 3rd and 4th
/**
 * array.slice(begin[,end])
 * Returns the exteacted array based on the begin and end positions
 * Returns all the elements of the array if position are not provided
 * Returns all the elements from the beginning position if the end is not specified/ provided
 */

if (ebikaByaBaganda.length >= 5) {
   const ebikaEbiliWakati = ebikaByaBaganda.slice(2,4);
    if (ebikaEbiliWakati.includes("Mmale"))
    console.log(ebikaEbiliWakati)
}

// what if we don't provide the beginning and ending
let testWithoutPositons = ebikaByaBaganda.slice();
console.log(testWithoutPositons);

// What if we provide the beginning position only
let testWithBeginOnly = ebikaByaBaganda.slice(3);
console.log(testWithBeginOnly);

/**
 * Replacing elements
 * array.splice(index, howMany, [element1][,..., elementN])
 */

 console.log(ebikaByaBaganda)
// let positionOfLastElement = omuwendoGweBikaOmupya - 1;
// let whatHasBeenExtracted = ebikaByaBaganda.splice(omuwendoGweBikaOmupya - 1, 1 );

console.log(ebikaByaBaganda);
//console.log(whatHasBeenExtracted);

let whatHasBeenReplaced = ebikaByaBaganda.splice(
  omuwendoGweBikaOmupya - 1,
  1,
  "Nsenene"
);
console.log(whatHasBeenReplaced);

JavaScript Date method

/**
 * Dates
 * Show today's date and time using Date()
 */
console.clear();
console.log(Date());

// getDate()
let date = new Date();
const dateToday = date.getDate();

console.log(dateToday);

if (dateToday > 3 ) console.log(`${dateToday}th`);

const weekDay = date.getDay();
console.log(weekDay);

const fullYear = date.getFullYear();
console.log(fullYear);

// Calculate age based on year
let age = fullYear - 1990;
console.log(age);

const hour = date.getHours();
console.log(hour);

const milliSeconds = date.getMilliseconds();
console.log(milliSeconds);

const time = date.getTime();
console.log(time);


const timeZoneOffset = date.getTimezoneOffset();

console.log(timeZoneOffset);

const dateAfter2Days = date.setDate(10);

console.log(dateAfter2Days);

// setInterval(() => {
//   console.log(date.toLocalTimeString());
// }, 1000);

let birthDate = new Date("February 24, 1998 23:15:00");

// console.log(speficDate);

let birthDay = birthDate.getDay();
console.log(birthDay);

let weekDays = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"];
//Output day of the week that the person was born
let weekBirthDay = weekDays[birthDay];
console.log(weekBirthDay);