Algorithm Questions

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Get Weekdays based on input number

				
					//Get weekdays
//if you pass 0 --> Sunday
//if you pass 1 --> Monday and so on...if 8 --> undefined ...
const Weekdays = {
  Sunday: 0,
  Monday: 1,
  Tuesday: 2,
  Wednesday: 3,
  Thursday: 4,
  Friday: 5,
  Saturday: 6,
};
Object.freeze(Weekdays);
//you cannot add new properties nor you can alter the existing properties...

console.log(`%c ${Weekdays}`, "color:red;font-size:20px");
console.log(`%c ${Weekdays["Wednesday"]}`, "color:red;font-size:20px");

//Getting key based on value .. if id is 4--> so if value is 4 --> Output should be -->Thursday

const getWeekdays = (id) => {
  let day = Object.keys(Weekdays).find((key) => Weekdays[key] === id);
  console.log(`%c ${day}`, "color:red;font-size:20px");
};

getWeekdays(4); //Thursday
getWeekdays(14); //undefined
				
			
				
					const Weekdays = Object.freeze({
  Sunday: 0,
  Monday: 1,
  Tuesday: 2,
  Wednesday: 3,
  Thursday: 4,
  Friday: 5,
  Saturday: 6,
});

Get Weekdays based on input number- Key-value is swapped

				
					const Weekdays = {
  0: "Sunday",
  1: "Monday",
  2: "Tuesday",
  3: "Wednesday",
  4: "Thursday",
  5: "Friday",
  6: "Saturday",
};
Object.freeze(Weekdays);

console.log(`%c ${Weekdays[2]}`, "color:red;font-size:20px");

const getWeekdays = (id) => {
  console.log(`%c ${Weekdays[id]}`, "color:red;font-size:20px");
};

getWeekdays(2); //Tuesday
getWeekdays(12); //undefined

Using Switch Statement - direct return 

				
					const getWeekdays = (id) => {
  switch (id) {
    case 0:
      return "Sunday";
    case 1:
      return "Monday";
    case 2:
      return "Tuesday";
    case 3:
      return "Wednesday";
    case 4:
      return "Thursday";
    case 5:
      return "Friday";
    case 6:
      return "Saturday";
    default:
      break;
  }
};

console.log(`%c ${getWeekdays(3)}`, "color:red;font-size:20px");

Switch Statement - using break

				
					const getWeekdays = (id) => {
  let weekday = "";
  switch (id) {
    case 0:
      weekday = "Sunday";
      break;
    case 1:
      weekday = "Monday";
      break;
    case 2:
      weekday = "Tuesday";
      break;
    case 3:
      weekday = "Wednesday";
      break;
    case 4:
      weekday = "Thursday";
      break;
    case 5:
      weekday = "Friday";
      break;
    case 6:
      weekday = "Saturday";
      break;
    default:
      break;
  }
  return weekday;
};

console.log(`%c ${getWeekdays(3)}`, "color:red;font-size:20px");

Divisible by 3 -FIZZ, Divisible by 5 -BUZZ,
Divisible by 3 and 5 - FIZZBUZZ 

				
					const fizbuzz = () => {
  for (let i = 1; i <= 100; i++) {
    if (i % 5 === 0 && i % 3 === 0) console.log(i + "FIZZBUZZ");
    else if (i % 3 === 0) console.log(i + "FIZZ");
    else if (i % 5 === 0) console.log(i + "BUZZ");
    else console.log(i);
  }
};

fizbuzz();

				
			
				
					const fizbuzz = () => {
  for (let i = 1; i <= 100; i++) {
    if (i % 5 === 0 && i % 3 === 0) {
      console.log(i + "FIZZBUZZ");
      i++;
    }
    if (i % 3 === 0) {
      console.log(i + "FIZZ");
      i++;
    }
    if (i % 5 === 0) {
      console.log(i + "BUZZ");
    } else {
      console.log(i);
    }
  }
};

fizbuzz();

GCD of two numbers

				
					const gcd = (a, b) => {
  let smallnum = 0;
  let bignum = 0;

  a > b ? ([bignum, smallnum] = [a, b]) : ([bignum, smallnum] = [b, a]);

  for (let i = smallnum; i >= 1; i--) {
    if (bignum % i === 0 && smallnum % i === 0) {
      return i;
    }
  }
};
let c = gcd(15, 5);
console.log(c); 
//output:- 5

Max and Min Sum

				
					//QUESTION
//for 1 --> skip 1 -->Add other elements -->2+5+8+3=18
//for 2 --> skip 2 -->Add other elements -->1+5+8+3=17
//for 5 --> skip 5 -->Add other elements -->1+2+8+3=14
//for 8 --> skip 8 -->Add other elements -->1+2+5+3=11
//for 3 --> skip 3 -->Add other elements -->1+2+5+8=16
//Output Needed is as below
//Maximum Sum:-  18
//Mininum Sum:-  11


//SOLUTION
const number = [1, 2, 5, 8, 3];
const [minSum, maxSum] = [Math.min(...number), Math.max(...number)];
const finalSum = number.reduce((acc, curr) => acc + curr);
console.log("Maximum Sum:-", finalSum - minSum);
console.log("Mininum Sum:-", finalSum - maxSum);

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