Javascript-exercises-beginners

This a repository for JavaScript questions to get you comfortable answering interview questions for junior role

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Task 1

Implement a pangram check function.

Definition:

A pangram or holoalphabetic sentence is a sentence using every letter of a given alphabet at least once.Read more

example: "The quick brown fox jumps over the lazy dog"

  console.log(isPangram("The quick brown fox jumps over the lazy dog")) // true
  console.log(isPangram("This sentence is not a pangram")) // false

Hints:

1. Spaces and Capitalisation in the sentences
2. .split() .join() .sort() .toLowerCase()
3. const alphabet= 'abcdefghijklmnopqrstuvwxyz'

Task 2

Implement a palindrom check function

Definition:

A palindrom is a word, number, phrase, or other sequence of characters which reads the same backward as forward Read more

example: madam or racecar

  console.log(isPalindrome("racecar") //true
  console.log(isPalindrome("avocado") //false

Hints

1. This can be a single word or a sentence, they may contain capital letters and lowercases
2. .split() .reverse() .toLowerCase()

Task 3

** for loop** comprehension This is to test your understanding of for loop

  //Given array numbers =[1,2,3,4,5,6,7,8,9]
  //Using only for loop print number from the last number to the first in the array
  //Should print this in the console 9 8 7 6 5 4 3 2 1

Task 4

High order functions

using every check if evry person in the array is over age( 18 and above) or use some to check if the array contains anyone under age

using filter go through the array of random people and return people whose age is over 18 only and store them in a const variable overAge

using map change every person.drinks property in overAge to true and console log to check your answer

using findIndex return the index of the oldest person and their name and age

using reduce Calculate the average age of the array elements

using forEach print everyone's name and city they are from

  let people=[
    {
        name: "Didier",
        age: 26,
        city: "Sydney",
        drinks: false
    },
    {
        name: "Hermes",
        age: 27,
        city: "Napoli",
        drinks: false
    },
    {
        name: "Abi",
        age: 30,
        city: "Orange",
        drinks: false
    
    },
    {
        name: "Mathis",
        age:5,
        city: "Los Angeles",
        drinks: false
    },
    {
        name: "kai",
        age: 17,
        city: "Atlantis",
        drinks: false
    },
    {
        name: "Jack",
        age: 40,
        city: "Liverpool",
        drinks: false
    }
]

Task 5

Implement isIsogram function

Definition

A isIsogram is a word, phrase, or sentence in which no letter of the alphabet occurs more than once. The terms Heterogram and nonpattern word have also been used to mean the same thin Read more

example: ambidextrous

  console.log(isIsogram("ambidextrous") // true
  console.log(isIsogram("didier") // false

Hints

1. This can be a single word or a sentence, they may contain capital letters and lowercases
2. .split() .toLowerCase() set

Task 6

Implement isLeapYear function

Definition

1. Leap Years are any year that can be exactly divided by 4 (such as 2016, 2020, 2024, etc)
2. except if it can be exactly divided by 100, then it isn't (such as 2100, 2200, etc)
3. except if it can be exactly divided by 400, then it is (such as 2000, 2400) read more

    console.log(isLeapYear("2020")); // true
    console.log(isLeapYear("2018")); // false
    console.log(isLeapYear("1700")); // false
    console.log(isLeapYear("1600")); // true

to be continued, I will keep updating this reo for better and more challenging questions

everyone is welcome to contribute