JavaScript asked interview code

function getRandomNumber(min, max){
    return Math.floor(Math.random() *(max-min +1)) + min;
}

console.log(getRandomNumber(1,6));

// another way
const random1 =((Math.random()*10)+1);
const random2 =Math.floor(((Math.random()*7)));
console.log(random1)  // print 1-6
console.log(random2) // print 1-6

const id = Math.random().toString().split(".")[1];
const id1 =crypto.randomUUID();
const revId = id.split("").reverse().join("");
const revId1 = id1.split("").reverse().join("");

console.log(id," | ",revId)  // 6024356929627508  |  8057269296534206
console.log(id1, " | ",revId1) // 83fdaf7b-ec0b-49f3-b161-0f5c78c81d41  |  14d18c87c5f0-161b-3f94-b0ce-b7fadf38


const  num =12345;
const r =Number(num.toString().split("").reverse().join(""));
console.log(num, "|||" ,r)  // 12345 ||| 54321

let str1 ="bappasaha"
const reverse =str1.split("").reverse().join("");
console.log(str1, "<->",reverse)  // bappasaha <-> ahasappab


let str ="b-a-p-p-a";
console.log(str.split("-")) ;
console.log(str.split("-").join(","));

const std = ["bappa","kaoa","dafda","apple"];
console.log(std.sort());

const rollNumebers = [40, 100, 1, 5, 25, 10];

function myFuc(a,b){
    return a-b;
};
console.log(rollNumebers.sort(myFuc)) // [ 1, 5, 10, 25, 40, 100 ]


//shortcut
const rollNumebers = [40, 100, 1, 5, 25, 10];
console.log(rollNumebers.sort((a,b)=>{return a-b})) // assending
console.log(rollNumebers.sort((a,b)=>{return b-a})) //decending

// const arr = ["bappa", "appa", "cappa", "bappa"];

// const item = arr.forEach((item, index, arr) => console.log("items:",item));
// const d = arr.filter((item, index) => console.log(arr.indexOf(item) !==index));
// const i = arr.filter((item, index) => console.log(arr.indexOf(index)));


const numbers =[1,2,4,5,6,6,1,5,76,,89,76,90,25];

const duplicate =numbers.filter((value,index, array)=>{
    return array.indexOf(value)!==index;
});

console.log(duplicate);


const arr = ["bappa", "appa", "cappa", "bappa"];
const duplicates = arr.filter((item, index) => arr.indexOf(item) !== index);
console.log(duplicates); // Output: ["bappa"]

const numbers1 =[1,2,4,5,6,6,1,5,76,,89,76,90,25];

const unique =numbers.filter((value,index, array)=>{
    return array.indexOf(value)===index;
});
console.log('---');
console.log(unique);

const arr = ["bappa", "appa", "cappa", "bappa"];
const uniqueItems = arr.filter((item, index) => arr.indexOf(item) === arr.lastIndexOf(item));
console.log(uniqueItems); // Output: ["appa", "cappa"]

const vowels =["a","e","i","o","u","A","E","I","O","U"];

const countVowel=(sentence)=>{
    let count =0;
    const letters =Array.from(sentence);
    letters.forEach((letter)=>{
        if(vowels.includes(letter)){
            count++;
        }
    })
    return count;

};

console.log(countVowel("I love Bangladesh"));

function isLeapyear(year){
    if(year%400 ===0 || ((year %4 ===0) && (year % 100 !==0))){
        console.log(`${year} is Leap year`);
    }
    else 
        console.log('not');
};

isLeapyear(2020);

const sentence ="There is a dreamy boy nameed Bappa.There is a dreamy boy nameed bappa.There is a dreamy boy nameed bappa.There is a dreamy boy."

const matches =sentence.match(/bappa/ig);
const occurances =matches? matches.length : 0;
console.log(matches, occurances)


let position =sentence.search(/bappa/i);
position= position>=0 ? position : "not found";
console.log(position) 

function linearSearch(arr,value){

    const length =arr.length;
    for(let i =0; i<length; i++){
        if(arr[i]===value){
            return i;
        }
    }
    return "not found";
}

console.log(linearSearch(['a','b','c','d','c'], 'c')); 

function longestString(names){
    let longestWord ='';
    for(n of names){
        if(n.length > longestWord.length){
            longestWord =n;
        }
    }
    return [longestWord, names.indexOf(longestWord)]

}

const nameArray=['Bappa saha', 'learn with bappa','akash','akash mohajoon','dad'];

console.log(longestString(nameArray));

function fooBar(number){

    for (let i =1; i<=number; i++){
        if(i%3===0 && i%5===0){
            console.log(`${i} is fooBar number`);
        }
        else if(i%3===0){
            console.log(`${i} is divied by 3`);
        }
        else if(i%5 ===0){
            console.log(`${i} is divied by 5`)
        }
        else{
            console.log(`${i} is not  divied by 3 or 5`);
        }
    }
}

console.log(fooBar(100))

const mixedArr =[
    "bws",
    undefined,
    "learn with bappa",
    0,
    false,
    "",
    "apple",
    null,
    40,
    "k",
    true,
    "Thanks all",
    NaN
];


const trueArray =mixedArr.filter(element=>{
    if(element){
        return true;
    }else{
        return false
    }
})
console.table(trueArray) 


// another way

const  trueArray1 =mixedArr.filter(Boolean)
console.table(trueArray1)

const obj ={

    a:"bws",
    b:undefined,
    c:"learn with bappa",
    d:0,
    e:false,
    f:"",
    g:"apple",
    h:null,
    i:40,
    j:"k",
    k:true,
    l:"Thanks all",
    m:NaN
};

const trutyObj =function(obj){
    for(let i in obj){
        if(!obj[i]){
            delete obj[i];
        }
    }
    return obj;
}

console.log(trutyObj(obj))