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arrow.js
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arrow.js
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//ARROW FUNCTION
//1.Print odd numbers in an array
let arr = [1,2,3,4,5,6,7,8,9,10,11,12];
arr.forEach((item) =>{
if (item % 2 !== 0) {
console.log(item);
}
});
//2.Convert all the strings to title caps in a string array
let titleCase = (str)=> {
let sentence = str.toLowerCase().split(' ');
for(let i=0;i< sentence.length;i++){
sentence[i] = sentence[i][0].toUpperCase() + sentence[i].slice(1);
}
return sentence.join(' ');
}
console.log(titleCase("converting string to titlecase"));
//3.Sum of all numbers in an array
let arr1 = [3, 6, 1, 5, 8];
let s =0;
let sum = (arr) => {
arr.map(e => {
s += e;
});
return s;
}
console.log(sum(arr1));
//4.Return all the prime numbers in an array
let arr2 = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20];
let isPrime = (num) => {
for (let i = 2; num > i; i++) {
if (num % i == 0) {
return false;
}
}
return num > 1;
}
console.log(arr2.filter(isPrime));
//5.Return all the palindromes in an array
let arr3 = ["level", "10" , "madam"]
let palindrome=(arr)=>{
let ans=[];
for(let i=0;i<arr3.length;i++){
let x=arr3[i];
let a=true
for(let j=0;j<x.length/2;j++){
if(x[j]!==x[x.length-1-j]){
a=false
}
}
if(a==true){
ans.push(x)
}
}
return ans
}
console.log(palindrome(arr3))