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script.js
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script.js
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//!1.Do the below programs in anonymous function:
//a.Print odd numbers in an array:
var a = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15];
var b = function () {
var c = [];
for (var i = 0; i < a.length; i++) {
if (a[i] % 2 != 0) {
c.push(a[i]);
}
}
console.log(c);
};
b();
//b.Convert all the strings to title caps in a string array:
a = function (str) {
var res = str.toLowerCase().split(" ");
for (var i = 0; i < res.length; i++) {
res[i] = res[i][0].toUpperCase() + res[i].slice(1);
}
console.log(res.join(" "));
return res;
};
a("my favourite place is kerala");
//c.Sum of all numbers in an array
a = [1, 2, 3, 4, 5, 6, 7, 8, 9];
b = function () {
var sum = 0;
for (var i = 0; i < a.length; i++) {
sum = sum + a[i];
}
return sum;
};
console.log(b());
//d.Return all the prime numbers in an array
let array = [1, 2, 3, 4, 5, 6, 7, 8, 9];
let primeNumbers = array.filter(function (element) {
if (element <= 1)
return false;
for (let i = 2; i <= Math.sqrt(element); i++) {
if (element % i === 0) {
return false;
}
}
return true;
});
console.log(primeNumbers);
//e.Return all the palindromes in an array
let arr = ["madam", "hello","data", "level", "world","car", "racecar", "radar"];
let palindromes = arr.filter(function (element) {
let str = element.toLowerCase();
return str === str.split("").reverse().join("");
});
console.log(palindromes);
//f.Return median of two sorted arrays of the same size
let findMedianSortedArrays = function(nums1, nums2) {
let mergedArray = [...nums1, ...nums2].sort((a, b) => a - b);
let length = mergedArray.length;
let mid = Math.floor(length / 2);
if (length % 2 === 0) {
return (mergedArray[mid - 1] + mergedArray[mid]) / 2;
}
else
{
return mergedArray[mid];
}
};
let nums1 = [1, 3, 5];
let nums2 = [2, 4, 6];
console.log(findMedianSortedArrays(nums1, nums2));
//g.Remove duplicates from an array
let array1 = [1, 2, 2, 3, 4, 4, 5];
let uniqueArray = function(arr) {
return arr.filter(function(item, index)
{
return arr.indexOf(item) === index;
});
}(array1);
console.log(uniqueArray);
//h.Rotate an array by k times
let array2 = [1, 2, 3, 4, 5];
let k = 3;
let rotatedArray = function(arr, k) {
k = k % arr.length;
return arr.slice(-k).concat(arr.slice(0, arr.length - k));
}(array2, k);
console.log(rotatedArray);
//!Do the below programs in IIFE function:
//a.Print odd numbers in an array
let request = [1, 2, 3, 4, 5, 6, 7, 8, 9];
let oddNumberArray = (function(arr) {
let oddNumbers = [];
arr.forEach(function(element) {
if (element % 2 !== 0) {
oddNumbers.push(element);
}
});
return oddNumbers;
})(request);
console.log(oddNumberArray);
//b.Convert all the strings to title caps in a string array
let stringArray = ["hello world", "good morning", "have a nice day"];
let titleCapsArray = (function(arr) {
let capitalize = function(word) {
return word.charAt(0).toUpperCase() + word.slice(1).toLowerCase();
};
return arr.map(function(str) {
return str.split(' ').map(capitalize).join(' ');
});
})(stringArray);
console.log(titleCapsArray);
//c.Convert all the strings to title caps in a string array
let car = [1, 2, 3, 4, 5];
let sum = (function(arr) {
let total = 0;
for (let i = 0; i < arr.length; i++) {
total += arr[i];
}
return total;
})(car);
console.log(sum);
//d.Return all the prime numbers in an array
let response = [1, 2, 3, 4, 5, 6, 7, 8, 9];
let primeNumber = (function(arr) {
let isPrime = function(num) {
if (num <= 1) {
return false;
}
for (let i = 2; i <= Math.sqrt(num); i++) {
if (num % i === 0) {
return false;
}
}
return true;
};
return arr.filter(function(element) {
return isPrime(element);
});
})(response);
console.log(primeNumber);
//e.Return all the palindromes in an array
let repeat = ["madam", "hello", "level", "world", "racecar", "radar"];
(function(arr) {
let palindromes = arr.filter(function(element) {
let str = element.toLowerCase();
return str === str.split('').reverse().join('');
});
console.log(palindromes);
})(repeat);
//f.Return median of two sorted arrays of the same size.
let num1 = [1, 3, 5];
let num2 = [2, 4, 6];
let median = (function(arr1, arr2) {
let mergedArray = arr1.concat(arr2).sort((a, b) => a - b);
let length = mergedArray.length;
let mid = Math.floor(length / 2);
if (length % 2 === 0) {
return (mergedArray[mid - 1] + mergedArray[mid]) / 2;
} else {
return mergedArray[mid];
}
})(num1, num2);
console.log(median);
//g.Remove duplicates from an array
let duplicates = [1, 2, 2, 3, 4, 4, 5];
let uniqueArr = (function(arr) {
return arr.filter(function(item, index) {
return arr.indexOf(item) === index;
});
})(duplicates);
console.log(uniqueArr);
//h.Rotate an array by k times
let rotatedArrays = [1, 2, 3, 4, 5];
let n= 3;
let rotations = (function(arr, rotations) {
rotations = rotations % arr.length;
return arr.slice(-rotations).concat(arr.slice(0, arr.length - rotations));
})(array, k);
console.log(rotatedArray);
//!2.Do the below programs in arrow functions.
//a.Print odd numbers in an array
let array5 = [1, 2, 3, 4, 5, 6, 7, 8, 9];
const getOddNumbers = (arr) => {
return arr.filter(element => element % 2 !== 0);
};
let oddNumbersArray = getOddNumbers(array5);
console.log(oddNumbersArray);
//b.Convert all the strings to title caps in a string array
let string = ["hello" , "world", "morning"];
const convertToTitleCaps = (arr) => {
return arr.map((str) => {
return str.split(' ').map((word) => {
return word.charAt(0).toUpperCase() + word.slice(1);
}).join(' ');
});
};
let titleCapArray = convertToTitleCaps(string);
console.log(titleCapArray);
//c.Sum of all numbers in an array
let sumarr = [1, 2, 3, 4, 5];
const sumOfNumbers = arr => arr.reduce((acc, current) => acc + current, 0);
let sum1 = sumOfNumbers(sumarr);
console.log(sum1);
//d.Return all the prime numbers in an array
let arrays = [1, 2, 3, 4, 5, 6, 7, 8, 9];
const isPrime = num => {
if (num <= 1) return false;
if (num === 2) return true;
if (num % 2 === 0) return false;
for (let i = 3; i <= Math.sqrt(num); i += 2) {
if (num % i === 0) return false;
}
return true;
};
const getPrimeNumbers = arr => arr.filter(num => isPrime(num));
let primeNumbersArray = getPrimeNumbers(arrays);
console.log(primeNumbersArray);
//e.Return all the palindromes in an array
let array8 = ["madam", "hello", "level", "radar", "world"];
const isPalindrome = str => {
const reversed = str.split('').reverse().join('');
return str === reversed;
};
const getPalindromes = arr => arr.filter(str => isPalindrome(str));
let palindromeArray = getPalindromes(array8);
console.log(palindromeArray);