Suppose we have a JSON object like this −const obj = {    "LAPTOP": [{       "productId": "123"    }],    "DESKTOP": [{       "productId": "456"    }],    "MOUSE": [{       "productId": "789"    }, {       "productId": "012"    }], ... Read More

We are required to write a JavaScript function that takes in two numbers specifying a range. Our function should return a random prime number that falls in that rangeExampleThe code for this will be −const range = [100, 1000]; const getPrimes = (min, max) => {    const result = ... Read More

Suppose we have an array of true/false represented by 't'/'f' which we retrieved from some database like this −const arr = ['f', 't', 'f', 't', 't', 't', 'f', 'f', 't', 't', 't', 't', 't', 't', 'f', 't'];We are required to write a JavaScript function that takes in one such array. ... Read More

We are required to write a JavaScript function that takes in two strings, say str1 and str2. The function should then count and return the number of times str2 appears in str1'For example −count('this is a string', 'is') should return 2;ExampleThe code for this will be −const str1 = 'this ... Read More

Suppose we have an array of arrays that contains the marks of some students in some subjects like this −const arr = [ ["English", 52], ["Hindi", 154], ["Hindi", 241], ["Spanish", 10], ["French", 65], ["German", 98], ["Russian", 10] ];We are required to write a JavaScript function that takes in one such ... Read More

We are required to write a JavaScript function that takes in a number as one and the only argument. The function should then return a randomly generated string of the length specified by the argument.The character set to be used for the string generation should only contain uppercase and lowercase ... Read More

Cartesian ProductThe Cartesian product of two sets (arrays) A and B, denoted A × B, is the set (array) of all ordered pairs (a, b) where a is in A and b is in B.In simpler terms, a cartesian product of two arrays is a permutation of all possible arrays ... Read More

Suppose, we have an array of Strings that contains month-year combined strings like this −const arr = ["2009-feb", "2009-jan", "2010-mar", "2010-jan", "2011-jul", "2011-sep", "2011-jan", "2012-jan", "2012-dec", "2012-feb", "2013-may", "2013-jul", "2013-jun", "2014-jan", "2014-dec", "2014-may", "2015-may", "2015-jan", "2015-jun", "2016-jan", "2016-dec"];We are required to write a JavaScript function that takes in one such ... Read More

Let's say we have such an array −const arr = [A, A, B, B, C, C, D, E];We are required to create an algorithm so that it will find all the combinations that add up to the whole array, where none of the elements are repeated.Example combinations −[A, B, C, ... Read More

We are required to write a JavaScript function that takes in an array of literals as the first argument and a string as the second argument. Our function should return the count of the number of times that string (provided by second argument) appears anywhere in the array.ExampleThe code for ... Read More