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We are required to write a JavaScript function that takes in a number and returns the difference of the sums of the digits at even place and the digits odd placeExampleLet’s write the code −const num = 345336; const evenOddDifference = (num, res = 0, ind = 0) => { if(num){ if(ind % 2 === 0){ res += num % 10; }else{ res -= num % 10; }; }; return Math.abs(res); }; console.log(evenOddDifference(num));OutputFollowing is the output in the console −2
We have two arrays of objects like these −const blocks = [ { id: 1 }, { id: 2 }, { id: 3 }, { id: 4 }, ] const containers = [ { block: { id: 1 } }, { block: { id: 2 } }, { block: { id: 3 } }, ]We are required to write a function that checks each object of blocks array with the block key of each object of containers array and see if there exists any id in blocks array that is not present in ... Read More
We have an array of numbers like this −const arr = [-1, -2, -1, 0, -1, -2, -1, -2, -1, 0, 1, 0];Let’s say, we are required to write a JavaScript function that counts the consecutive groups of negative numbers in the array.Like here we have consecutive negatives from index 0 to 2 which forms one group and then from 4 to 8 forms the second groupSo, for this array, the function should return 2.ExampleLet’s write the code −const arr = [-1, -2, -1, 0, -1, -2, -1, -2, -1, 0, 1, 0]; const countNegativeGroup = arr => { ... Read More
The SQLWARN3 field in SQLCA is used to detect the condition wherein the number of the resultant columns is greater than the number of host variables given in the query of a COBOL-DB2 program. The SQLWARN3 is a 1 byte field, which contains the value ‘W’when there is mismatch in number of columns returned by the query and number of host variables used.We can enquire the status of SQLWARN3 using IF or EVALUATE statements as in the below exampleA010-CHECK-ORDER. EXEC SQL SELECT ORDER_DATE, ORDER_TOTAL INTO :ORDER-DATE, FROM ORDERS ... Read More
We are required to write a JavaScript function that computes the Factorial of a number n by making use of recursive approach.Here, we are finding the factorial recursion and creating a custom function recursiceFactorial() −const num = 9; const recursiceFactorial = (num, res = 1) => { if(num){ return recursiceFactorial(num-1, res * num); }; return res; };Now, we will call the function and pass the value to find recursion −console.log(recursiceFactorial(num)); console.log(recursiceFactorial(6)); console.log(recursiceFactorial(10));ExampleLet’s write the code for this function −const num = 9; const recursiceFactorial = (num, res = 1) => { if(num){ ... Read More
Let’s say, we have an array of objects like this −data = [ {"Age":26, "Level":8}, {"Age":37, "Level":9}, {"Age":32, "Level":5}, {"Age":31, "Level":11}, {"Age":null, "Level":15}, {"Age":null, "Level":17}, {"Age":null, "Level":45} ];We are required to write a JavaScript function that calculates the average level for all the objects that have a truthy value for age propertyLet’s write the code for this function −ExampleFollowing is the code −data = [ {"Age":26, "Level":8}, {"Age":37, "Level":9}, {"Age":32, "Level":5}, {"Age":31, "Level":11}, {"Age":null, "Level":15}, {"Age":null, "Level":17}, {"Age":null, "Level":45} ]; const findAverage = arr => { ... Read More
Two numbers are said to be co-primes if there exists no common prime factor amongst them (1 is not a prime number)For example −4 and 5 are co-primes 9 and 14 are co-primes 18 and 35 are co-primes 21 and 57 are not co-prime because they have 3 as the common prime factorWe are required to write a function that takes in two numbers and returns true if they are co-primes otherwise returns falseExampleLet’s write the code for this function −const areCoprimes = (num1, num2) => { const smaller = num1 > num2 ? num1 : num2; for(let ... Read More
We are required to write a JavaScript function that finds how many times a specific letter is appearing in the sentenceExampleLet’s write the code for this function −const string = 'This is just an example string for the program'; const countAppearances = (str, char) => { let count = 0; for(let i = 0; i < str.length; i++){ if(str[i] !== char){ // using continue to move to next iteration continue; }; // if we reached here it means that str[i] and char are same ... Read More
We are required to write a JavaScript function that takes in three numbers A, B and N, and finds the total number of N-digit numbers whose sum of digits at even positions and odd positions are divisible by A and B respectively.ExampleLet’s write the code for this function −const indexSum = (num, sumOdd = 0, sumEven = 0, index = 0) => { if(num){ if(index % 2 === 0){ sumEven += num % 10; }else{ sumOdd += num % 10; ... Read More
Let’s say, we are required to write a JavaScript function that takes in an array and a number n and rotates the array by n elementsFor example: If the input array is −const arr = [12, 6, 43, 5, 7, 2, 5];and number n is 3, Then the output should be −const output = [5, 7, 2, 5, 12, 6, 43];Let’s write the code for this function −ExampleFollowing is the code −// rotation const arr = [12, 6, 43, 5, 7, 2, 5]; const rotateByOne = arr => { for(let i = 0; i < arr.length-1; i++){ ... Read More