We are required to write a JavaScript function that takes in an array of Number and returns the averages of its elements excluding the smallest and largest Number.Let’s write the code for this function −Following is the code −const arr = [1, 4, 5, 3, 5, 6, 12, 5, 65, 3, 2, 65, 9]; const findExcludedAverage = arr => {    const creds = arr.reduce((acc, val) => {       let { min, max, sum } = acc;       sum += val;       if(val > max){          max = val;     ... Read More

We are required to write a JavaScript function that takes in two arrays of literals and checks the corresponding elements of the array and it should return true if all the corresponding elements of the array are equal otherwise it should return false.Let’s write the code for this function −ExampleFollowing is the code −const arr1 = [1, 4, 5, 3, 5, 6]; const arr2 = [1, 4, 5, 2, 5, 6]; const areEqual = (first, second) => {    if(first.length !== second.length){       return false;    };    for(let i = 0; i < first.length; i++){     ... Read More

We are required to write a JavaScript function that takes in a string and a number n (such that n exactly divides the length of string). We need to return an array of string of length n containing n equal parts of the string.Let’s write the code for this function −Exampleconst str = 'this is a sample string'; const num = 5; const divideEqual = (str, num) => {    const len = str.length / num;    const creds = str.split("").reduce((acc, val) => {       let { res, currInd } = acc;       if(!res[currInd] || res[currInd].length ... Read More

We are required to write a JavaScript function that takes in a string and returns the character from the string that appears for the second most number of times.Let’s say the following is our array −const arr = [1, 34, 4, 3, 2, 1, 4, 6, 4, 6, 5, 3, 6, 6];So, the frequent character appearing is −6But we want the output to be the second most frequent character i.e.4Let’s write the code for this function −Exampleconst arr = [1, 34, 4, 3, 2, 1, 4, 6, 4, 6, 5, 3, 6, 6]; const secondMostFrequent = arr => {   ... Read More

We are required to write a JavaScript function that takes in an array of nested arrays of Numbers and some false values (including 0) and some strings as wel. the function should return the product of number values present in the nested array.If the array contains some 0s, we should ignore them as well. Let’s write the code for this function −Exampleconst arr = [1, 5, 2, null, [       2, 5, null, undefined, false, 5, [          1, 3, false, 0, 2       ], 4, 2, false    ], 4, 6, 0 ... Read More

We are required to write a JavaScript function that takes in two strings and returns the count of the number of times the first string appears in the second stringLet’s say our string is −const main = 'This is the is main is string';We have to find the appearance of the below string in the above “main” string −const sub = 'is';Let’s write the code for this function −Exampleconst main = 'This is the is main is string'; const sub = 'is'; const countAppearances = (main, sub) => {    const regex = new RegExp(sub, "g");    let count = ... Read More

Let’s say, we have two arrays of numbers −const arr1 = [12, 54, 2, 4, 6, 34, 3]; const arr2 = [54, 2, 5, 12, 4, 1, 3, 34];We are required to write a JavaScript function that takes in two such arrays and returns the element from arrays that are not common to both.Let’s write the code for this function −ExampleFollowing is the code −const arr1 = [12, 54, 2, 4, 6, 34, 3]; const arr2 = [54, 2, 5, 12, 4, 1, 3, 34]; const unCommonArray = (first, second) => {    const res = [];    for(let i ... Read More

A Pronic number is a number which is the product of two consecutive integers, that is, a number of the form n(n + 1).We are required to write a JavaScript function that takes in a number and returns true if it is a Pronic number otherwise returns falseLet’s write the code for this function −Exampleconst num = 90; const isPronic = num => {    let nearestSqrt = Math.floor(Math.sqrt(num)) - 1;    while(nearestSqrt * (nearestSqrt + 1)

We are required to write a JavaScript function that takes in an array of positive as well as negative Numbers and changes the positive numbers to corresponding negative numbers and the negative numbers to corresponding positive numbers in place.Let’s write the code for this function −ExampleFollowing is the code −const arr = [12, 5, 3, -1, 54, -43, -2, 34, -1, 4, -4]; const changeSign = arr => {    arr.forEach((el, ind) => {       arr[ind] *= -1;    }); }; changeSign(arr); console.log(arr);OutputFollowing is the output in the console −[    -12, -5,  -3, 1, -54,    43,  2, -34, 1,  -4,    4 ]

Collinear PointsThree or more points that lie on the same straight line are called collinear points.And three points lie on the same if the slope of all three pairs of lines formed by them is equal.Consider, for example, three arbitrary points A, B and C on a 2-D plane, they will be collinear if −slope of AB = slope of BC = slope of acceptsSlope of a line −The slope of a line is generally given by the tangent of the angle it makes with the positive direction of x-axis.Alternatively, if we have two points that lie on the line, ... Read More