Javascript for Logical Thinking and Problem Solving

Master swapping two variables in JavaScript using a temporary variable Z, with x and y and a before-and-after demonstration.

Count even numbers in a given integer with a JavaScript for loop and modulus operator, using a simple if condition to increment and return the final count.

Create a JavaScript function convert that takes temperature, from unit and to unit (C, K, F) and handles six conversions with if statements, formatting to two decimals.

Learn to write a JavaScript program that finds the largest of three integers and extends it to accept any number of inputs using the spread operator and Math.max.

Write a JavaScript function difference to compute the difference between a given number and 13, doubling the result when the input exceeds 13, and returning 13 minus the number otherwise.

Learn to write a JavaScript function that checks if a number is within 20 of 100 or 400 using Math.abs and a simple or condition.

Learn how to write a JavaScript function that checks if two integers are one positive and one negative, using if statements, logical or, and concise boolean returns.

Learn to write a JavaScript function that checks whether a positive number is a multiple of 3 or 7, using modulo and arrow functions.

Learn to write a JavaScript function that sums two integers and returns 65 when the sum lies between 50 and 80, otherwise returns 80, with code logic and tests.

Master generating random numbers in JavaScript with Math.random, scale values to a range, adjust with addition, subtraction, and Math.floor for integers.

Learn to write a JavaScript program that checks a string and prefixes it with pi when it doesn't begin with pi, returning the original string if it does.

learn how to remove a character at a given position in javascript strings using substring, by combining the start and end parts to produce the modified string.

Learn how to check if a string starts with a given prefix in JavaScript using the startsWith method, with practical examples returning true or false.

Learn how to reverse a string in JavaScript by looping from string length minus one to zero and appending characters to a result initialized as an empty string.

Capitalize the first letter of each word in a string using a JavaScript program. Split by spaces, loop through words, uppercase the first letter, and rebuild.

Implement fizzbuzz in JavaScript by iterating from 1 to 100, printing fizz for multiples of three, bars for multiples of five, and Fizzbuzz for multiples of both.

Write a JavaScript function to reverse a number by converting it to a string, splitting into characters, reversing the array, joining back, and converting to a number.

Write a JavaScript function that accepts a string, splits it by spaces into words, iterates to compare word lengths, and returns the longest word as the result.

Learn to implement a JavaScript function that tests whether a number is prime by checking divisibility from two up to n-1 and handling 0 and 1 as non-prime.

Write a JavaScript function that takes an array of numbers, sorts it, and returns the second lowest and second greatest values as an array.

Develop a JavaScript function to compute the factors of a positive integer by looping, testing divisibility, and returning a result array.

Write a JavaScript recursive function that sums from one to n, using a base case of zero and the expression n plus the recursive call of n minus one.

Learn to implement a JavaScript recursive power function for n to the power m, with a base case m equals zero returning one and recursive multiplication by n.

Learn to implement a recursive factorial in JavaScript, using a base case at one and n times factorial(n-1) to compute 5! = 120.

Practice recursion in JavaScript by building a sum function that adds the first element of the array to the sum of the rest, with cases for single and empty arrays.

Explore bubble sort, a simple algorithm that sorts numbers by repeatedly swapping adjacent out of order elements, using loops and a temporary variable to swap until no further swaps occur.

Explore how to find the maximum number in an array that contains numbers and nested arrays by using recursion, a for loop, and a non-array check with array.isArray.

Explore recursive JavaScript techniques to compute string length without using the length property and array length, using substring for strings and a base case for empty inputs.

Implement a recursive flat method to flatten nested arrays into a single array. Handle elements and arrays, use recursion and the spread operator to produce a flat result.

Learn how to find the maximum in a deeply nested array by flattening to infinity and using the spread to pass elements to Math.max, avoiding recursion.

Learn to remove and replace items in an array using splice, identifying start index, removing elements, and inserting new values to reshape the array.

Create a JavaScript function to return the first element or first n elements of an array using slice, handling undefined or negative n and empty arrays.

Learn to find the most frequent item in an array by counting occurrences with nested loops and tracking the top frequency and value.

Learn to implement a JavaScript includes check by using Array.includes and a manual loop to return true or false when a value is found in an array.

create a JavaScript function named print that takes an array of arrays and uses nested for loops to print each row and its elements, logging array[i][j] to reveal row-wise structure.

Learn to compare arrays in JavaScript using JSON.stringify to check equality. Extend the function to handle any number of arrays and return true if all are equal.

Create a function that takes two arrays, computes the sum and product of corresponding elements, treats missing values as zero, and returns an object with sum and product.

Learn two JavaScript methods to remove duplicates from an integer array: building a result with includes checks and using a set for unique elements, then returning the array.

Compute the cart total by summing price times quantity for each item with a JavaScript function. Use array reduce with an accumulator, starting at zero, to accumulate the total.

Add a key value pair to an object using bracket notation when the key is a variable, by assigning obj[key] = value and returning the object.

Delete a property from a JavaScript object with the delete operator, using dot or bracket notation for dynamic properties, and print the object before and after to verify the change.

Count an object's properties in JavaScript by using Object.keys or Object.values, since dot length works only on arrays, and log the length from the keys or values arrays.

Write a JavaScript function that converts an object into an array of key-value pair arrays using a for-in loop. Push each pair as [key, obj[key]] and return the resulting list.

Learn to write a JavaScript function that checks whether an object contains a given property using a for-in loop, returning true when the property matches and false otherwise.