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Write a function that takes an array and a value and pushes the value to the end of the array using Array.prototype.push().

Implement a function that returns true if a given string starts with a specific substring.

Create a function that receives a Date object and returns the milliseconds that have elapsed since the start of the day.

Write a function that uses the String.prototype.trimStart() method to remove any whitespace characters from the beginning of a given string.

Create a function that returns the month of a Date object in UTC time zone.

Write a function that checks if an element is present in an array using Array.prototype.includes() method.

Write a function that returns the nth number in the Fibonacci sequence using recursion.

Write a function that checks whether a given string ends with the specified suffix or not.

Implement an algorithm that manages the overbooking of an airline flight.

Create a function that returns the current date as a number (1-31).

Create a function that counts the number of seconds in a given timestamp

Combine two arrays into a single array using the Array.prototype.concat() method

Implement normalize method to format a string removing all the accents

Write a JavaScript function to find the index of an item in an array using Array.prototype.findIndex().

Write a function that takes two arrays as arguments and concatenates them into a new array using the Array.prototype.concat() method.

Create a function that concatenates two strings using the String.prototype.concat() method. The function should take two string parameters and return the concatenated string.

Create a function that sorts an array of strings in alphabetical order using String.prototype.localeCompare()

In this kata, you will be working with the String.prototype.toLocaleUpperCase() method to convert a string to uppercase according to the user's locale.

Sort an array of words based on their alphabetical order using String.prototype.localeCompare() method.

Write a function that takes a string and returns all its substrings of length 3 or greater. You must use String.prototype.slice() to achieve this.

Create a function that takes an array as input and returns a new array with the elements in reversed order.

Write a function that takes a string and returns an array of code points for each character in the string using String.prototype.codePointAt() method.

Write a function that takes in a string and uses precision cutting to remove all occurrences of the letter 'e'. Return the resulting string.

Write a function that checks if a given string has a unicode character code point greater than or equal to 128. Use the String.prototype.codePointAt() method.

Write a function that takes an array and a value as arguments and returns the index of the last occurrence of that value in the array using Array.prototype.lastIndexOf(). If the value is not found, return -1.

Write a function that takes a string and a search term and returns the index of the first occurrence of the search term in the given string. If the search term is not present in the string, return -1.

Create a function that takes in a string and uses String.prototype.match() to find all occurrences of a pattern within the string.

Create a function that greets the user depending on the current hour of the day.

Write a function that takes a Date object and returns the date formatted in the user's local format using the toLocaleDateString() method.

Implement a function that sets the milliseconds of a given date object to a specified value.

Write a function that replaces the first occurrence of a specific string in a given string.

Write a function that takes a string and a regular expression and returns an array of all the substrings in the string that match the regular expression.

Create a function that removes white space at the end of a given string using String.prototype.trimEnd().

Write a function that accepts a date object and a number of seconds (0 - 59) and returns a new date object with the seconds set to the provided value. The operation should be done using the setUTCSeconds() method.

Create a function that takes a start time and an event duration and returns the end time of the event, using the Date.prototype.setHours() method to set the hours of the start time.

Create a function that returns the current minutes.

Create a function that takes two strings as input and concatenates them using the String.prototype.concat() method.

Implement a function that returns the current month from Date object using Date.prototype.getMonth()

Create a function that uses the copyWithin method to replace specified elements within an array.

Create a program that classifies music genres based on certain audio features

Create a function that takes two parameters: a string and a regular expression. The function should return an array of all matches found in the string using the regular expression.

Implement a function that takes an array of strings and a search string, and returns a new array containing only the strings that includes the search string using String.prototype.includes() method.

A kata that requires the student to use String.prototype.split() to split a given string into substrings and perform a specified operation on them.

Implement a function that uses String.prototype.trimEnd() to trim whitespace at the end of a string.

Create a function that uses the String.prototype.replaceAll() method to replace all occurrences of a given substring within a string.

Given a string, return a new string that is a substring of the original string. The substring should start at a specified index and continue until the end of the original string.

Implement a function that groups the elements of an array based on a given predicate function.

Create a function that checks if a given string ends with a specified suffix.

Write a function that takes a string and regular expression as inputs, and returns an array of all matches found using the String.matchAll() method.

Create a function that replaces all occurrences of a substring with a new string.

Convert an array to a string with comma-separated values. The input array can contain numbers, strings, objects, or arrays.

Create a function that takes an array of numbers and returns the index of a given element. Use Array.prototype.findIndex() to implement the function.

Converts a given date to a time string

Fill arrays with specific values using Array.prototype.fill()

This kata focuses on using String.prototype.indexOf() method.

Write a function that accepts a string and a number as arguments, then returns the character at that position in the string. Use String.prototype.charAt() for this exercise.

Create a Stock Advisor that recommends which stocks to buy based on certain parameters.

Create a function that will return an array in a localized way using the toLocaleString method.

Write a function that joins two arrays into a single string using Array.prototype.join() method.

Create a function that takes a date and a year as arguments and returns a new date with the year set to the specified value using Date.prototype.setFullYear().

Given an array of numbers and a start index, remove a certain number of elements from the array and replace them with new elements.

Write a function that extracts a character from a string given an index using String.prototype.charAt()

Write a function that can take in a list of numbers and precision cut them to a desired number of decimal places.

Implement a function that removes all unused items in a Set collection

Create a function that uses the String.prototype.lastIndexOf() method to find the index of the last occurrence of a specified substring in a given string.

Implement a function that takes a Date object and a number representing minutes and sets the UTC minutes of the Date object to the provided value. The function should return the updated Date object.

Create a function that takes a string and returns an array of the char codes for each character in the string

Create a function that uses Array.prototype.every() to check if all the elements in an array meet a certain condition.

Given an array of person objects, sort them alphabetically by their last name using String.prototype.localeCompare().

Create a function that searches for the last index of a substring in an array using Array.prototype.lastIndexOf().

Convert a string to an array of Unicode code points using String.prototype.codePointAt() method.

Create a function that sets the UTC month of a given date object.

Create a function that receives a string and normalizes it using the String.prototype.normalize() method. Apply the NFC normalization form.

Create a function that takes a string as input and returns the same string in uppercase letters using the `toString()` method of the String object.

Given an array of numbers, use reduce method to obtain a single value that represents the sum of all numbers in the array.

Write a function that takes a string and returns it in lowercase using the toLocaleLowerCase() method.

Write a function that takes a Date object and returns a string representing the time portion of the date in the current time zone using the toLocaleTimeString() method. The function should also take an optional argument specifying the locale to use.

Implement a function that replaces all instances of a specified substring in a given string.

Implement equations using the Array.of() method to create arrays.

Create an Inventory Management System that allows users to add, remove and update items in the inventory.

Create a function that takes an array and reverse its order in place.

Write a function that concatenates two strings using the String.prototype.concat() method.

Write a function that returns a substring of a given string, based on the start and end index provided

Write a function that checks if a given variable is an array. If it is an array, return true, otherwise return false.

Create a function that accepts a Set and a value to remove, and returns the updated Set after deleting the value.

Create a function that takes an array and a value as arguments and adds the value to the beginning of the array using the unshift() method.

Write a function that finds the last index of a given element in an array using the Array.prototype.findLastIndex method.

Create a function that normalizes a string using String.prototype.normalize method.

Write a function that checks if every element in an array satisfies a given condition.

Write a function that loops through a Set using Set.prototype.forEach() method and returns an array containing the results of applying the provided function to each element.

Create a function that takes in a string with extra white space at the beginning and end of the string, and returns a new string with that white space removed. Use String.prototype.trim().

Write a function that takes a Set object as a parameter and returns an array of keys using Set.prototype.keys().

Create a function that takes in a string and a length and returns a new string with the original string padded with leading spaces if it is shorter than the provided length.

Write a function that takes a string and returns an array of matched patterns using String.prototype.matchAll().

Create a function that uses Array.prototype.findLast() to find the last element in an array that matches a given condition. Return the element if it exists or null if it does not.

Complete the functions to find the index of an element in an array using Array.prototype.indexOf().

Write a function that takes a date object and a number representing the desired month, and sets the month of the date to the given month.

Create a function that receives a string and a number as parameters. The function should return the string repeated `n` times, where n is the number passed as parameter.

Implement a function that takes in a Set and returns an array of entries

Create a function that takes a date and a year and sets the date's UTC full year to the provided year.