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

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.

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

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.

Implement a function that adds a value to a set using Set.prototype.add().

Write a function that takes a date string as input and converts it to a UTC date string format.

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

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

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

Implement a function that removes leading and trailing whitespace from a string using the String.prototype.trim() method.

Convert a string to uppercase using String.prototype.toUpperCase();

Implement a function that returns the character at the specified index of a given string.

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

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

Write a function that returns the value of a given string using the String.prototype.valueOf() method.

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

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 various functionalities using Array.prototype.slice() method

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

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

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

Write a function that normalizes a string using String.prototype.normalize().

Create a function that takes a Date object and returns a JSON string of the date in ISO format.

Implement a function that takes a Date object as input and returns a formatted string

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

Create a function that returns the current year using Date's built-in getFullYear method

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

Create a function that takes in a string and checks if it starts with a given substring. Return a boolean indicating whether or not the string starts with the given substring.

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

Create a function that takes a year (YYYY) and returns the date object with its year set to the provided year.

Write a function that uses the Date.prototype.getDay() method to determine the day of the week for a given date object.

Implement the Array.prototype.with() method that returns a new array with the elements from the original array and the added elements.

Write a function that returns whether a given string ends with the provided suffix or not

Use Array.prototype.slice() to solve the following tasks.

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

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

Create a function to search for a substring in a given string using String.prototype.search() method.

Write a function that takes a string as input and splits it into an array of words using String.prototype.split(). Then, join the array back into a string using Array.prototype.join(). Finally, return the new string with a different delimiter separating each word.

Given two arrays, join them to create a new array.

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

Create a function that takes in an array of music tracks and returns an object with the count of each genre in the array

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.

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.

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

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

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

Implement a function that groups an array of objects by a given key and returns a new array of objects, where each object has a key and an array of objects that have that key.

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.

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.

Given a date, return the UTC date.

Write a function that takes a string and a substring as arguments, and finds the last occurrence of the substring in the string. If the substring 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 sets the UTC month of a given date object.

Create a function that receives a string and a regular expression pattern and returns an array of all the occurrences of the pattern in the string using String.prototype.matchAll().

Create a function that takes a string and a number and pads that string with a specified character until it reaches the given length.

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

Create a function that takes a string and a number as arguments, and pads the string on the right side with spaces until the string reaches the desired length.

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

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

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 returns true if a given string starts with a specific substring.

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 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.

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

Given an array of objects, group the objects based on a specific key and return a map object.

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

Write a function that converts a given string to its string representation using the toString() method.

Create a function that repeats a given string n times.

Write a function that returns an array of char codes from a string

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

Write a function that checks if a given string includes a specific substring. Use String.prototype.includes() method.

Create a function that takes in two parameters, a string and a substring, and checks if the string includes the substring. Return a boolean value.

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.

Write a function that converts a given string to uppercase

Create a function that replaces all instances of a given substring with another string within a larger string using String.prototype.replaceAll() method.

Create a function that takes a string as input and returns the string in all lowercase letters.

Implement a function that concatenates a given string 'n' times using the String.prototype.repeat() method.

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 determines if two strings are anagrams of each other.

Write a function that takes an integer n and returns the nth Fibonacci number using recursion.

Create a function that takes an array and removes a portion of the array, as specified by the arguments, and returns the removed portion.

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

Write a function that takes in a date and returns the seconds within the minute in UTC time.

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

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

Create a function that accepts a string and a target length. If the length of the string is less than the target length, pad the string with spaces at the beginning until the target length is reached. If the string length is greater than or equal to the target length, return the original string.

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

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

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.

Implement normalize method to format a string removing all the accents

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.

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

Replace all vowels in a string with a '-'.

Implement a function that takes a string as input and returns it in lower case.

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().

Create a function that returns the current minutes.