Instead the new variable is just a reference, or alias, to the original array; that is, the original array's name and the new variable name are just two names for the exact same object (and so will always evaluate as strictly equivalent). let days = [ "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" ]; let day = [ "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" ]; Thanks guys! Certain parts of this website require Javascript to work. How to sort an array of integers correctly. The old position at [6][4] is made blank. Display Month of Year using Java Calendar. Level up your programming skills with exercises across 52 languages, and insightful discussion with our dedicated team of welcoming mentors. "06": "Jun", Connect and share knowledge within a single location that is structured and easy to search. This example uses the splice() method to remove the last 3 items from the fruits array. You can make a tax-deductible donation here. This example uses the unshift() method to add, at index 0, a new item to the fruits array making it the new first item in the array. The first move is made by copying the 'p' in board[6][4] to board[4][4]. months.js. getDate () It returns the integer value between 1 and 31 that represents the day for the specified date on the basis of local time. The following methods mutate the original array: Many array methods take a callback function as an argument. Javascript - Array of objects group by year, month and date (4 answers) Group array of object by month and year (6 answers) Closed 1 min ago . Here is very simple approach to get month name :