Introduction to array methods in ja

push()
push() method adds one or more elements to the end of the array and returns the new array length.

pop()
The pop() method is the opposite of the push() method. It deletes the last element of the array.

unshift()
The unshift() method is very similar to the push() method. It adds one or more elements to the head. , and returns the length of the new array.

shift()
The shift() method is very similar to the pop() method. It deletes the first element of the array and Returns a new array with other elements moved forward.

join()
The join() method converts all elements in the array into strings and joins them together.

reverse()
#reverse() method sorts the elements in the array upside down.

concat()
The concat() method creates a new array.

slice()
The slice() method returns a slice of the specified array.

splice()
The splice() method is a general method for inserting or deleting elements in an array.

toString()

tostring() converts all elements of the array into strings and outputs a comma-separated list of strings, and The string returned by calling the join() method without any parameters is consistent.