The definition of JS array object and its related properties and methods

Array:

The array object in JS is essentially the same as the collection in Java, and its length is variable. The element can be any type of object.

Defined:

New Array (); New Array (size); New Array (element0, Element1, ..., elementn); var array = [Element0,element1,..., ELEMENTN];
Define a two-dimensional array var array2w = [   [Element0,element1,..., elementn],   [Element0,element1,..., ELEMENTN],   [Element0,element1,..., Elementn]];

Common properties: Length Common methods:

Concat ()	Joins two or more arrays and returns the result.
Join ()	Put all the elements of the array into a string. element is delimited by the specified delimiter.
Pop ()	Delete and return the last element of the array
Push ()	Adds one or more elements to the end of the array and returns the new length.
Reverse ()	Reverses the order of the elements in the array.
Shift ()	Delete and return the first element of the array
Sort ()	Sorting elements of an array
ToString ()	Converts the array to a string and returns the result.
Unshift ()	Adds one or more elements to the beginning of the array and returns the new length.

The definition of JS array object and its related properties and methods