Array definition:
Method 1.
The code copy is as follows:
var mycars=new Array()
mycars[0]="sharejs.com"
mycars[1]="Volvo"
mycars[2]="BMW"
Method 2.
Definition and initialization together:
The code copy is as follows: var mycars=new Array("Saab","Volvo","BMW");
or:
The code copy is as follows: var mycars=["Saab","Volvo","BMW"];
JavaScript two-dimensional array, simulated with one-dimensional array:
Method 1.
The code copy is as follows: var arr = new Array(['a','b','c'],['d','e','f']);
arr[0] returns the first one-dimensional array, arr[0][0] returns the first element 'a' of the first one-dimensional array, the same below.
Method 2.
The code copy is as follows:
arr=new Array();
for(i=0;i<100;i++) {
arr[i]=new Array(...);
}
Method 3.
The code copy is as follows:
var arr=new Array(
new Array(),
new Array(),
new Array()
);
JavaScript array does not need to set length, it will expand itself, the array name.length returns the number of elements
Common functions for javascript arrays:
toString(): Convert an array into a string
toLocaleString(): Convert an array into a string
join(): convert an array into a string connected with symbols
shift(): move an element in the header of the array out
unshift(): Insert an element at the head of the array
pop(): Delete an element from the end of the array
push(): Add an element to the end of the array
concat(): Add elements to the array
slice(): Returns the part of the array
reverse(): reverse sort the array in reverse
sort(): sort the array
splice(): Insert, delete or replace an array element