A brief description of javaScript Array (array) related methods_javascript skills

1. There are two ways to create an Array object (when assigning an initial value):
var aColor=new Array('red','black','yellow');
alert(aColor.toString()); //output: red,black,yellow
var aColor=['red','black','blue'];
alert(aColor.toString());//output: red,black,blue
2.length: Get the length of the array
3.toString(): Output all elements in the array.
alert(aColor.toString());////output: red, black, yellow
4.valueOf(): Same as 3
5.join(): Connect the array values ​​and pass the array Connect with the connector and return the linked string
eg.alert(aColor.join("->"));//output:red->black->yellow
//(string)6.split (): Split the string into a character array, where split(" ") splits the string into a single character array, eg. "str" ​​is split into s, t, r
7.contact(): append the parameters At the end of the array, the returned function value is the new Array object
eg.
var aColor=new Array('red','black','yellow');
var aColorCon=aColor.concat( "1","2");
alert(aColorCon.toString());//output: red,black,yellow,1,2
8.slice(): Returns a new array with the specified items .
9.push()/pop(): push() adds an item to the end of the array, pop() deletes the last array item and returns the item value.
eg.
var aColor=new Array('red','black','yellow');
aColor.push("blue");
aColor.push("white") ;
alert(aColor.toString());
aColor.pop();
alert(aColor.toString());
10.shift(): Delete the first item in the array
11.unshift(): Add the first item to the array, and move the other items backward.
var aColor=new Array('red','black','yellow');
aColor.shift();
alert(aColor.toString());
aColor.unshift( "red");
alert(aColor.toString());
12.reverse(): Reverse the order of array items.
13.sort(): Sort array items in ascending order.
eg.
var aColor=new Array('red','black','yellow');
aColor.sort();
alert(aColor);
alert(aColor .reverse());
14.splice().