A description of JavaScript array (array) related methods _javascript techniques

1. Create an Array object (in the case of an initial value) two methods:
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 array length
3.toString (): Outputs all the elements in an array.
Alert (acolor.tostring ());////output:red,black,yellow
4.valueOf (): Same 3
5.join (): Concatenate array value, connect array through connector, return linked string
Eg.alert (Acolor.join ("->"));//output:red->black->yellow
(string) 6.split (): Splits a string into an array of characters, where split ("") splits the string into a single character array, eg. Str "split into S,t,r
7.contact (): Attaches the parameter to 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 item.
9.push ()/pop ():p Ush () adds an item at the end of the array, POPs () 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 (): Deletes the first item in the array
11.unshift (): Adds the first item to the array, and the other items are moved back.
var acolor=new Array (' Red ', ' black ', ' yellow ');
Acolor.shift ();
Alert (acolor.tostring ());
Acolor.unshift ("Red");
Alert (acolor.tostring ());
12.reverse (): Reverses the order of the array items.
13.sort (): Sorted in ascending order of an array of items.
eg.
var acolor=new Array (' Red ', ' black ', ' yellow ');
Acolor.sort ();
alert (Acolor);
Alert (Acolor.reverse ());
14.splice ().