A brief summary of commonly used array operation methods for js

Updated: June 20, 2014 09:22:19 Submission: junjie

This article mainly introduces a brief summary of commonly used array operation methods for js. It directly uploads the code. There are detailed comments in the code. Friends who need it can refer to it.

//Array segmentation in javascriptvar colors = ["red","green","blue"];
//alert(());
alert(("|")); //The return result is red|green|bluevar colors = ["red","green","blue",null];
alert(("|"));//red|green|blue|
//Note that when there is a value in the array that is null or undefined, the returned result is represented by an empty string-------------------------------------------
//Delete and add arrayvar colors = ["red","green","blue"];
//alert(());
("white","test");//The result returned is the length of the arrayalert(("|"));//The result is red|green|blue|white|test//Add elements to the beginning of the arrayvar colors = ["red","green","blue","test"];
var item = ("first");//Add an element at the beginning of the arrayalert(("|"));//Return the last array

//Delete the elementvar colors = ["red","green","blue","test"];
var item = ();//Return the deleted option result testalert(("|"));//Return the last array result red|green|blue//Delete the beginning elementvar colors = ["red","green","blue","test"];
var item = ();//The first option to delete the arrayalert(("|"));//Return the last array-------------------------------------------------
//Array order example//The order is reversedvar colors = ["red","green","blue","test"];
();
alert(colors);//The result is: test, blue, green, red//Array sortvar values = [0,1,5,10,7];
(compare);
alert(values);
//(values);

}
 function compare(value1,value2){
	if(value1&lt;value2){
		return 1 ;
	}else if(value1&gt;value2){
		return -1 ;
	}else return 0 ;
} 
-----------------------------------------------------
//Add array to array concat() methodvar colors = ["color","red"];
var colors2 = (["ccc","bbbb"],'3333',['vvccxx',['oolll','lll']]);
alert(colors2);//The return result is: color, red, ccc, bbbb,3333, vvccxx, oolll, lll
//Slice() method copying elements in the array will not destroy the previous elementsvar colors = ["color","red",'eeee','221111'];
var colors2 = (1);//Copy from 1alert(colors2);//The result is: red,eeee,2211111
var colors = ["color","red",'eeee','221111'];
var colors2 = (1,3);//Copy from 1 to end at 3rd positionalert(colors2);//The result is red,eeee---------------------------------------------------------------------
//Delete elements in the arrayvar a = [1,2,3,5,8];
var r = (0,2); //Delete the first 2 itemsalert(a);//The result is 3,5,8
var a = [1,2,3,5,8];
var r = (1,1,100,200); //Delete an item from the second number and insert 100 200alert(a);//turn out1,100,200,3,5,8

js
Array operation
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A brief summary of commonly used array operation methods for js

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