Hi!
Today in the Department of the department feel completely without reading the state of the paper, learn something else.
1, JS
-js object Definition and PHP are different, and there are similarities, learning a little meaning, feel good will be very skilled, a bit difficult to get started
<! DOCTYPE html>
<meta http-equiv= "Content-type" content= "text/html; Charset=utf-8 "/>
<title> Date Objects </title>
<script type= "Text/javascript" >
Attributes of DateTime objects
var mydate=new Date ();
document.write ("Current Time:" +mydate+ "<br>");
Mydate.settime (Mydate.gettime () + 60 * 60 * 1000);
document.write ("Delayed two hours:" + mydate);
Properties of a String object
var message= "I Love javascript!";
var mychar= message.tolowercase ();
document.write ("string:" +mychar+ "<br>");
var mystr= "I Love javascript!";
document.write (Mystr.charat (mystr.length-1));//Returns the last character in a string
document.write (Mystr.indexof ("O", Mystr.indexof ("O") +1);//Position The second o appears, no return-1
document.write (Mystr.split ("-") + "<br/>");//String split output
document.write (Mystr.split ("") + "<br/>");
document.write (Mystr.split ("", 3));
document.write (Mystr.substring (Mystr.indexof ("W")) + "<br/>");//extract output some strings
document.write (Mystr.substring (Mystr.indexof ("H"), 5));
document.write (MYSTR.SUBSTR (5) + "<br/>");
document.write (Mystr.substr (0,5));
The following is a mathematical type of object
document.write (Math.ceil (3.3) + "<br/>")//rounding up. Ceil () Note negative numbers
document.write (Math.ceil ( -0.1) + "<br/>")
document.write (Math.ceil ( -9.9) + "<br/>")
document.write (Math.ceil (8.9) + "<br/>")
document.write (Math.floor (3.3) + "</br>")//Down rounding
document.write (Math.floor ( -0.1) + "</br>")
document.write (Math.floor ( -9.9) + "</br>")
document.write (Math.floor (8.9) + "</br>")
document.write (Math.Round (3.3) + "</br>")//rounding
document.write (Math.Round ( -0.1) + "</br>")
document.write (Math.Round ( -9.9) + "</br>")
document.write (Math.Round (8.9) + "</br>")
document.write (Math.Round (Math.random () *10))//random number randomly (), randomly generated 0-1, so 0-100, is behind *100, analogy
Array Object
var myarr1= new Array ("010")//Array link. Concat ()
var myarr2= new Array ("-", "84697581");
document.write (Myarr1.concat (MYARR2))
var myarr1= new Array ("86", "010")//extract array contents to a string,. Join ("string")
var myarr2= new Array ("84697581");
var myarr3= myarr1.concat (MYARR2);
document.write (Myarr3.join ("-"))
document.write (Myarr1.reverse ())//reverse string output. Reverse ()
document.write (Myarr1.slice (-3))//output a series of elements
</script>
<body>
</body>
Department of the afternoon, pick up the Courier Day
Start building with 50+ products and up to 12 months usage for Elastic Compute Service
1 on 1 presale consultation
24/7 Technical Support 6 Free Tickets per Quarter Faster Response
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.
A comprehensive suite of global cloud computing services to power your business
Payment Methods We Support
