[Label] [JavaScript] seven JavaScript tips

Focus: http://www.javascriptkit.com/

Create an object:

var car = new Object ();

Car.colour = ' red ';

Car.wheels = 4;

Car.hubcaps = ' spinning ';

Car.age = 4;

The same can acchieved with:

var car = {

Colour: ' Red ',

Wheels:4,

Hubcaps: ' Spinning ',

Age:4

}

Note: But what happens when do you use invalidUserInSession ? The main gotcha in this notation is IE. Never ever leave a trailing comma before the closing curly brace or you'll be in trouble.

var moviesthatneedbetterwriters = new Array (

' Transformers ', ' Transformers2 ', ' Avatar ', ' Indiana Jones 4 '

);

var moviesthatneedbetterwriters = [

' Transformers ', ' Transformers2 ', ' Avatar ', ' Indiana Jones 4 '

];

Sort the data in an array, using the sort () directly, refer to the article: http://www.javascriptkit.com/javatutors/arraysort.shtml

Notice that the can not use sort () on a number array because it sorts lexically (lexical aspect).

var numbers = [23, 342, 87, 145];

Numbers.sort (function (A, b) {return a B;}); Ascending, ascending

Numbers.sort (function (A, b) {return b-a;}); /descending, Descending

Math.max (123, 3, 2, 433, 4);//math.max () return the largest number form a list of parameters

Because This tests for numbers and returns the largest one, you can use it to test for browser support of Cetain Properti Es.

var scrolltop = Math.max (

Doc.documentElment.scrollTop,

Doc.body.scrollTop

);

[Label] [JavaScript] seven JavaScript tips