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The JavaScript method that has been validated can be usedvarDeviceAgent =navigator.userAgent.toLowerCase (); 02.varAgentid = Deviceagent.match (/(iphone|ipod|ipad|android)/); 03.if(Agentid.indexof ("iphone") >=0){ Alert ("iphone"); 05. } 06.if(Agentid.indexof ("ipod") >=0){ . Alert ("ipod"); 08. } 09.if(Agentid.indexof ("ipad") >=0){ Alert ("ipad"); 11. } 12.if(Agentid.indexof ("Android") >=0){ Alert ("Android"); 14.}These two methods test down, in general can meet the needs, encounter like

============ Problem Description ============Make another alarm service,I'm passing in Class A.Pendingintent pi_1=pendingintent. Getbroadcast (context, re_1.getalarm_id (), intent_1, 0);Amanager.set (Alarmmanager.rtc_wakeup, Notifydate_1, pi_1); To create a reminder service,I will restore the pendingintent in a class by intent, and then cancel: Amanager.cancel (PI);Results are always reported: NullPointerExceptionExcuse me:1. How to determine whether two pendingintent is the same, if different h

: @"./.."] Stringbyappendingpathcomponent:relativecachepath]; BreakCase 2: //If the app was anywhere else, default to hardcoded/var/mobile/Path = [@"/var/mobile" Stringbyappendingpathcomponent:relativecachepath];BreakDefault: //Cache not found (loop not broken)return NO;Break}BOOL isdir = NO;if ([[Nsfilemanager Defaultmanager] fileexistsatpath:path isdirectory: isdir]) //Ensure that file exists {if (Isdir = = YES){NSLog (@"Dir"); }Else{Cachedict = [Nsdictionary Dictionarywithcontentsoffile:path]

different circumstances, but these screens are not linked in some way. The crux of the problem is that when the design scheme is presented to everyone in this way, users only have a rough understanding of the product appearance. The design team did not focus on the product's working mechanism, nor did it simulate how customers interact with the product. Therefore, when some teams unilaterally regard the design as a product blueprint, their comprehensive reasoning capabilities of product interac

IE browserAfter opening the website you want to judge, enter Javascript:alert (document.lastmodified) in the URL box. This method can determine the last update time of a Web page. If the time is the same as the current time, the description is pseudo-static, and the reverse is true static.　Firefox Firefox browserFirst use Firefox to open a Web page, and so on when the page is fully opened into the Firefox console, "Tools"-"Error Console"-Shortcut: Shift+ctrl+j, and then enter in the console: Ale

); If the global variable is not empty if (application["Sessioncount"]! = null) { Labapplication.text = session["username1"] + " Total landed "+ application[" Sessioncount "]. ToString () + "Times";}}}} Welcome.aspx Global.asax protected void Application_Start (object sender, EventArgs e) { //Global Counter Count +1 application["sessioncount

textutils.isempty (str) and Str.isempty ()? Which is better? Please write the reason?? In the case of a return result, one difference is that when STR is empty (null) or an empty string (""), Textutils.isempty (str) returns TRUE, otherwise false is returned. Str.isempty () null pointer exception when empty (null).?? In terms of efficiency, str.isempty () faster than Textutils.isempty (), because if you look at the official source code can be found Textutils.isempty () judged two steps, first ju

Can someone tell me why the output of sum_area is always 0 (the polygon center of gravity) and the sum_area center of gravity?Polygon Center of Gravity Problem time limit: 3000 MS | memory limit: 65535 KB difficulty: 5 Description On a polygon, n points are obtained. The n points are given in order and adjacent points are connected in a straight line (the first and last connections ), all line segments do not overlap with other line segme

Which eldest brother can tell you why $ _ post does not get the form value and does not show it in a pop-up box? Contacts

Using the Storagefolder.trygetitemasync method, try to get the file or folder by name without adding the error capture logic to the code (as if using Storagefolder.getitemasync same). If a file or folder is not found, trygetitemasync returns nullwithout throwing an exception. Because this method returns null, you can use it to check whether the specified file or folder exists.Note that it is generally important to use Trygetitemasync to determine if a file exists and then proceed to the next ste

Php developers and composer have to tell stories, and composer has to say Composer is a very popular PHP package dependency management tool that has replaced PEAR package manager. It is necessary for PHP developers to master Composer. For users, Composer is very simple. You can use a simple command to download the required code packagevendorDirectory, then the developer can introduce the package and use it.The key lies in the definition of your projec

Can you tell me how to specify the serial port output by the terminal on the Linux ARM (just give me a prompt)-General Linux technology-Linux technology and application information? The following is a detailed description. Half of the development boards running Linux on ARM have a dedicated serial port used to output terminal information. This serial port is generally configured with 115200 N 1. I would like to ask you to specify which technology is u

Which technical pioneer can tell me where the kernel should start-Linux general technology-Linux programming and kernel information. The following is a detailed description. Check where the kernel should start. I use the source insight software. After going in, it will be like a maze. I don't know which version to check and which file to start from, I already have some knowledge about assembly and operating systems. I have been in touch with linux for

Network security experts use practice to tell you How situation awareness should be implemented and how network security situation should be handled. In a large-scale network environment, cybersecurity Situation Awareness obtains, understands, displays, and predicts the future development trend of all security elements that can cause changes in the network situation, does not stick to a single security element. The situation awareness system consists

Experts tell you what a layer-3 switch is. Now every household has their own computer and understands what a layer-3 switch is. At that time, the layer-3 switch was based on software and the forwarding speed was very slow, later, it was developed to implement layer-3 switching with hardware. In, a layer-3 switch was born. So what is a layer-3 switch? In the early days, people wanted to combine the layer-2 switching and layer-3 routing functions on a s

Quietly tell you how to set up your own port forwarding mechanism? Q: We often hear "port forwarding". This is a way to improve the download speed and Game speed. What is port forwarding? Port forwarding is to redirect the computer signal so that the signal enters your computer along a specific electronic path. If the computer signal can be transmitted to your computer several milliseconds faster, this speed advantage will increase significantly for

hWnd, IntPtr HDC);[DllImport ("Gdi32.dll")]public static extern int Getclipbox (IntPtr HDC, ref Rectangle lpRect);Determine if the form is obscuredpublic bool Windowpall (INTPTR ahandle){if (!IsWindowVisible (Ahandle)) return false; Form not visibleIntPtr VDC = GETWINDOWDC (Ahandle);Try{Rectangle vrect = new Rectangle ();Getclipbox (VDC, ref vrect);Return vrect.width-vrect.left Special Note: Rectangle.width corresponding API in Rect.right, Rectangle.height for Rect.bottom}Finally{ReleaseDC (Aha

code may also lock the object. This can result in a deadlock, where two or more threads wait to release the same object. For the same reason, locking public data types (compared to objects) can also cause problems. and lock (this) is only valid for the current object, if the synchronization effect is not achieved between multiple objects. Lock (typeof (Class)) is too wide to be the same as a locked string.SummarizeThe introduction of lock is here, there are a few points to note1. Lock is an obj

successful and debug, based on the return valueThe following example is also this routine to complete, the small partners can go to register a personal contact, the place of the small function we can use in their own development of a public platform after the small function for our users to find the number of the phone he wants to know the place of attribution, it is very cool!The code is as follows:Small function is very simple, but very practical, small partners want to play more API, you can

If tested with typeof, arrays and objects are displayed as object, tested by Var mycars=new array (), mycars[0]= "Saab", mycars[1]= "Volvo", mycars[2]= "BMW"; Console.log (Mycars instanceof Array), var person={firstname: "John", LastName: "Doe", Age:50,eyecolor: "Blue"}; Console.log (person instanceof Object) or Object.prototype.toString.call (AAA) can be used to determine if the array returned is Object.array, The Object.object object returns a. There is also a way to access the property values