local | 易学教程

Global and Local and Private Functions (Javascript)

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I am currently reading a book on Javascript by Pragmatic, and I'm confused about one thing. They have a section on how to make variables global, local, or private. What is the difference between local and private variables? Is there one? How does one make a variable global or local, They said something about putting 'var =' before it, but it was very vague. Raynos None, People use "private" because they are mistaken and are meant to say "local" local variables are defined as var foo = "local"; global variables are a properties of the global scope object (which is window in the browser) window

Save image locally and display in webview

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I have trouble with this simple piece of code. I download an image from the web and save it locally with : File mFile = new File(context.getFilesDir(), "a.png"); if(!mFile.exists()) { mFile.createNewFile(); } FileOutputStream fos = new FileOutputStream(mFile); fos.write(baf.toByteArray()); fos.flush(); fos.close(); I try to display this image on the ImageView and it's working. Now i try to display the save image on a WebView. String data = "<body>" +"<img src=\"a.png\"/></body>"; webview.loadDataWithBaseURL(getActivity().getFilesDir().toString(),data , "text/html", "utf-8",null); It's not

UnBoundLocalError: local variable referenced before assignment (Python)

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I'm trying to create a function servo_to_quadrant that returns the value servo_quadrant . Questions similar to this one have involved there being an issue with a global variable outside of the function. I don't think that's the issue in this case, as the variable is only needed from within the function (although I could be wrong). Code: def servo_to_quadrant(servo_val): if servo_val < 0: 360 + servo_val if servo_val >= 360: servo_val = servo_val - 360 if servo_val >= 0 and servo_val < 90: servo_quadrant = 1 if servo_val >= 90 and servo_val < 180: servo_quadrant = 2 if servo_val >= 180 and

How to load files into webview in native script

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I've been trying to figure out a way to get a local webpage content to load and set the webview html content in native script. I've successfully got it working on the simulator but it doesn't seem to work on the device. I've googled around and most people are saying that I need to locate my html files in the 'Documents' dir of my app, but as far as I can see there is no way to get the files I need there when I deploy the app. Can anyone else shed some light on the ways to get files located in the documents folder of the app on deploy or copying them there at runtime. Thank you var

Problem calling a Local HTML File from XCode

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Here's my WebView Code: [webView loadRequest:[NSURLRequest requestWithURL:[NSURL fileURLWithPath: [[NSBundle mainBundle] pathForResource:@"index" ofType:@"html"]isDirectory:NO]]]; Here's my Error: *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[NSURL initFileURLWithPath:isDirectory:]: nil string parameter' Can anyone help? It's saying nil string but the NSURL string is index.html My only thought is that perhaps the index file isn't stored correctly. It's in the project directory - the same folder as the XCode project file xcodeproj and the info.plist

$.getJSON not working with local JSON file

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I am desperately trying to get a local build of a site to get a JSON file (also local) with no luck. The exact code worked perfect on my server, but once local, breaks. I get the JSON with jQuery like so: $.getJSON( "lib/js/app.json", function(data){ $.each(data, function(i,user){ +'<img src="'+user.thumbnail+'"/> }); } ); And receive this console error: XMLHttpRequest cannot load file://localhost/Users/blakestruhs/new/lib/js/app.json. Origin null is not allowed by Access-Control-Allow-Origin. I'm dying for an answer here. Please help me. frank_neff I think you use a Webkit browser like chrome

How to load files into webview in native script

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问题 I've been trying to figure out a way to get a local webpage content to load and set the webview html content in native script. I've successfully got it working on the simulator but it doesn't seem to work on the device. I've googled around and most people are saying that I need to locate my html files in the 'Documents' dir of my app, but as far as I can see there is no way to get the files I need there when I deploy the app. Can anyone else shed some light on the ways to get files located in

Cancelling single occurence of repeating local notification

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问题 I have scheduled repeating local notification for, let's say, 10.00 am. Repeat interval is one week. Is it possible to cancel programatically only single ocurrence of repeating notification? For example, it's 9.30 am, user has tapped checkbox and (programatically) cancelled notification, so it won't be displayed on 10.00, but will be displayed next week? 回答1: It is not possible to cancel single occurrence of a repeating local notification. When you are scheduling a notification in repeating

How do I access a local folder through its filename?

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I have a folder that is my animation/game, and in the folder is the .pyw file and a .wav music file. I have import wave wave.open() and I don't know what to put in the parenthesis. I know it is supposed to be the filename, but someone might install the game in an unknown directory. How do I access the local folder through the filename? The files are in the same folder, and the music is named "Music.wav". A common way this is done is by using the path of the current module, which is automatically available in the predefined __file__ variable, to determine the path to the file in the

Problem calling a Local HTML File from XCode

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问题 Here's my WebView Code: [webView loadRequest:[NSURLRequest requestWithURL:[NSURL fileURLWithPath: [[NSBundle mainBundle] pathForResource:@"index" ofType:@"html"]isDirectory:NO]]]; Here's my Error: *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[NSURL initFileURLWithPath:isDirectory:]: nil string parameter' Can anyone help? It's saying nil string but the NSURL string is index.html My only thought is that perhaps the index file isn't stored correctly.