storage

问题 I am working on a project which has to store tens and thousands of images on a server and let the users access them. I need the most efficient method to store these images and to retrieve them. Also, I need information about which technology I should opt. I haven't started the project yet. So, I am thinking between PHP w/ CodeIgniter and Ruby on Rails. The site hosts many images that are uploaded only by the Authors of the content, and not by the users. 回答1: When you store images, it is

问题 The Xoom does not have a working SD slot, so Moto decided to re-route calls to External Storage to the internal storage: String path = Environment.getExternalStorageDirectory().getPath() + "/newfolder/"; The above line returns a path to the Internal storage on the Xoom, and to the SD card on my Droid. However, I am having trouble writing to this path on a Xoom. It's as if it is write protected, or I do not have permission. This code creates a folder on my Droid's SD card, but not on my Xoom's

问题 Whats the difference between the two calls? It almost seems identical but running it tells me otherwise. Calling the property from within the variable, and outside the variable seem to be calling different things but I'm not sure how or why. PS. Cheese is a boolean property set to false. toggleCheese: function(position) { var pizza = this.pizza[position].cheese; pizza = !pizza; } vs toggleCheese: function(position) { var pizza= this.pizza[position]; pizza.cheese = !pizza.cheese; } 回答1: Let’s

问题 Let's say First.class has a variable String currentValue = "Red" with a button that leads to Second.class (an activity). First.class(Activity) displays in a textview what the variable currentValue happens to be. (Currently, Red). If we push the button, it takes us to Second.class, which has an EditText box to modify the variable in First.class. It also has a button to confirm the change. Finally, it has a TextView at the very bottom showing a preview of what First.class' value variable is.

问题 I'm working with three tabs called 'Monday', 'Tuesday' and 'Favorites'. I have a toggle icon which is an empty heart at start 'favorite i'. If I'm in Monday and click on the icon, the empty heart turns to be filled out and its parent is cloned and added to the '#fav' tab. When this happens the clone is saved to local storage. So if people refresh the page, they can still see their preferences. When the heart is clicked in one of those cloned divs that specific div is removed from '#fav' and

问题 What is the behavior of various systems when you have more than one copy of a particular program or library running, do string literals get stored once in RAM or once for every copy of the process/library? What if they are stored in an array like: static const char *const foo[] = { "bar", "baz", "buz" }; Does the static change the behavior of the memory storage at all? Edit: Since it is likely platform specific, what is the behavior on Microsoft compiler on Windows or GCC on linux (x86)? 回答1:

问题 This question already has answers here : C++ sector aligned read (2 answers) SetFilePointer without FILE_FLAG_NO_BUFFERING (2 answers) Closed 2 years ago . First, here are a couple links i looked at... Read and write hard disk sector directly and efficiently Read specific sector on hard drive using C language on windows I'm trying to do almost the same thing. What I'm having trouble with is reading the device multiple times so I can store the read bytes from a DEVICE (USB) to writing them

问题 In Codenameone I have the following code: String url = "http://www.example.com/advertisement.png"; String key = "goose_id-"+System.currentTimeMillis(); Dimension dimension = new Dimension(200, 200); ImageDownloadService.createImageToStorage(url, label, key, dimension); // Please note that every image will be assigned to // a storage key that begins with "goose_id_" string In this way, every time I change the file advertisement.png in the server the user, in his device, will get a different

问题 I am creating a website that allows users to post news, photos, videos... My database is roughly like this: PostNews_M table has a column named ImgID , this column is foreign key to the table Image_M (ImgID, Link) . I think if the site has fewer users with little post, every post has little images, so the images stored on the server does not problem matter. But if one day the website has more users, the storage of such image will have problems, it will cause the server to store more images,

问题 I am making a Cordova application from which I need to export a file. I would like to save the file to the Android device's storage: /storage/emulated/0/ . The app should create a folder in which it will create a file with content in it. I tried the cordova-plugin-file plugin but I'm not sure how to use it. There are examples on the plugin's documentation but I don't know which one to use, there is: Create a persistent file Write to a file Append a file using alternative methods And I tried