storage

问题 I create only a table from code but inside still empty. I instead insert data by pull a file out and insert by SQLite Browser when run the emulator then, put it back to the data/data/package_name/file.db with this solution, after run the program I can see the list of information in Emulator. But moving the application on a real device, I cannot see any list of information on a real device. How should I do? Because my application just provide the data to user, so user has no need to add or

问题 I wrote a shiny app for sports betting which enables me to run a model and pick a winner, add additional variables if I decide to bet on a game and store this in a database, and track my betting performance and adapt strategies using this information. The app works fine so far, but has one major flaw: when I made the calculations and decide to bet on a game, I can simply add another row into a database by using a submit button. The problem is that I have two important columns for data

问题 this may seem a repeated question but none of the answers or tutorials I found could help me :( . I'm beginner with the phongap. I would like to save a text file in a specific folder in the internal storage of the android device (android 4.4). I have used the exact code mentioned in the phonegap documents (the "Full Example" one) and I have given the needed permissions in the manifest. (http://docs.phonegap.com/en/2.6.0/cordova_file_file.md.html#FileWriter) after compiling it by the phonegap

问题 I am facing some storage issue. i am working on an application where i have to access phone's on board external storage and an External sdCard storage which i am getting with this code Environment.getExternalStorageDirectory(); But when onBoard external memory exists then this code returns the path of onBoard memory not the external sdCard while the sdCard is mounted now the problem is.. i want to access both memories onBoard and external sdcard is there any way to access both memories 回答1:

问题 So I am writing a web app that needs to store ~40MB of offline data in a offline Web SQL database. It needs to work in Chrome (desktop), Safari (desktop and mobile) and android's browser. Now I know that Web SQL is supported in these browsers and I know since which versions but i need to know how much storage is allowed. Safari desktop supports 500MB of database storage. Safari mobile supports 50MB of database storage. However I have spent literally hours searching everywhere to find out what

问题 Is the code below safe? It might be tempting to write code akin to this: #include <map> const std::map<const char*, int> m = { {"text1", 1}, {"text2", 2} }; int main () { volatile const auto a = m.at("text1"); return 0; } The map is intended to be used with string literals only. I think it's perfectly legal and seems to be working, however I never saw a guarantee that the pointer for the literal used in two different places to be the same. I couldn't manage to make compiler generate two

问题 I am planning to automate the testing of an application by creating a log to store some results of execution of the app and latter on parse it using a piece of python code and plot a graph. The application is a WiFi fingerprinter i.e it collects info such as mac id, rss(recieved signal strength and rank(normalized rss) about the wifi devices in the surrounding environment. So to test this application I would have to take it to the location and record the results(as of now manually). So logcat

问题 I have plenty of base64_encoded strings which I save in my MySQL DB. However, since base64_encoded strings are 33% larger, I would like to know how I can optimize my DB storage (Now I store my strings in a LONGTEXT field, but what about LONGBLOB or something similar?). So, how I can save my data (which is now base64 encoded) more optimized so I save storage space... (When selecting the value, I still have to be able to encode it base64 safely again). Thanks 回答1: If you have 5.6.1 or later,

问题 Let's say i want to build a website that will hold a very large number (at least 10 millions) of small files (around 50KB, mostly PDF , but also word/excel documents, jpg, and text files). Using SQL Server 2008 database, what are the different technical possibilities to store these files (eg: using a table with for filenames + filesystem for data, using varbinary, etc...) ? 回答1: SQL Server 2008 database provider many datatypes to store binary data. FILESTREAM datatype was introduced in SQL

问题 Locked . This question and its answers are locked because the question is off-topic but has historical significance. It is not currently accepting new answers or interactions. So I'm using an app that stores images heavily in the DB. What's your outlook on this? I'm more of a type to store the location in the filesystem, than store it directly in the DB. What do you think are the pros/cons? 回答1: I'm in charge of some applications that manage many TB of images. We've found that storing file