storage

问题 My web application have a continuously running service to send a report to a ftp server, the file need to be encrypted by using a Public Key. Thus my question is where should I store the Public Key? I only have one Public Key so using an advanced Key Store seems to be overkill? Should I just manually create a folder on the server and store it in there? 回答1: Storage of the public key (or more likely a certificate containing it) isn't the part that matters. What matters is the location of the

问题 My web application have a continuously running service to send a report to a ftp server, the file need to be encrypted by using a Public Key. Thus my question is where should I store the Public Key? I only have one Public Key so using an advanced Key Store seems to be overkill? Should I just manually create a folder on the server and store it in there? 回答1: Storage of the public key (or more likely a certificate containing it) isn't the part that matters. What matters is the location of the

问题 So let me start by telling you what works... in the Buildozer Spec File I have: android.permissions = WRITE_EXTERNAL_STORAGE, READ_EXTERNAL_STORAGE, INTERNET and in my code I have: from android.permissions import request_permissions from android.permissions import Permission request_permissions([Permission.WRITE_EXTERNAL_STORAGE, Permission.READ_EXTERNAL_STORAGE]) When I run the app for the first time it asks me (as a user) to grant permission to access storage. On the Samsung Tablet I'm

问题 I have to work on a calculator. I got everything i need. The only thing is, I have to add a LocalStorage under my Result. So the Calculator adds everytime the result, untill i delete the session. For example: "1+1=2," 2*2=4, 8/8=1 Localstorage: 2,4,1 function clear() { number1.value = ""; number2.value = ""; } function clearresult() { result.innerText = ''; } function calc() { var number1 = parseFloat(document.getElementById('number1').value); var number2 = parseFloat(document.getElementById(

问题 I used download manager to download a file to external storage. I set the destination to Download folder using request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, fileName) After success I retrieve the uri with val fileUri=cursor.getString(cursor.getColumnIndex(DownloadManager.COLUMN_LOCAL_URI)) which gives me this file:///storage/emulated/0/Download/dishapatani_Jan%2007%2C%2008%3A07_1609986166669.mp4 Now I try to play this video file using intent with this val uri=Uri

问题 Would any compiler experts be able to comment on the efficient use of boolean values? Specifically, is the compiler able to optimize a std::vector<boolean> to use minimal memory? Is there an equivalent data structure that would? Back in the day, there were languages that had compilers that could compress an array of booleans to a representation of just one bit per boolean value. Perhaps the best that could be done for C++ is to use std::vector<char> to store the boolean values for minimal

问题 Would any compiler experts be able to comment on the efficient use of boolean values? Specifically, is the compiler able to optimize a std::vector<boolean> to use minimal memory? Is there an equivalent data structure that would? Back in the day, there were languages that had compilers that could compress an array of booleans to a representation of just one bit per boolean value. Perhaps the best that could be done for C++ is to use std::vector<char> to store the boolean values for minimal

问题 I have a PostgreSQL table named census . I have performed the ANALYSE command on the table, and the statistics are recorded in pg_stats . There are other entries in this pg_stats from other database tables as can be expected. However, I wanted to know the space consumed for storing the histogram_bounds for the census table alone. Is there a good and fast way for it? PS: I have tried dumping the pg_stats table onto the disk to measure the memory using select * into copy_table from census where

问题 I have a PostgreSQL table named census . I have performed the ANALYSE command on the table, and the statistics are recorded in pg_stats . There are other entries in this pg_stats from other database tables as can be expected. However, I wanted to know the space consumed for storing the histogram_bounds for the census table alone. Is there a good and fast way for it? PS: I have tried dumping the pg_stats table onto the disk to measure the memory using select * into copy_table from census where

问题 I have the following problem: I'm using Redis with NodeJS together via mranney's driver and my NodeJS webserver is retrieving some data from Redis, doing some operations on it and saving it back to the Redis. But this operation (call it X) may take a while so multiple users can fire it at the same time on the same resources. So if a user A fires X and user B fires X at the same time I want user A to finish the job and then user B to get the (processed) data and do X. In the meantime user B